diff --git a/.circleci/config.yml b/.circleci/config.yml
index 4f9ae88..14f8b2f 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -15,7 +15,7 @@ jobs:
           service-dir: "services/cntk-image-recon"
           mainnet-port: "7004"
           testnet-port: "7054"
-          run-command: "source '/cntk/activate-cntk';python3 run_image_recon_service.py --ssl"
+          run-command: "source '/cntk/activate-cntk';python3 run_service.py --ssl"
           docker-test-files: "Dockerfile, requirements.txt"
           docker-file-path: "services/cntk-image-recon/Dockerfile"
           docker-no-cache: true
@@ -37,7 +37,7 @@ jobs:
           service-dir: "services/deepfakes-faceswap"
           mainnet-port: "7060"
           testnet-port: "7061-7062"
-          run-command: "python3 run_deepfakes_faceswap_service.py --ssl"
+          run-command: "python3 run_service.py --ssl"
           docker-test-files: "Dockerfile, requirements.txt"
           docker-file-path: "services/deepfakes-faceswap/Dockerfile"
           docker-no-cache: true
@@ -59,7 +59,7 @@ jobs:
           service-dir: "services/deoldify-colorizer"
           mainnet-port: "7084"
           testnet-port: "7085"
-          run-command: "python3 run_colorize_service.py --ssl"
+          run-command: "python3 run_service.py --ssl"
           docker-test-files: "Dockerfile, requirements.txt"
           docker-file-path: "services/deoldify-colorizer/Dockerfile"
           docker-no-cache: true
@@ -81,7 +81,7 @@ jobs:
           service-dir: "services/i3d-video-action-recognition"
           mainnet-port: "7005"
           testnet-port: "7055"
-          run-command: "python3 run_video_action_recon_service.py --ssl"
+          run-command: "python3 run_service.py --ssl"
           docker-test-files: "Dockerfile, requirements.txt"
           docker-file-path: "services/i3d-video-action-recognition/Dockerfile"
           docker-no-cache: true
@@ -103,7 +103,7 @@ jobs:
           service-dir: "services/places365-scene-recognition"
           mainnet-port: "7019"
           testnet-port: "7079"
-          run-command: "python3 run_scene_recognition_service.py --ssl"
+          run-command: "python3 run_service.py --ssl"
           docker-test-files: "Dockerfile, requirements.txt"
           docker-file-path: "services/places365-scene-recognition/Dockerfile"
           docker-no-cache: true
@@ -125,7 +125,7 @@ jobs:
           service-dir: "services/pneumonia-diagnosis"
           mainnet-port: "7072"
           testnet-port: "7062"
-          run-command: "python3 run_pneumonia_diagnosis_service.py --ssl"
+          run-command: "python3 run_service.py --ssl"
           docker-test-files: "Dockerfile, requirements.txt"
           docker-file-path: "services/pneumonia-diagnosis/Dockerfile"
           docker-no-cache: true
@@ -147,7 +147,7 @@ jobs:
           service-dir: "services/real-time-voice-cloning"
           mainnet-port: "7064"
           testnet-port: "7065"
-          run-command: "python3 run_voice_cloning_service.py --ssl"
+          run-command: "python3 run_service.py --ssl"
           docker-test-files: "Dockerfile, requirements.txt"
           docker-file-path: "services/real-time-voice-cloning/Dockerfile"
           docker-no-cache: true
@@ -169,7 +169,7 @@ jobs:
           service-dir: "services/s2vt-video-captioning"
           mainnet-port: "7006"
           testnet-port: "7056"
-          run-command: "python run_video_cap_service.py --ssl"
+          run-command: "python run_service.py --ssl"
           docker-test-files: "Dockerfile, requirements.txt"
           docker-file-path: "services/s2vt-video-captioning/Dockerfile"
           docker-no-cache: true
@@ -191,7 +191,7 @@ jobs:
           service-dir: "services/sound-spleeter"
           mainnet-port: "7066"
           testnet-port: "7067"
-          run-command: "python3 run_sound_spleeter_service.py --ssl"
+          run-command: "python3 run_service.py --ssl"
           docker-test-files: "Dockerfile, requirements.txt"
           docker-file-path: "services/sound-spleeter/Dockerfile"
           docker-no-cache: true
@@ -213,7 +213,7 @@ jobs:
           service-dir: "services/yolov3-object-detection"
           mainnet-port: "7007"
           testnet-port: "7057"
-          run-command: "python3 run_object_detection_service.py --ssl"
+          run-command: "python3 run_service.py --ssl"
           docker-test-files: "Dockerfile, requirements.txt"
           docker-file-path: "services/yolov3-object-detection/Dockerfile"
           docker-no-cache: true
@@ -235,7 +235,7 @@ jobs:
           service-dir: "services/zeta36-chess-alpha-zero"
           mainnet-port: "7008"
           testnet-port: "7058"
-          run-command: "python3.6 run_alpha_zero_service.py --ssl"
+          run-command: "python3.6 run_service.py --ssl"
           docker-test-files: "Dockerfile, requirements.txt"
           docker-file-path: "services/zeta36-chess-alpha-zero/Dockerfile"
           docker-no-cache: true
@@ -254,47 +254,47 @@ jobs:
         - ssh-deployment/test:
               ssh-host: ${SSH_HOST_CNTK_IMAGE_RECON}
               ssh-user: ${SSH_USER_CNTK_IMAGE_RECON}
-              test-command: "sleep 10;source '/cntk/activate-cntk';python3 test_image_recon_service.py auto"
+              test-command: "sleep 10;source '/cntk/activate-cntk';python3 test_service.py auto"
               docker-container: "CNTK_IMAGE_RECON"
         - ssh-deployment/test:
               ssh-host: ${SSH_HOST_DEOLDIFY_COLORIZER}
               ssh-user: ${SSH_USER_DEOLDIFY_COLORIZER}
-              test-command: "sleep 10;python3 test_colorize_service.py auto"
+              test-command: "sleep 10;python3 test_service.py auto"
               docker-container: "DEOLDIFY_COLORIZER"
         - ssh-deployment/test:
               ssh-host: ${SSH_HOST_I3D_VIDEO_ACTION_RECON}
               ssh-user: ${SSH_USER_I3D_VIDEO_ACTION_RECON}
-              test-command: "sleep 10;python3 test_video_action_recon_service.py auto"
+              test-command: "sleep 10;python3 test_service.py auto"
               docker-container: "I3D_VIDEO_ACTION_RECON"
         - ssh-deployment/test:
               ssh-host: ${SSH_HOST_PLACES365_SCENE_RECOGNITION}
               ssh-user: ${SSH_USER_PLACES365_SCENE_RECOGNITION}
-              test-command: "sleep 10;python3 test_scene_recognition_service.py auto"
+              test-command: "sleep 10;python3 test_service.py auto"
               docker-container: "PLACES365_SCENE_RECOGNITION"
         - ssh-deployment/test:
               ssh-host: ${SSH_HOST_VOICE_CLONING}
               ssh-user: ${SSH_USER_VOICE_CLONING}
-              test-command: "sleep 10;python3 test_voice_cloning_service.py auto"
+              test-command: "sleep 10;python3 test_service.py auto"
               docker-container: "VOICE_CLONING"
         - ssh-deployment/test:
               ssh-host: ${SSH_HOST_S2VT_VIDEO_CAPTIONING}
               ssh-user: ${SSH_USER_S2VT_VIDEO_CAPTIONING}
-              test-command: "sleep 10;python test_video_cap_service.py auto"
+              test-command: "sleep 10;python test_service.py auto"
               docker-container: "S2VT_VIDEO_CAPTIONING"
         - ssh-deployment/test:
               ssh-host: ${SSH_HOST_SOUND_SPLEETER}
               ssh-user: ${SSH_USER_SOUND_SPLEETER}
-              test-command: "sleep 10;python3 test_sound_spleeter_service.py auto"
+              test-command: "sleep 10;python3 test_service.py auto"
               docker-container: "SOUND_SPLEETER"
         - ssh-deployment/test:
               ssh-host: ${SSH_HOST_YOLOv3_OBJECT_DETECTION}
               ssh-user: ${SSH_USER_YOLOv3_OBJECT_DETECTION}
-              test-command: "sleep 10;python3 test_object_detection_service.py auto"
+              test-command: "sleep 10;python3 test_service.py auto"
               docker-container: "YOLOv3_OBJECT_DETECTION"
         - ssh-deployment/test:
               ssh-host: ${SSH_HOST_CHESS_ALPHA_ZERO}
               ssh-user: ${SSH_USER_CHESS_ALPHA_ZERO}
-              test-command: "sleep 10;python3.6 test_alpha_zero_service.py auto"
+              test-command: "sleep 10;python3.6 test_service.py auto"
               docker-container: "CHESS_ALPHA_ZERO"
 
 workflows:
diff --git a/services/cntk-image-recon/Dockerfile b/services/cntk-image-recon/Dockerfile
index e723dae..e2945f6 100644
--- a/services/cntk-image-recon/Dockerfile
+++ b/services/cntk-image-recon/Dockerfile
@@ -20,7 +20,7 @@ RUN apt-get update && \
     curl
 
 # Installing SNET Daemon
-RUN SNETD_GIT_VERSION=`curl -s https://api.github.com/repos/singnet/snet-daemon/releases/latest | grep -oP '"tag_name": "\K(.*)(?=")' || echo "v3.1.3"` && \
+RUN SNETD_GIT_VERSION=`curl -s https://api.github.com/repos/singnet/snet-daemon/releases/latest | grep -oP '"tag_name": "\K(.*)(?=")' || echo "v3.1.6"` && \
     SNETD_VERSION=${snetd_version:-${SNETD_GIT_VERSION}} && \
     cd /tmp && \
     wget https://github.com/singnet/snet-daemon/releases/download/${SNETD_VERSION}/snet-daemon-${SNETD_VERSION}-linux-amd64.tar.gz && \
diff --git a/services/cntk-image-recon/README.md b/services/cntk-image-recon/README.md
index 59fbdc5..ade253c 100644
--- a/services/cntk-image-recon/README.md
+++ b/services/cntk-image-recon/README.md
@@ -45,7 +45,6 @@ Create the `SNET Daemon`'s config JSON file (`snetd.config.json`).
    "DAEMON_END_POINT": "DAEMON_HOST:DAEMON_PORT",
    "IPFS_END_POINT": "http://ipfs.singularitynet.io:80",
    "BLOCKCHAIN_NETWORK_SELECTED": "BLOCKCHAIN_NETWORK",
-   "PASSTHROUGH_ENABLED": true,
    "PASSTHROUGH_ENDPOINT": "http://SERVICE_GRPC_HOST:SERVICE_GRPC_PORT",  
    "ORGANIZATION_ID": "ORGANIZATION_ID",
    "SERVICE_ID": "SERVICE_ID",
@@ -66,7 +65,6 @@ $ cat snetd.config.json
    "DAEMON_END_POINT": "0.0.0.0:7054",
    "IPFS_END_POINT": "http://ipfs.singularitynet.io:80",
    "BLOCKCHAIN_NETWORK_SELECTED": "ropsten",
-   "PASSTHROUGH_ENABLED": true,
    "PASSTHROUGH_ENDPOINT": "http://localhost:7003",
    "ORGANIZATION_ID": "snet",
    "SERVICE_ID": "cntk-image-recon",
@@ -91,7 +89,7 @@ $ sh buildproto.sh
 ```
 Start the service and `SNET Daemon`:
 ```
-$ python3 run_image_recon_service.py
+$ python3 run_service.py
 ```
 
 ### Calling the service:
@@ -104,7 +102,7 @@ Inputs:
 Local (testing purpose):
 
 ```
-$ python3 test_image_recon_service.py 
+$ python3 test_service.py 
 Endpoint (localhost:7003): 
 Method (flowers|dogs): flowers
 Model (ResNet152): <ENTER>
@@ -112,7 +110,7 @@ Image (Link): https://www.fiftyflowers.com/site_files/FiftyFlowers/Image/Product
 1.8751
 {1: '98.93%: sunflower', 2: '00.64%: black-eyed susan', 3: '00.16%: barbeton daisy', 4: '00.14%: oxeye daisy', 5: '00.03%: daffodil'}
 
-$ python3 test_image_recon_service.py 
+$ python3 test_service.py 
 Endpoint (localhost:7003): 
 Method (flowers|dogs): dogs
 Model (ResNet152): <ENTER>
diff --git a/services/cntk-image-recon/requirements.txt b/services/cntk-image-recon/requirements.txt
index bb59a39..688b788 100644
--- a/services/cntk-image-recon/requirements.txt
+++ b/services/cntk-image-recon/requirements.txt
@@ -1,5 +1,5 @@
 grpcio>=1.14.2
 grpcio-tools>=1.14.1
 requests==2.20.0
-Pillow==6.2.0
-cntk==2.5
\ No newline at end of file
+Pillow==6.2.2
+cntk-gpu==2.7
\ No newline at end of file
diff --git a/services/cntk-image-recon/run_image_recon_service.py b/services/cntk-image-recon/run_service.py
similarity index 100%
rename from services/cntk-image-recon/run_image_recon_service.py
rename to services/cntk-image-recon/run_service.py
diff --git a/services/cntk-image-recon/service/image_recon.py b/services/cntk-image-recon/service/image_recon.py
index 2bcf1c0..89ecb86 100755
--- a/services/cntk-image-recon/service/image_recon.py
+++ b/services/cntk-image-recon/service/image_recon.py
@@ -87,7 +87,7 @@ def image_recognition(method, model, map_names, img_path, image_dims):
     except Exception as e:
         log.error(e)
         traceback.print_exc()
-        return {"delta_time": "Fail", "top_5": "Fail"}
+        return {"delta_time": "Fail", "top_5": "Fail", "error": str(e)}
 
 
 def generate_uid():
diff --git a/services/cntk-image-recon/service/image_recon_service.py b/services/cntk-image-recon/service/image_recon_service.py
index 0f9f8db..bc3947c 100644
--- a/services/cntk-image-recon/service/image_recon_service.py
+++ b/services/cntk-image-recon/service/image_recon_service.py
@@ -38,7 +38,7 @@ def __init__(self):
     # The method that will be exposed to the snet-cli call command.
     # request: incoming data
     # context: object that provides RPC-specific information (timeout, etc).
-    def flowers(self, request, _):
+    def flowers(self, request, context):
         manager = multiprocessing.Manager()
         return_dict = manager.dict()
         p = multiprocessing.Process(target=mp_image_recognition, args=("flowers",
@@ -50,13 +50,17 @@ def flowers(self, request, _):
         p.join()
 
         response = return_dict.get("response", None)
-        if not response:
-            return Output(delta_time="Fail", top_5="Fail")
+        if not response or "error" in response:
+            error_msg = response.get("error", None) if response else None
+            log.error(error_msg)
+            context.set_details(error_msg)
+            context.set_code(grpc.StatusCode.INTERNAL)
+            return Output()
 
         log.debug("flowers({},{})=OK".format(self.model, self.img_path))
         return Output(delta_time=response["delta_time"], top_5=str(response["top_5"]))
 
-    def dogs(self, request, _):
+    def dogs(self, request, context):
         manager = multiprocessing.Manager()
         return_dict = manager.dict()
         p = multiprocessing.Process(target=mp_image_recognition, args=("dogs",
@@ -68,7 +72,11 @@ def dogs(self, request, _):
         p.join()
 
         response = return_dict.get("response", None)
-        if not response:
+        if not response or "error" in response:
+            error_msg = response.get("error", "None") if response else "None"
+            log.error(error_msg)
+            context.set_details(error_msg)
+            context.set_code(grpc.StatusCode.INTERNAL)
             return Output(delta_time="Fail", top_5="Fail")
 
         log.debug("flowers({},{})=OK".format(self.model, self.img_path))
diff --git a/services/cntk-image-recon/snetd_configs/snetd.mainnet.json b/services/cntk-image-recon/snetd_configs/snetd.mainnet.json
index 325c9fd..b7e675a 100644
--- a/services/cntk-image-recon/snetd_configs/snetd.mainnet.json
+++ b/services/cntk-image-recon/snetd_configs/snetd.mainnet.json
@@ -1,7 +1,6 @@
 {
   "daemon_end_point": "0.0.0.0:7004",
   "ipfs_end_point": "http://ipfs.singularitynet.io:80",
-  "passthrough_enabled": true,
   "passthrough_endpoint": "http://localhost:7003",
   "blockchain_network_selected": "main",
   "organization_id": "snet",
diff --git a/services/cntk-image-recon/snetd_configs/snetd.ropsten b/services/cntk-image-recon/snetd_configs/snetd.ropsten
index f25fefd..722abf3 100644
--- a/services/cntk-image-recon/snetd_configs/snetd.ropsten
+++ b/services/cntk-image-recon/snetd_configs/snetd.ropsten
@@ -1,7 +1,6 @@
 {
   "daemon_end_point": "0.0.0.0:7054",
   "ipfs_end_point": "http://ipfs.singularitynet.io:80",
-  "passthrough_enabled": true,
   "passthrough_endpoint": "http://localhost:7003",
   "blockchain_network_selected": "ropsten",
   "organization_id": "snet",
diff --git a/services/cntk-image-recon/test_image_recon_service.py b/services/cntk-image-recon/test_service.py
similarity index 100%
rename from services/cntk-image-recon/test_image_recon_service.py
rename to services/cntk-image-recon/test_service.py
diff --git a/services/deepfakes-faceswap/Dockerfile b/services/deepfakes-faceswap/Dockerfile
index eb568ae..9f34ad1 100644
--- a/services/deepfakes-faceswap/Dockerfile
+++ b/services/deepfakes-faceswap/Dockerfile
@@ -25,7 +25,7 @@ RUN apt-get install -y libglib2.0-0 libsm6 libxext6 libxrender-dev
 RUN apt-get install -y python3 python3-pip ffmpeg
 
 # Installing SNET Daemon
-RUN SNETD_GIT_VERSION=`curl -s https://api.github.com/repos/singnet/snet-daemon/releases/latest | grep -oP '"tag_name": "\K(.*)(?=")' || echo "v3.1.3"` && \
+RUN SNETD_GIT_VERSION=`curl -s https://api.github.com/repos/singnet/snet-daemon/releases/latest | grep -oP '"tag_name": "\K(.*)(?=")' || echo "v3.1.6"` && \
     SNETD_VERSION=${snetd_version:-${SNETD_GIT_VERSION}} && \
     cd /tmp && \
     wget https://github.com/singnet/snet-daemon/releases/download/${SNETD_VERSION}/snet-daemon-${SNETD_VERSION}-linux-amd64.tar.gz && \
diff --git a/services/deepfakes-faceswap/README.md b/services/deepfakes-faceswap/README.md
index fe4b6fc..1cd30cb 100644
--- a/services/deepfakes-faceswap/README.md
+++ b/services/deepfakes-faceswap/README.md
@@ -36,7 +36,6 @@ Create the `SNET Daemon`'s config JSON file (`snetd.config.json`).
    "DAEMON_END_POINT": "DAEMON_HOST:DAEMON_PORT",
    "IPFS_END_POINT": "http://ipfs.singularitynet.io:80",
    "BLOCKCHAIN_NETWORK_SELECTED": "BLOCKCHAIN_NETWORK",
-   "PASSTHROUGH_ENABLED": true,
    "PASSTHROUGH_ENDPOINT": "http://SERVICE_GRPC_HOST:SERVICE_GRPC_PORT",  
    "ORGANIZATION_ID": "ORGANIZATION_ID",
    "SERVICE_ID": "SERVICE_ID",
@@ -57,7 +56,6 @@ $ cat snetd.config.json
    "DAEMON_END_POINT": "0.0.0.0:7005",
    "IPFS_END_POINT": "http://ipfs.singularitynet.io:80",
    "BLOCKCHAIN_NETWORK_SELECTED": "ropsten",
-   "PASSTHROUGH_ENABLED": true,
    "PASSTHROUGH_ENDPOINT": "http://localhost:7003",
    "ORGANIZATION_ID": "snet",
    "SERVICE_ID": "deepfakes-faceswap",
@@ -82,7 +80,7 @@ $ sh buildproto.sh
 ```
 Start the service and `SNET Daemon`:
 ```
-$ python3 run_deepfakes_faceswap_service.py
+$ python3 run_service.py
 ```
 
 ### Calling the service:
@@ -96,7 +94,7 @@ Inputs:
 Local (testing purpose):
 
 ```
-$ python3 test_deepfakes_faceswap_service.py
+$ python3 test_service.py
 Endpoint (localhost:7003): 
 Method (faceswap): 
 UID:
@@ -108,7 +106,7 @@ uid: "http://52.38.111.172:7006/dashboard?uid=705493e1b8594380e247"
 ```
 
 ```
-$ python3 test_deepfakes_faceswap_service.py
+$ python3 test_service.py
 Endpoint (localhost:7003): 
 Method (faceswap): 
 UID: 705493e1b8594380e247
diff --git a/services/deepfakes-faceswap/run_deepfakes_faceswap_service.py b/services/deepfakes-faceswap/run_service.py
similarity index 100%
rename from services/deepfakes-faceswap/run_deepfakes_faceswap_service.py
rename to services/deepfakes-faceswap/run_service.py
diff --git a/services/deepfakes-faceswap/snetd_configs/snetd.mainnet.json b/services/deepfakes-faceswap/snetd_configs/snetd.mainnet.json
index 4784d11..da0c038 100644
--- a/services/deepfakes-faceswap/snetd_configs/snetd.mainnet.json
+++ b/services/deepfakes-faceswap/snetd_configs/snetd.mainnet.json
@@ -1,7 +1,6 @@
 {
   "daemon_end_point": "0.0.0.0:7060",
   "ipfs_end_point": "http://ipfs.singularitynet.io:80",
-  "passthrough_enabled": true,
   "passthrough_endpoint": "http://localhost:7003",
   "blockchain_network_selected": "main",
   "organization_id": "snet",
diff --git a/services/deepfakes-faceswap/snetd_configs/snetd.ropsten b/services/deepfakes-faceswap/snetd_configs/snetd.ropsten
index cb536e0..cfeb01c 100644
--- a/services/deepfakes-faceswap/snetd_configs/snetd.ropsten
+++ b/services/deepfakes-faceswap/snetd_configs/snetd.ropsten
@@ -1,7 +1,6 @@
 {
   "daemon_end_point": "0.0.0.0:7061",
   "ipfs_end_point": "http://ipfs.singularitynet.io:80",
-  "passthrough_enabled": true,
   "passthrough_endpoint": "http://localhost:7003",
   "blockchain_network_selected": "ropsten",
   "organization_id": "snet",
diff --git a/services/deepfakes-faceswap/test_deepfakes_faceswap_service.py b/services/deepfakes-faceswap/test_service.py
similarity index 100%
rename from services/deepfakes-faceswap/test_deepfakes_faceswap_service.py
rename to services/deepfakes-faceswap/test_service.py
diff --git a/services/deoldify-colorizer/README.md b/services/deoldify-colorizer/README.md
index d8410b3..43b2e2c 100644
--- a/services/deoldify-colorizer/README.md
+++ b/services/deoldify-colorizer/README.md
@@ -45,7 +45,6 @@ Create the `SNET Daemon`'s config JSON file (`snetd.config.json`).
    "DAEMON_END_POINT": "DAEMON_HOST:DAEMON_PORT",
    "IPFS_END_POINT": "http://ipfs.singularitynet.io:80",
    "BLOCKCHAIN_NETWORK_SELECTED": "BLOCKCHAIN_NETWORK",
-   "PASSTHROUGH_ENABLED": true,
    "PASSTHROUGH_ENDPOINT": "http://SERVICE_GRPC_HOST:SERVICE_GRPC_PORT",  
    "ORGANIZATION_ID": "ORGANIZATION_ID",
    "SERVICE_ID": "SERVICE_ID",
@@ -66,7 +65,6 @@ $ cat snetd.config.json
    "DAEMON_END_POINT": "0.0.0.0:7085",
    "IPFS_END_POINT": "http://ipfs.singularitynet.io:80",
    "BLOCKCHAIN_NETWORK_SELECTED": "ropsten",
-   "PASSTHROUGH_ENABLED": true,
    "PASSTHROUGH_ENDPOINT": "http://localhost:7003",
    "ORGANIZATION_ID": "snet",
    "SERVICE_ID": "deoldify-colorizer",
@@ -91,7 +89,7 @@ $ sh buildproto.sh
 ```
 Start the service and `SNET Daemon`:
 ```
-$ python3 run_colorize_service.py
+$ python3 run_service.py
 ```
 
 ### Calling the service:
@@ -103,7 +101,7 @@ Inputs:
 Local (testing purpose):
 
 ```
-$ python3 test_colorize_service.py 
+$ python3 test_service.py 
 Endpoint (localhost:7003): 
 Method (colorize): colorize
 Image (Link): https://snet-models.s3.amazonaws.com/bh/Colorize/jucelino.jpg
diff --git a/services/deoldify-colorizer/run_colorize_service.py b/services/deoldify-colorizer/run_service.py
similarity index 100%
rename from services/deoldify-colorizer/run_colorize_service.py
rename to services/deoldify-colorizer/run_service.py
diff --git a/services/deoldify-colorizer/service/colorization.py b/services/deoldify-colorizer/service/colorization.py
index 2e9b27f..ba37513 100644
--- a/services/deoldify-colorizer/service/colorization.py
+++ b/services/deoldify-colorizer/service/colorization.py
@@ -87,5 +87,5 @@ def colorize(self):
         except Exception as e:
             log.error(e)
             traceback.print_exc()
-            self.response["img_colorized"] = "Fail"
+            self.response = {"img_colorized": "Fail", "error": str(e)}
             return self.response
diff --git a/services/deoldify-colorizer/service/colorization_service.py b/services/deoldify-colorizer/service/colorization_service.py
index 61e980b..186039a 100644
--- a/services/deoldify-colorizer/service/colorization_service.py
+++ b/services/deoldify-colorizer/service/colorization_service.py
@@ -36,7 +36,8 @@ def __init__(self):
     # The method that will be exposed to the snet-cli call command.
     # request: incoming data
     # context: object that provides RPC-specific information (timeout, etc).
-    def colorize(self, request, _):
+    @staticmethod
+    def colorize(request, context):
         try:
             manager = Manager()
             return_dict = manager.dict()
@@ -47,7 +48,11 @@ def colorize(self, request, _):
             p.join()
 
             response = return_dict.get("response", None)
-            if not response:
+            if not response or "error" in response:
+                error_msg = response.get("error", None) if response else None
+                log.error(error_msg)
+                context.set_details(error_msg)
+                context.set_code(grpc.StatusCode.INTERNAL)
                 return Output()
 
             log.debug("colorize({})={}".format(request.img_input[:50], response["img_colorized"][:50]))
diff --git a/services/deoldify-colorizer/snetd_configs/snetd.mainnet.json b/services/deoldify-colorizer/snetd_configs/snetd.mainnet.json
index cf9c1c1..2f4b783 100644
--- a/services/deoldify-colorizer/snetd_configs/snetd.mainnet.json
+++ b/services/deoldify-colorizer/snetd_configs/snetd.mainnet.json
@@ -1,7 +1,6 @@
 {
   "daemon_end_point": "0.0.0.0:7084",
   "ipfs_end_point": "http://ipfs.singularitynet.io:80",
-  "passthrough_enabled": true,
   "passthrough_endpoint": "http://localhost:7003",
   "blockchain_network_selected": "main",
   "organization_id": "snet",
diff --git a/services/deoldify-colorizer/snetd_configs/snetd.ropsten b/services/deoldify-colorizer/snetd_configs/snetd.ropsten
index 06a1e46..87a8ba1 100644
--- a/services/deoldify-colorizer/snetd_configs/snetd.ropsten
+++ b/services/deoldify-colorizer/snetd_configs/snetd.ropsten
@@ -1,7 +1,6 @@
 {
   "daemon_end_point": "0.0.0.0:7085",
   "ipfs_end_point": "http://ipfs.singularitynet.io:80",
-  "passthrough_enabled": true,
   "passthrough_endpoint": "http://localhost:7003",
   "blockchain_network_selected": "ropsten",
   "organization_id": "snet",
diff --git a/services/deoldify-colorizer/test_colorize_service.py b/services/deoldify-colorizer/test_service.py
similarity index 100%
rename from services/deoldify-colorizer/test_colorize_service.py
rename to services/deoldify-colorizer/test_service.py
diff --git a/services/i3d-video-action-recognition/Dockerfile b/services/i3d-video-action-recognition/Dockerfile
index 2e373fd..2a293cf 100644
--- a/services/i3d-video-action-recognition/Dockerfile
+++ b/services/i3d-video-action-recognition/Dockerfile
@@ -25,7 +25,7 @@ RUN apt-get install -y libglib2.0-0 libsm6 libxext6 libxrender-dev
 RUN apt-get install -y python3 python3-pip
 
 # Installing SNET Daemon
-RUN SNETD_GIT_VERSION=`curl -s https://api.github.com/repos/singnet/snet-daemon/releases/latest | grep -oP '"tag_name": "\K(.*)(?=")' || echo "v3.1.3"` && \
+RUN SNETD_GIT_VERSION=`curl -s https://api.github.com/repos/singnet/snet-daemon/releases/latest | grep -oP '"tag_name": "\K(.*)(?=")' || echo "v3.1.6"` && \
     SNETD_VERSION=${snetd_version:-${SNETD_GIT_VERSION}} && \
     cd /tmp && \
     wget https://github.com/singnet/snet-daemon/releases/download/${SNETD_VERSION}/snet-daemon-${SNETD_VERSION}-linux-amd64.tar.gz && \
diff --git a/services/i3d-video-action-recognition/README.md b/services/i3d-video-action-recognition/README.md
index 9aa6f38..0512780 100644
--- a/services/i3d-video-action-recognition/README.md
+++ b/services/i3d-video-action-recognition/README.md
@@ -36,7 +36,6 @@ Create the `SNET Daemon`'s config JSON file (`snetd.config.json`).
    "DAEMON_END_POINT": "DAEMON_HOST:DAEMON_PORT",
    "IPFS_END_POINT": "http://ipfs.singularitynet.io:80",
    "BLOCKCHAIN_NETWORK_SELECTED": "BLOCKCHAIN_NETWORK",
-   "PASSTHROUGH_ENABLED": true,
    "PASSTHROUGH_ENDPOINT": "http://SERVICE_GRPC_HOST:SERVICE_GRPC_PORT",  
    "ORGANIZATION_ID": "ORGANIZATION_ID",
    "SERVICE_ID": "SERVICE_ID",
@@ -57,7 +56,6 @@ $ cat snetd.config.json
    "DAEMON_END_POINT": "0.0.0.0:7055",
    "IPFS_END_POINT": "http://ipfs.singularitynet.io:80",
    "BLOCKCHAIN_NETWORK_SELECTED": "ropsten",
-   "PASSTHROUGH_ENABLED": true,
    "PASSTHROUGH_ENDPOINT": "http://localhost:7003",
    "ORGANIZATION_ID": "snet",
    "SERVICE_ID": "i3d-video-action-recognition",
@@ -82,7 +80,7 @@ $ sh buildproto.sh
 ```
 Start the service and `SNET Daemon`:
 ```
-$ python3 run_video_action_recon_service.py
+$ python3 run_service.py
 ```
 
 ### Calling the service:
@@ -94,14 +92,14 @@ Inputs:
 Local (testing purpose):
 
 ```
-$ python3 test_call_video_action_recon_service.py
+$ python3 test_service.py
 Endpoint (localhost:7003):
 Method (video_action_recon): 
 Model: 400
 Url: http://crcv.ucf.edu/THUMOS14/UCF101/UCF101/v_MoppingFloor_g25_c01.avi
 {'Action': 'mopping floor\t56.66%\ncleaning floor\t31.83%\nsweeping floor\t11.39%\nsanding floor\t0.02%\nshoveling snow\t0.01%\n'}
 
-$ python3 test_call_video_action_recon_service.py 
+$ python3 test_service.py 
 Endpoint (localhost:7003): <ENTER>
 Method (video_action_recon): <ENTER>
 Model: 600
diff --git a/services/i3d-video-action-recognition/run_video_action_recon_service.py b/services/i3d-video-action-recognition/run_service.py
similarity index 100%
rename from services/i3d-video-action-recognition/run_video_action_recon_service.py
rename to services/i3d-video-action-recognition/run_service.py
diff --git a/services/i3d-video-action-recognition/service/video_action_recon.py b/services/i3d-video-action-recognition/service/video_action_recon.py
index 11691a2..18298c8 100644
--- a/services/i3d-video-action-recognition/service/video_action_recon.py
+++ b/services/i3d-video-action-recognition/service/video_action_recon.py
@@ -158,11 +158,11 @@ def video_action_recon(self):
                         log.debug("{}\t{:.2f}%".format(labels[i], ps[i] * 100))
                         self.response["Top5Actions"] += "[{:05.2f}%] {}\n".format(ps[i] * 100, labels[i])
             else:
-                self.response["Top5Actions"] = self.error if self.error else "[Fail] Unexpected error!"
+                self.response["error"] = self.error if self.error else "[Fail] Unexpected error!"
 
         except Exception as e:
             log.error(e)
-            self.response["Top5Actions"] = "Fail"
+            self.response = {"Top5Actions": "Fail", "error": str(e)}
 
         # Deletes video folder.
         if os.path.exists(self.video_folder):
diff --git a/services/i3d-video-action-recognition/service/video_action_recon_service.py b/services/i3d-video-action-recognition/service/video_action_recon_service.py
index 959268b..447a9f8 100644
--- a/services/i3d-video-action-recognition/service/video_action_recon_service.py
+++ b/services/i3d-video-action-recognition/service/video_action_recon_service.py
@@ -37,7 +37,7 @@ def __init__(self):
     # The method that will be exposed to the snet-cli call command.
     # request: incoming data
     # context: object that provides RPC-specific information (timeout, etc).
-    def video_action_recon(self, request, _):
+    def video_action_recon(self, request, context):
         self.uid = generate_uid()
         self.model = request.model
         self.url = request.url
@@ -53,8 +53,12 @@ def video_action_recon(self, request, _):
         p.join()
 
         response = return_dict.get("response", None)
-        if not response:
-            return Output(value="Fail")
+        if not response or "error" in response:
+            error_msg = response.get("error", None) if response else None
+            log.error(error_msg)
+            context.set_details(error_msg)
+            context.set_code(grpc.StatusCode.INTERNAL)
+            return Output()
 
         log.debug("video_action_recon({},{})=OK".format(self.model, self.url))
         return Output(value=response["Top5Actions"])
diff --git a/services/i3d-video-action-recognition/snetd_configs/snetd.mainnet.json b/services/i3d-video-action-recognition/snetd_configs/snetd.mainnet.json
index 3b48729..7d408f7 100644
--- a/services/i3d-video-action-recognition/snetd_configs/snetd.mainnet.json
+++ b/services/i3d-video-action-recognition/snetd_configs/snetd.mainnet.json
@@ -1,7 +1,6 @@
 {
   "daemon_end_point": "0.0.0.0:7005",
   "ipfs_end_point": "http://ipfs.singularitynet.io:80",
-  "passthrough_enabled": true,
   "passthrough_endpoint": "http://localhost:7003",
   "blockchain_network_selected": "main",
   "organization_id": "snet",
diff --git a/services/i3d-video-action-recognition/snetd_configs/snetd.ropsten b/services/i3d-video-action-recognition/snetd_configs/snetd.ropsten
index 1458027..edf34ad 100644
--- a/services/i3d-video-action-recognition/snetd_configs/snetd.ropsten
+++ b/services/i3d-video-action-recognition/snetd_configs/snetd.ropsten
@@ -1,7 +1,6 @@
 {
   "daemon_end_point": "0.0.0.0:7055",
   "ipfs_end_point": "http://ipfs.singularitynet.io:80",
-  "passthrough_enabled": true,
   "passthrough_endpoint": "http://localhost:7003",
   "blockchain_network_selected": "ropsten",
   "organization_id": "snet",
diff --git a/services/i3d-video-action-recognition/test_video_action_recon_service.py b/services/i3d-video-action-recognition/test_service.py
similarity index 100%
rename from services/i3d-video-action-recognition/test_video_action_recon_service.py
rename to services/i3d-video-action-recognition/test_service.py
diff --git a/services/places365-scene-recognition/Dockerfile b/services/places365-scene-recognition/Dockerfile
index 74839af..77826d4 100755
--- a/services/places365-scene-recognition/Dockerfile
+++ b/services/places365-scene-recognition/Dockerfile
@@ -26,7 +26,7 @@ RUN apt-get update && \
     pip install --upgrade pip
 
 # Installing SNET Daemon
-RUN SNETD_GIT_VERSION=`curl -s https://api.github.com/repos/singnet/snet-daemon/releases/latest | grep -oP '"tag_name": "\K(.*)(?=")' || echo "v3.1.3"` && \
+RUN SNETD_GIT_VERSION=`curl -s https://api.github.com/repos/singnet/snet-daemon/releases/latest | grep -oP '"tag_name": "\K(.*)(?=")' || echo "v3.1.6"` && \
     SNETD_VERSION=${snetd_version:-${SNETD_GIT_VERSION}} && \
     cd /tmp && \
     wget https://github.com/singnet/snet-daemon/releases/download/${SNETD_VERSION}/snet-daemon-${SNETD_VERSION}-linux-amd64.tar.gz && \
diff --git a/services/places365-scene-recognition/README.md b/services/places365-scene-recognition/README.md
index 5b985e4..ec5b271 100644
--- a/services/places365-scene-recognition/README.md
+++ b/services/places365-scene-recognition/README.md
@@ -36,7 +36,6 @@ Create `SNET Daemon`'s config JSON file (`snetd.config.json`).
    "DAEMON_END_POINT": "DAEMON_HOST:DAEMON_PORT",
    "IPFS_END_POINT": "http://ipfs.singularitynet.io:80",
    "BLOCKCHAIN_NETWORK_SELECTED": "BLOCKCHAIN_NETWORK",
-   "PASSTHROUGH_ENABLED": true,
    "PASSTHROUGH_ENDPOINT": "SERVICE_GRPC_HOST:SERVICE_GRPC_PORT",  
    "ORGANIZATION_NAME": "ORGANIZATION_NAME",
    "SERVICE_NAME": "SERVICE_NAME",
@@ -65,7 +64,6 @@ $ cat snetd.config.json
    "DAEMON_END_POINT": "http://54.203.198.53:7019",
    "IPFS_END_POINT": "http://ipfs.singularitynet.io:80",
    "BLOCKCHAIN_NETWORK_SELECTED": "ropsten",
-   "PASSTHROUGH_ENABLED": true,
    "PASSTHROUGH_ENDPOINT": "http://localhost:7018",
    "ORGANIZATION_NAME": "snet",
    "SERVICE_NAME": "places365-scene-recognition",
@@ -87,7 +85,7 @@ $ sh buildproto.sh
 ```
 Start the service and its respective instance of `SNET Daemon` at the ports specified above:
 ```
-$ python3 run_object_detection_service.py
+$ python3 run_service.py
 ```
 
 ### Calling the service:
@@ -105,7 +103,7 @@ $ python3 run_object_detection_service.py
 
 Run the test script provided. You can input the gRPC request fields manually or use the flag `auto` to automatically fill them in using default values.
 ```
-$ python3 test_scene_recognition_service.py auto
+$ python3 test_service.py auto
 ...
 TEST RESULT: 
 io: outdoor
diff --git a/services/places365-scene-recognition/requirements.txt b/services/places365-scene-recognition/requirements.txt
index 2fa0601..288682a 100644
--- a/services/places365-scene-recognition/requirements.txt
+++ b/services/places365-scene-recognition/requirements.txt
@@ -1,6 +1,6 @@
 grpcio==1.14.2
 grpcio-tools==1.14.1
 opencv-python==3.4.4.19
-Pillow==6.2.0
+Pillow==6.2.2
 scipy==1.1.0
 numpy==1.15.1
\ No newline at end of file
diff --git a/services/places365-scene-recognition/run_scene_recognition_service.py b/services/places365-scene-recognition/run_service.py
similarity index 100%
rename from services/places365-scene-recognition/run_scene_recognition_service.py
rename to services/places365-scene-recognition/run_service.py
diff --git a/services/places365-scene-recognition/service/scene_recognition.py b/services/places365-scene-recognition/service/scene_recognition.py
index e9a1133..43c1abd 100644
--- a/services/places365-scene-recognition/service/scene_recognition.py
+++ b/services/places365-scene-recognition/service/scene_recognition.py
@@ -13,7 +13,6 @@
 from PIL import Image
 import logging
 import service
-from service.serviceUtils import jpg_to_base64
 from service import wideresnet as wideresnet
 
 logging.basicConfig(
@@ -149,57 +148,61 @@ def recognize(self, input_image_path, predict, cam_path):
         """ Performs scene recognition: predicts scene attributes, category, indoor/outdoor and class activation
         mappings. """
         log.debug("Input image path : {}".format(input_image_path))
-        result = {}
-
-        # load the test image
-        img = Image.open(input_image_path)
-        input_img = V(self.tf(img).unsqueeze(0))
-
-        # forward pass
-        logit = self.model.forward(input_img)
-        h_x = F.softmax(logit, 1).data.squeeze()
-        probs, idx = h_x.sort(0, True)
-        probs = probs.numpy()
-        idx = idx.numpy()
-
-        log.debug('RESULT ON ' + input_image_path)
-
-        # Output the IO prediction
-        if "io" in predict:
-            io_image = np.mean(self.labels_io[idx[:10]])  # vote for the indoor or outdoor
-            if io_image < 0.5:
-                result["io"] = "indoor"
-                log.debug('--TYPE OF ENVIRONMENT: indoor')
-            else:
-                result["io"] = "outdoor"
-                log.debug('--TYPE OF ENVIRONMENT: outdoor')
-
-        # Output the prediction of scene category
-        if "categories" in predict:
-            result["categories"] = ""
-            log.debug('--SCENE CATEGORIES:')
-            for i in range(0, 5):
-                category = ' {:.3f} -> {},'.format(probs[i], self.classes[idx[i]])
-                result["categories"] += category
-                log.debug(category)
-
-        # output the scene attributes
-        if "attributes" in predict:
-            responses_attribute = self.w_attribute.dot(self.features_blobs[1])
-            idx_a = np.argsort(responses_attribute)
-            log.debug('--SCENE ATTRIBUTES:')
-            attributes = ', '.join([self.labels_attribute[idx_a[i]] for i in range(-1, -10, -1)])
-            result["attributes"] = attributes
-            log.debug(attributes)
-
-        # generate class activation mapping
-        if "cam" in predict:
-            cams = self.return_cam(self.features_blobs[0], self.weight_softmax, [idx[0]])
-            img = cv2.imread(input_image_path)
-            height, width, _ = img.shape
-            heatmap = cv2.applyColorMap(cv2.resize(cams[0], (width, height)), cv2.COLORMAP_JET)
-            cam_result = heatmap * 0.4 + img * 0.5
-            cv2.imwrite(cam_path, cam_result)
-            log.debug('Class activation mapping is saved at {}'.format(cam_path))
-            result["cam"] = service.serviceUtils.jpg_to_base64(cam_path, open_file=True).decode("utf-8")
-        return result
+        result = dict()
+        try:
+            # load the test image
+            img = Image.open(input_image_path)
+            input_img = V(self.tf(img).unsqueeze(0))
+    
+            # forward pass
+            logit = self.model.forward(input_img)
+            h_x = F.softmax(logit, 1).data.squeeze()
+            probs, idx = h_x.sort(0, True)
+            probs = probs.numpy()
+            idx = idx.numpy()
+    
+            log.debug('RESULT ON ' + input_image_path)
+    
+            # Output the IO prediction
+            if "io" in predict:
+                io_image = np.mean(self.labels_io[idx[:10]])  # vote for the indoor or outdoor
+                if io_image < 0.5:
+                    result["io"] = "indoor"
+                    log.debug('--TYPE OF ENVIRONMENT: indoor')
+                else:
+                    result["io"] = "outdoor"
+                    log.debug('--TYPE OF ENVIRONMENT: outdoor')
+    
+            # Output the prediction of scene category
+            if "categories" in predict:
+                result["categories"] = ""
+                log.debug('--SCENE CATEGORIES:')
+                for i in range(0, 5):
+                    category = ' {:.3f} -> {},'.format(probs[i], self.classes[idx[i]])
+                    result["categories"] += category
+                    log.debug(category)
+    
+            # output the scene attributes
+            if "attributes" in predict:
+                responses_attribute = self.w_attribute.dot(self.features_blobs[1])
+                idx_a = np.argsort(responses_attribute)
+                log.debug('--SCENE ATTRIBUTES:')
+                attributes = ', '.join([self.labels_attribute[idx_a[i]] for i in range(-1, -10, -1)])
+                result["attributes"] = attributes
+                log.debug(attributes)
+    
+            # generate class activation mapping
+            if "cam" in predict:
+                cams = self.return_cam(self.features_blobs[0], self.weight_softmax, [idx[0]])
+                img = cv2.imread(input_image_path)
+                height, width, _ = img.shape
+                heatmap = cv2.applyColorMap(cv2.resize(cams[0], (width, height)), cv2.COLORMAP_JET)
+                cam_result = heatmap * 0.4 + img * 0.5
+                cv2.imwrite(cam_path, cam_result)
+                log.debug('Class activation mapping is saved at {}'.format(cam_path))
+                result["cam"] = service.serviceUtils.jpg_to_base64(cam_path, open_file=True).decode("utf-8")
+            return result
+        except Exception as e:
+            log.error(e)
+            result["error"] = str(e)
+            return result
diff --git a/services/places365-scene-recognition/service/scene_recognition_service.py b/services/places365-scene-recognition/service/scene_recognition_service.py
index 7410eec..5fd7729 100644
--- a/services/places365-scene-recognition/service/scene_recognition_service.py
+++ b/services/places365-scene-recognition/service/scene_recognition_service.py
@@ -90,7 +90,7 @@ def treat_inputs(self, request, arguments, created_images):
 
         return image_path, predict, file_index_str
 
-    def recognize_scene(self, request, _):
+    def recognize_scene(self, request, context):
         """Wraps the scene recognition model to make sure inputs and outputs match the service requirements."""
 
         # Store the names of the images to delete them afterwards
@@ -104,13 +104,17 @@ def recognize_scene(self, request, _):
         try:
             image_path, predict, file_index_str = self.treat_inputs(request, arguments, created_images)
         except HTTPError as e:
-            error_message = "Error downloading the input image \n" + e.read()
+            error_message = "Error downloading the input image \n" + str(e)
             log.error(error_message)
             self.result.data = error_message
+            context.set_details(error_message)
+            context.set_code(grpc.StatusCode.INTERNAL)
             return self.result
         except Exception as e:
             log.error(e)
             self.result.data = e
+            context.set_details(str(e))
+            context.set_code(grpc.StatusCode.INTERNAL)
             return self.result
 
         # Get cam (color activation mappings) file path
@@ -130,7 +134,11 @@ def recognize_scene(self, request, _):
         p.join()
 
         response = return_dict.get("response", None)
-        if not response:
+        if not response or "error" in response:
+            error_msg = response.get("error", None) if response else None
+            log.error(error_msg)
+            context.set_details(error_msg)
+            context.set_code(grpc.StatusCode.INTERNAL)
             return SceneRecognitionResult()
 
         # Prepare gRPC output message
diff --git a/services/places365-scene-recognition/snetd_configs/snetd.mainnet.json b/services/places365-scene-recognition/snetd_configs/snetd.mainnet.json
index e6de179..4a987df 100644
--- a/services/places365-scene-recognition/snetd_configs/snetd.mainnet.json
+++ b/services/places365-scene-recognition/snetd_configs/snetd.mainnet.json
@@ -1,7 +1,6 @@
 {
   "daemon_end_point": "0.0.0.0:7019",
   "ipfs_end_point": "http://ipfs.singularitynet.io:80",
-  "passthrough_enabled": true,
   "passthrough_endpoint": "http://localhost:7003",
   "blockchain_network_selected": "main",
   "organization_id": "snet",
diff --git a/services/places365-scene-recognition/snetd_configs/snetd.ropsten b/services/places365-scene-recognition/snetd_configs/snetd.ropsten
index a62a1cc..ea3faed 100644
--- a/services/places365-scene-recognition/snetd_configs/snetd.ropsten
+++ b/services/places365-scene-recognition/snetd_configs/snetd.ropsten
@@ -1,7 +1,6 @@
 {
   "daemon_end_point": "0.0.0.0:7079",
   "ipfs_end_point": "http://ipfs.singularitynet.io:80",
-  "passthrough_enabled": true,
   "passthrough_endpoint": "http://localhost:7003",
   "blockchain_network_selected": "ropsten",
   "organization_id": "snet",
diff --git a/services/places365-scene-recognition/test_scene_recognition_service.py b/services/places365-scene-recognition/test_service.py
similarity index 100%
rename from services/places365-scene-recognition/test_scene_recognition_service.py
rename to services/places365-scene-recognition/test_service.py
diff --git a/services/pneumonia-diagnosis/Dockerfile b/services/pneumonia-diagnosis/Dockerfile
index da0adcb..bf643ec 100644
--- a/services/pneumonia-diagnosis/Dockerfile
+++ b/services/pneumonia-diagnosis/Dockerfile
@@ -25,7 +25,7 @@ RUN apt-get install -y libsm6 libxext6 libxrender-dev
 RUN apt-get install -y python3 python3-pip
 
 # Installing SNET Daemon
-RUN SNETD_GIT_VERSION=`curl -s https://api.github.com/repos/singnet/snet-daemon/releases/latest | grep -oP '"tag_name": "\K(.*)(?=")' || echo "v3.1.3"` && \
+RUN SNETD_GIT_VERSION=`curl -s https://api.github.com/repos/singnet/snet-daemon/releases/latest | grep -oP '"tag_name": "\K(.*)(?=")' || echo "v3.1.6"` && \
     SNETD_VERSION=${snetd_version:-${SNETD_GIT_VERSION}} && \
     cd /tmp && \
     wget https://github.com/singnet/snet-daemon/releases/download/${SNETD_VERSION}/snet-daemon-${SNETD_VERSION}-linux-amd64.tar.gz && \
diff --git a/services/pneumonia-diagnosis/README.md b/services/pneumonia-diagnosis/README.md
index 7b0b404..8530bb2 100644
--- a/services/pneumonia-diagnosis/README.md
+++ b/services/pneumonia-diagnosis/README.md
@@ -47,7 +47,6 @@ Create the `SNET Daemon`'s config JSON file (`snetd.config.json`).
    "DAEMON_END_POINT": "DAEMON_HOST:DAEMON_PORT",
    "IPFS_END_POINT": "http://ipfs.singularitynet.io:80",
    "BLOCKCHAIN_NETWORK_SELECTED": "BLOCKCHAIN_NETWORK",
-   "PASSTHROUGH_ENABLED": true,
    "PASSTHROUGH_ENDPOINT": "http://SERVICE_GRPC_HOST:SERVICE_GRPC_PORT",  
    "ORGANIZATION_ID": "ORGANIZATION_ID",
    "SERVICE_ID": "SERVICE_ID",
@@ -68,7 +67,6 @@ $ cat snetd.config.json
    "DAEMON_END_POINT": "0.0.0.0:7062",
    "IPFS_END_POINT": "http://ipfs.singularitynet.io:80",
    "BLOCKCHAIN_NETWORK_SELECTED": "ropsten",
-   "PASSTHROUGH_ENABLED": true,
    "PASSTHROUGH_ENDPOINT": "http://localhost:7003",
    "ORGANIZATION_ID": "snet",
    "SERVICE_ID": "pneumonia-diagnosis",
@@ -93,7 +91,7 @@ $ sh buildproto.sh
 ```
 Start the service and `SNET Daemon`:
 ```
-$ python3 run_pneumonia_diagnosis_service.py
+$ python3 run_service.py
 ```
 
 ### Calling the service:
@@ -104,7 +102,7 @@ Inputs:
 Local (testing purpose):
 
 ```
-$ python3 test_pneumonia_diagnosis_service.py 
+$ python3 test_service.py 
 Endpoint (localhost:7003): 
 Method (check): 
 Image (Link): https://snet-models.s3.amazonaws.com/bh/PneumoniaDiagnosis/diagnosis_normal_1.jpg
@@ -112,7 +110,7 @@ Image (Link): https://snet-models.s3.amazonaws.com/bh/PneumoniaDiagnosis/diagnos
 Normal
 
 
-$ python3 test_pneumonia_diagnosis_service.py 
+$ python3 test_service.py 
 Endpoint (localhost:7003): 
 Method (check): 
 Image (Link): https://snet-models.s3.amazonaws.com/bh/PneumoniaDiagnosis/diagnosis_pneumonia.jpg
diff --git a/services/pneumonia-diagnosis/run_pneumonia_diagnosis_service.py b/services/pneumonia-diagnosis/run_service.py
similarity index 100%
rename from services/pneumonia-diagnosis/run_pneumonia_diagnosis_service.py
rename to services/pneumonia-diagnosis/run_service.py
diff --git a/services/pneumonia-diagnosis/snetd_configs/snetd.mainnet.json b/services/pneumonia-diagnosis/snetd_configs/snetd.mainnet.json
index 3b3048c..3292a8f 100644
--- a/services/pneumonia-diagnosis/snetd_configs/snetd.mainnet.json
+++ b/services/pneumonia-diagnosis/snetd_configs/snetd.mainnet.json
@@ -1,7 +1,6 @@
 {
   "daemon_end_point": "0.0.0.0:7072",
   "ipfs_end_point": "http://ipfs.singularitynet.io:80",
-  "passthrough_enabled": true,
   "passthrough_endpoint": "http://localhost:7003",
   "blockchain_network_selected": "main",
   "organization_id": "snet",
diff --git a/services/pneumonia-diagnosis/snetd_configs/snetd.ropsten b/services/pneumonia-diagnosis/snetd_configs/snetd.ropsten
index 3f1c872..305b729 100644
--- a/services/pneumonia-diagnosis/snetd_configs/snetd.ropsten
+++ b/services/pneumonia-diagnosis/snetd_configs/snetd.ropsten
@@ -1,7 +1,6 @@
 {
   "daemon_end_point": "0.0.0.0:7062",
   "ipfs_end_point": "http://ipfs.singularitynet.io:80",
-  "passthrough_enabled": true,
   "passthrough_endpoint": "http://localhost:7003",
   "blockchain_network_selected": "ropsten",
   "organization_id": "snet",
diff --git a/services/pneumonia-diagnosis/test_pneumonia_diagnosis_service.py b/services/pneumonia-diagnosis/test_service.py
similarity index 100%
rename from services/pneumonia-diagnosis/test_pneumonia_diagnosis_service.py
rename to services/pneumonia-diagnosis/test_service.py
diff --git a/services/real-time-voice-cloning/Dockerfile b/services/real-time-voice-cloning/Dockerfile
index bb885a9..dddef80 100644
--- a/services/real-time-voice-cloning/Dockerfile
+++ b/services/real-time-voice-cloning/Dockerfile
@@ -26,7 +26,7 @@ RUN apt-get clean && \
     apt-get -y autoremove
 
 # Installing SNET Daemon
-RUN SNETD_GIT_VERSION=`curl -s https://api.github.com/repos/singnet/snet-daemon/releases/latest | grep -oP '"tag_name": "\K(.*)(?=")' || echo "v3.1.3"` && \
+RUN SNETD_GIT_VERSION=`curl -s https://api.github.com/repos/singnet/snet-daemon/releases/latest | grep -oP '"tag_name": "\K(.*)(?=")' || echo "v3.1.6"` && \
     SNETD_VERSION=${snetd_version:-${SNETD_GIT_VERSION}} && \
     cd /tmp && \
     wget https://github.com/singnet/snet-daemon/releases/download/${SNETD_VERSION}/snet-daemon-${SNETD_VERSION}-linux-amd64.tar.gz && \
diff --git a/services/real-time-voice-cloning/README.md b/services/real-time-voice-cloning/README.md
index d1f1bd7..c6ed5bf 100644
--- a/services/real-time-voice-cloning/README.md
+++ b/services/real-time-voice-cloning/README.md
@@ -39,7 +39,6 @@ Create the `SNET Daemon`'s config JSON file (`snetd.config.json`).
    "DAEMON_END_POINT": "DAEMON_HOST:DAEMON_PORT",
    "IPFS_END_POINT": "http://ipfs.singularitynet.io:80",
    "BLOCKCHAIN_NETWORK_SELECTED": "BLOCKCHAIN_NETWORK",
-   "PASSTHROUGH_ENABLED": true,
    "PASSTHROUGH_ENDPOINT": "http://SERVICE_GRPC_HOST:SERVICE_GRPC_PORT",  
    "ORGANIZATION_ID": "ORGANIZATION_ID",
    "SERVICE_ID": "SERVICE_ID",
@@ -60,7 +59,6 @@ $ cat snetd.config.json
    "DAEMON_END_POINT": "0.0.0.0:7065",
    "IPFS_END_POINT": "http://ipfs.singularitynet.io:80",
    "BLOCKCHAIN_NETWORK_SELECTED": "ropsten",
-   "PASSTHROUGH_ENABLED": true,
    "PASSTHROUGH_ENDPOINT": "http://localhost:7003",
    "ORGANIZATION_ID": "snet",
    "SERVICE_ID": "real-time-voice-cloning",
@@ -85,7 +83,7 @@ $ sh buildproto.sh
 ```
 Start the service and `SNET Daemon`:
 ```
-$ python3 run_voice_cloning_service.py
+$ python3 run_service.py
 ```
 
 ### Calling the service:
@@ -97,7 +95,7 @@ Inputs:
 Local (testing purpose):
 
 ```
-$ python3 test_voice_cloning_service.py 
+$ python3 test_service.py 
 Endpoint (localhost:7003): 
 Audio (link): https://raw.githubusercontent.com/singnet/dnn-model-services/master/docs/assets/users_guide/ben_websumit19.mp3
 Sentence (~20 words): I am an artificial intelligence researcher and I would like to make the world a better place!
diff --git a/services/real-time-voice-cloning/run_voice_cloning_service.py b/services/real-time-voice-cloning/run_service.py
similarity index 100%
rename from services/real-time-voice-cloning/run_voice_cloning_service.py
rename to services/real-time-voice-cloning/run_service.py
diff --git a/services/real-time-voice-cloning/service/voice_cloning.py b/services/real-time-voice-cloning/service/voice_cloning.py
index 65d7be3..974de0a 100755
--- a/services/real-time-voice-cloning/service/voice_cloning.py
+++ b/services/real-time-voice-cloning/service/voice_cloning.py
@@ -21,7 +21,7 @@
 def clone(audio=None, audio_url=None, sentence=""):
     try:
         if not 10 <= len(sentence.split(" ")) <= 30:
-            return {"audio": b"Sentence is invalid! (length must be 10 to 30 words)"}
+            return {"error": "Sentence is invalid! (length must be 10 to 30 words)"}
         audio_data = audio
         if audio_url:
             # Link
@@ -33,7 +33,7 @@ def clone(audio=None, audio_url=None, sentence=""):
                 size = int(size) / float(1 << 20)
                 log.info("File size: {:.2f} Mb".format(size))
                 if size > 10:
-                    return {"audio": b"Input audio file is too large! (max 10Mb)"}
+                    return {"error": "Input audio file is too large! (max 10Mb)"}
                 r = requests.get(audio_url, headers=header, allow_redirects=True)
                 audio_data = r.content
             # Base64
@@ -85,7 +85,7 @@ def clone(audio=None, audio_url=None, sentence=""):
     except Exception as e:
         log.error(e)
         traceback.print_exc()
-        return {"audio": b"Fail"}
+        return {"error": "Fail"}
 
 
 def generate_uid():
diff --git a/services/real-time-voice-cloning/service/voice_cloning_service.py b/services/real-time-voice-cloning/service/voice_cloning_service.py
index 1dee04b..b4508e1 100644
--- a/services/real-time-voice-cloning/service/voice_cloning_service.py
+++ b/services/real-time-voice-cloning/service/voice_cloning_service.py
@@ -32,7 +32,7 @@ def __init__(self):
     # request: incoming data
     # context: object that provides RPC-specific information (timeout, etc).
     @staticmethod
-    def clone(request, _):
+    def clone(request, context):
         manager = multiprocessing.Manager()
         return_dict = manager.dict()
         worker = multiprocessing.Process(
@@ -42,6 +42,13 @@ def clone(request, _):
         worker.join()
     
         response = return_dict.get("response", None)
+        if not response or "error" in response:
+            error_msg = response.get("error", None) if response else None
+            log.error(error_msg)
+            context.set_details(error_msg)
+            context.set_code(grpc.StatusCode.INTERNAL)
+            return Output()
+
         log.debug("clone({},{})={}".format(request.audio_url[:10],
                                            request.sentence[:10],
                                            len(response["audio"])))
diff --git a/services/real-time-voice-cloning/snetd_configs/snetd.mainnet.json b/services/real-time-voice-cloning/snetd_configs/snetd.mainnet.json
index bdfa0eb..d5137e4 100644
--- a/services/real-time-voice-cloning/snetd_configs/snetd.mainnet.json
+++ b/services/real-time-voice-cloning/snetd_configs/snetd.mainnet.json
@@ -1,7 +1,6 @@
 {
   "daemon_end_point": "0.0.0.0:7064",
   "ipfs_end_point": "http://ipfs.singularitynet.io:80",
-  "passthrough_enabled": true,
   "passthrough_endpoint": "http://localhost:7003",
   "blockchain_network_selected": "main",
   "organization_id": "snet",
diff --git a/services/real-time-voice-cloning/snetd_configs/snetd.ropsten b/services/real-time-voice-cloning/snetd_configs/snetd.ropsten
index 627fb6b..c0488e6 100644
--- a/services/real-time-voice-cloning/snetd_configs/snetd.ropsten
+++ b/services/real-time-voice-cloning/snetd_configs/snetd.ropsten
@@ -1,7 +1,6 @@
 {
   "daemon_end_point": "0.0.0.0:7065",
   "ipfs_end_point": "http://ipfs.singularitynet.io:80",
-  "passthrough_enabled": true,
   "passthrough_endpoint": "http://localhost:7003",
   "blockchain_network_selected": "ropsten",
   "organization_id": "snet",
diff --git a/services/real-time-voice-cloning/test_voice_cloning_service.py b/services/real-time-voice-cloning/test_service.py
similarity index 100%
rename from services/real-time-voice-cloning/test_voice_cloning_service.py
rename to services/real-time-voice-cloning/test_service.py
diff --git a/services/s2vt-video-captioning/Dockerfile b/services/s2vt-video-captioning/Dockerfile
index 9b823a7..78c4ecc 100644
--- a/services/s2vt-video-captioning/Dockerfile
+++ b/services/s2vt-video-captioning/Dockerfile
@@ -24,7 +24,7 @@ RUN apt-get update && \
 RUN apt-get install -y libsm6 libxext6 libxrender-dev
 
 # Installing SNET Daemon
-RUN SNETD_GIT_VERSION=`curl -s https://api.github.com/repos/singnet/snet-daemon/releases/latest | grep -oP '"tag_name": "\K(.*)(?=")' || echo "v3.1.3"` && \
+RUN SNETD_GIT_VERSION=`curl -s https://api.github.com/repos/singnet/snet-daemon/releases/latest | grep -oP '"tag_name": "\K(.*)(?=")' || echo "v3.1.6"` && \
     SNETD_VERSION=${snetd_version:-${SNETD_GIT_VERSION}} && \
     cd /tmp && \
     wget https://github.com/singnet/snet-daemon/releases/download/${SNETD_VERSION}/snet-daemon-${SNETD_VERSION}-linux-amd64.tar.gz && \
diff --git a/services/s2vt-video-captioning/README.md b/services/s2vt-video-captioning/README.md
index 91de58f..743355b 100644
--- a/services/s2vt-video-captioning/README.md
+++ b/services/s2vt-video-captioning/README.md
@@ -67,7 +67,6 @@ Create the `SNET Daemon`'s config JSON file (`snetd.config.json`).
    "DAEMON_END_POINT": "DAEMON_HOST:DAEMON_PORT",
    "IPFS_END_POINT": "http://ipfs.singularitynet.io:80",
    "BLOCKCHAIN_NETWORK_SELECTED": "BLOCKCHAIN_NETWORK",
-   "PASSTHROUGH_ENABLED": true,
    "PASSTHROUGH_ENDPOINT": "http://SERVICE_GRPC_HOST:SERVICE_GRPC_PORT",  
    "ORGANIZATION_ID": "ORGANIZATION_ID",
    "SERVICE_ID": "SERVICE_ID",
@@ -88,7 +87,6 @@ $ cat snetd.config.json
    "DAEMON_END_POINT": "0.0.0.0:7056",
    "IPFS_END_POINT": "http://ipfs.singularitynet.io:80",
    "BLOCKCHAIN_NETWORK_SELECTED": "ropsten",
-   "PASSTHROUGH_ENABLED": true,
    "PASSTHROUGH_ENDPOINT": "http://localhost:7003",
    "ORGANIZATION_ID": "snet",
    "SERVICE_ID": "s2vt-video-captioning",
@@ -113,7 +111,7 @@ $ sh buildproto.sh
 ```
 Start the service and `SNET Daemon`:
 ```
-$ python2 run_video_cap_service.py
+$ python2 run_service.py
 ```
 
 ### Calling the service:
@@ -127,7 +125,7 @@ Inputs:
 Local (testing purpose):
 
 ```
-$ python2 test_call_video_cap_service.py 
+$ python2 test_service.py 
 Endpoint (localhost:7003): 
 Method (video_cap): 
 Url: http://crcv.ucf.edu/THUMOS14/UCF101/UCF101/v_PlayingGuitar_g05_c01.avi
diff --git a/services/s2vt-video-captioning/run_video_cap_service.py b/services/s2vt-video-captioning/run_service.py
similarity index 100%
rename from services/s2vt-video-captioning/run_video_cap_service.py
rename to services/s2vt-video-captioning/run_service.py
diff --git a/services/s2vt-video-captioning/service/video_cap_service.py b/services/s2vt-video-captioning/service/video_cap_service.py
index c2686f7..418ea10 100644
--- a/services/s2vt-video-captioning/service/video_cap_service.py
+++ b/services/s2vt-video-captioning/service/video_cap_service.py
@@ -39,7 +39,7 @@ def __init__(self):
     # The method that will be exposed to the snet-cli call command.
     # request: incoming data
     # context: object that provides RPC-specific information (timeout, etc).
-    def video_cap(self, request, _):
+    def video_cap(self, request, context):
         self.url = request.url
         self.start_time_sec = request.start_time_sec
         self.stop_time_sec = request.stop_time_sec
@@ -54,8 +54,12 @@ def video_cap(self, request, _):
         worker.join()
 
         response = return_dict.get("response", None)
-        if not response:
-            return Output(value="Fail")
+        if not response or "error" in response:
+            error_msg = response.get("error", None) if response else None
+            log.error(error_msg)
+            context.set_details(error_msg)
+            context.set_code(grpc.StatusCode.INTERNAL)
+            return Output()
         
         log.debug("video_cap({},{},{})={}".format(self.url,
                                                   self.start_time_sec,
diff --git a/services/s2vt-video-captioning/service/video_captioner.py b/services/s2vt-video-captioning/service/video_captioner.py
index 43d4e92..6f06780 100644
--- a/services/s2vt-video-captioning/service/video_captioner.py
+++ b/services/s2vt-video-captioning/service/video_captioner.py
@@ -136,11 +136,11 @@ def get_video_captions(self):
                                     result = f.readlines()
                                 self.response["Caption"] = self._create_srt(result)
             else:
-                self.response["Caption"] = self.error if self.error else "[Fail] Unexpected error!"
+                self.response["error"] = self.error if self.error else "[Fail] Unexpected error!"
 
         except Exception as e:
             log.error(e)
-            self.response["Caption"] = "Fail"
+            self.response["error"] = str(e)
 
         # Deletes video folder.
         if os.path.exists(self.video_folder):
diff --git a/services/s2vt-video-captioning/snetd_configs/snetd.mainnet.json b/services/s2vt-video-captioning/snetd_configs/snetd.mainnet.json
index d0a191a..d25f986 100644
--- a/services/s2vt-video-captioning/snetd_configs/snetd.mainnet.json
+++ b/services/s2vt-video-captioning/snetd_configs/snetd.mainnet.json
@@ -1,7 +1,6 @@
 {
   "daemon_end_point": "0.0.0.0:7006",
   "ipfs_end_point": "http://ipfs.singularitynet.io:80",
-  "passthrough_enabled": true,
   "passthrough_endpoint": "http://localhost:7003",
   "blockchain_network_selected": "main",
   "organization_id": "snet",
diff --git a/services/s2vt-video-captioning/snetd_configs/snetd.ropsten b/services/s2vt-video-captioning/snetd_configs/snetd.ropsten
index 56622be..dc3065a 100644
--- a/services/s2vt-video-captioning/snetd_configs/snetd.ropsten
+++ b/services/s2vt-video-captioning/snetd_configs/snetd.ropsten
@@ -1,7 +1,6 @@
 {
   "daemon_end_point": "0.0.0.0:7056",
   "ipfs_end_point": "http://ipfs.singularitynet.io:80",
-  "passthrough_enabled": true,
   "passthrough_endpoint": "http://localhost:7003",
   "blockchain_network_selected": "ropsten",
   "organization_id": "snet",
diff --git a/services/s2vt-video-captioning/test_video_cap_service.py b/services/s2vt-video-captioning/test_service.py
similarity index 100%
rename from services/s2vt-video-captioning/test_video_cap_service.py
rename to services/s2vt-video-captioning/test_service.py
diff --git a/services/sound-spleeter/Dockerfile b/services/sound-spleeter/Dockerfile
index 07001d5..07b468e 100644
--- a/services/sound-spleeter/Dockerfile
+++ b/services/sound-spleeter/Dockerfile
@@ -27,7 +27,7 @@ RUN apt-get clean && \
     apt-get -y autoremove
 
 # Installing SNET Daemon
-RUN SNETD_GIT_VERSION=`curl -s https://api.github.com/repos/singnet/snet-daemon/releases/latest | grep -oP '"tag_name": "\K(.*)(?=")' || echo "v3.1.3"` && \
+RUN SNETD_GIT_VERSION=`curl -s https://api.github.com/repos/singnet/snet-daemon/releases/latest | grep -oP '"tag_name": "\K(.*)(?=")' || echo "v3.1.6"` && \
     SNETD_VERSION=${snetd_version:-${SNETD_GIT_VERSION}} && \
     cd /tmp && \
     wget https://github.com/singnet/snet-daemon/releases/download/${SNETD_VERSION}/snet-daemon-${SNETD_VERSION}-linux-amd64.tar.gz && \
diff --git a/services/sound-spleeter/README.md b/services/sound-spleeter/README.md
index 1fdf51c..d73b830 100644
--- a/services/sound-spleeter/README.md
+++ b/services/sound-spleeter/README.md
@@ -36,7 +36,6 @@ Create the `SNET Daemon`'s config JSON file (`snetd.config.json`).
    "DAEMON_END_POINT": "DAEMON_HOST:DAEMON_PORT",
    "IPFS_END_POINT": "http://ipfs.singularitynet.io:80",
    "BLOCKCHAIN_NETWORK_SELECTED": "BLOCKCHAIN_NETWORK",
-   "PASSTHROUGH_ENABLED": true,
    "PASSTHROUGH_ENDPOINT": "http://SERVICE_GRPC_HOST:SERVICE_GRPC_PORT",  
    "ORGANIZATION_ID": "ORGANIZATION_ID",
    "SERVICE_ID": "SERVICE_ID",
@@ -57,7 +56,6 @@ $ cat snetd.config.json
    "DAEMON_END_POINT": "0.0.0.0:7055",
    "IPFS_END_POINT": "http://ipfs.singularitynet.io:80",
    "BLOCKCHAIN_NETWORK_SELECTED": "ropsten",
-   "PASSTHROUGH_ENABLED": true,
    "PASSTHROUGH_ENDPOINT": "http://localhost:7003",
    "ORGANIZATION_ID": "snet",
    "SERVICE_ID": "sound-spleeter",
@@ -82,7 +80,7 @@ $ sh buildproto.sh
 ```
 Start the service and `SNET Daemon`:
 ```
-$ python3 run_sound_spleeter_service.py
+$ python3 run_service.py
 ```
 
 ### Calling the service:
@@ -93,7 +91,7 @@ Inputs:
 Local (testing purpose):
 
 ```
-$ python3 test_sound_spleeter_service.py
+$ python3 test_service.py
 Endpoint (localhost:7003):
 Audio (URL): http://54.203.198.53:7000/Resources/audio_example.mp3
 {'vocals': '...', 'accomp': '...'}
diff --git a/services/sound-spleeter/run_sound_spleeter_service.py b/services/sound-spleeter/run_service.py
similarity index 100%
rename from services/sound-spleeter/run_sound_spleeter_service.py
rename to services/sound-spleeter/run_service.py
diff --git a/services/sound-spleeter/service/sound_spleeter.py b/services/sound-spleeter/service/sound_spleeter.py
index 8cd82d9..b3174e2 100644
--- a/services/sound-spleeter/service/sound_spleeter.py
+++ b/services/sound-spleeter/service/sound_spleeter.py
@@ -17,11 +17,6 @@
 
 def spleeter(audio_url=None, audio=None):
     try:
-        response = {
-            "vocals": b"Fail",
-            "accomp": b"Fail"
-        }
-
         audio_data = audio
         if audio_url:
             # Link
@@ -33,9 +28,7 @@ def spleeter(audio_url=None, audio=None):
                 size = int(size) / float(1 << 20)
                 log.info("File size: {:.2f} Mb".format(size))
                 if size > 10:
-                    response["vocals"] = b"Input audio file is too large! (max 10Mb)"
-                    response["accomp"] = b"Fail"
-                    return response
+                    return {"error": "Input audio file is too large! (max 10Mb)"}
                 r = requests.get(audio_url, headers=header, allow_redirects=True)
                 audio_data = r.content
             # Base64
@@ -72,15 +65,12 @@ def spleeter(audio_url=None, audio=None):
 
         # Deleting the files output directory
         shutil.rmtree(tmp_dir)
-
-        response["vocals"] = vocals
-        response["accomp"] = accomp
-        return response
+        return {"vocals": vocals, "accomp": accomp}
 
     except Exception as e:
         log.error(e)
         traceback.print_exc()
-        return response
+        return {"error": str(e)}
 
 
 def generate_uid():
diff --git a/services/sound-spleeter/service/sound_spleeter_service.py b/services/sound-spleeter/service/sound_spleeter_service.py
index 079562d..7fe138c 100644
--- a/services/sound-spleeter/service/sound_spleeter_service.py
+++ b/services/sound-spleeter/service/sound_spleeter_service.py
@@ -31,7 +31,7 @@ def __init__(self):
         log.debug("SoundSpleeterServicer created")
 
     @staticmethod
-    def spleeter(request, _):
+    def spleeter(request, context):
         manager = multiprocessing.Manager()
         return_dict = manager.dict()
         worker = multiprocessing.Process(
@@ -41,6 +41,13 @@ def spleeter(request, _):
         worker.join()
 
         response = return_dict.get("response", None)
+        if not response or "error" in response:
+            error_msg = response.get("error", None) if response else None
+            log.error(error_msg)
+            context.set_details(error_msg)
+            context.set_code(grpc.StatusCode.INTERNAL)
+            return Output()
+
         log.debug("clone({},{})={},{}".format(request.audio_url[:10],
                                               len(request.audio),
                                               len(response["vocals"]),
diff --git a/services/sound-spleeter/snetd_configs/snetd.mainnet.json b/services/sound-spleeter/snetd_configs/snetd.mainnet.json
index acd1a0a..2067c5b 100644
--- a/services/sound-spleeter/snetd_configs/snetd.mainnet.json
+++ b/services/sound-spleeter/snetd_configs/snetd.mainnet.json
@@ -1,7 +1,6 @@
 {
   "daemon_end_point": "0.0.0.0:7066",
   "ipfs_end_point": "http://ipfs.singularitynet.io:80",
-  "passthrough_enabled": true,
   "passthrough_endpoint": "http://localhost:7003",
   "blockchain_network_selected": "main",
   "organization_id": "snet",
diff --git a/services/sound-spleeter/snetd_configs/snetd.ropsten b/services/sound-spleeter/snetd_configs/snetd.ropsten
index fe19921..a82f8c0 100644
--- a/services/sound-spleeter/snetd_configs/snetd.ropsten
+++ b/services/sound-spleeter/snetd_configs/snetd.ropsten
@@ -1,7 +1,6 @@
 {
   "daemon_end_point": "0.0.0.0:7067",
   "ipfs_end_point": "http://ipfs.singularitynet.io:80",
-  "passthrough_enabled": true,
   "passthrough_endpoint": "http://localhost:7003",
   "blockchain_network_selected": "ropsten",
   "organization_id": "snet",
diff --git a/services/sound-spleeter/test_sound_spleeter_service.py b/services/sound-spleeter/test_service.py
similarity index 100%
rename from services/sound-spleeter/test_sound_spleeter_service.py
rename to services/sound-spleeter/test_service.py
diff --git a/services/yolov3-object-detection/Dockerfile b/services/yolov3-object-detection/Dockerfile
index bf7a320..3ba70f6 100644
--- a/services/yolov3-object-detection/Dockerfile
+++ b/services/yolov3-object-detection/Dockerfile
@@ -25,7 +25,7 @@ RUN apt-get install -y libsm6 libxext6 libxrender-dev
 RUN apt-get install -y python3 python3-pip
 
 # Installing SNET Daemon
-RUN SNETD_GIT_VERSION=`curl -s https://api.github.com/repos/singnet/snet-daemon/releases/latest | grep -oP '"tag_name": "\K(.*)(?=")' || echo "v3.1.3"` && \
+RUN SNETD_GIT_VERSION=`curl -s https://api.github.com/repos/singnet/snet-daemon/releases/latest | grep -oP '"tag_name": "\K(.*)(?=")' || echo "v3.1.6"` && \
     SNETD_VERSION=${snetd_version:-${SNETD_GIT_VERSION}} && \
     cd /tmp && \
     wget https://github.com/singnet/snet-daemon/releases/download/${SNETD_VERSION}/snet-daemon-${SNETD_VERSION}-linux-amd64.tar.gz && \
diff --git a/services/yolov3-object-detection/README.md b/services/yolov3-object-detection/README.md
index dca367b..2cf46c7 100644
--- a/services/yolov3-object-detection/README.md
+++ b/services/yolov3-object-detection/README.md
@@ -44,7 +44,6 @@ Create the `SNET Daemon`'s config JSON file (`snetd.config.json`).
    "DAEMON_END_POINT": "DAEMON_HOST:DAEMON_PORT",
    "IPFS_END_POINT": "http://ipfs.singularitynet.io:80",
    "BLOCKCHAIN_NETWORK_SELECTED": "BLOCKCHAIN_NETWORK",
-   "PASSTHROUGH_ENABLED": true,
    "PASSTHROUGH_ENDPOINT": "http://SERVICE_GRPC_HOST:SERVICE_GRPC_PORT",  
    "ORGANIZATION_ID": "ORGANIZATION_ID",
    "SERVICE_ID": "SERVICE_ID",
@@ -65,7 +64,6 @@ $ cat snetd.config.json
    "DAEMON_END_POINT": "0.0.0.0:7057",
    "IPFS_END_POINT": "http://ipfs.singularitynet.io:80",
    "BLOCKCHAIN_NETWORK_SELECTED": "ropsten",
-   "PASSTHROUGH_ENABLED": true,
    "PASSTHROUGH_ENDPOINT": "http://localhost:7003",
    "ORGANIZATION_ID": "snet",
    "SERVICE_ID": "yolov3-object-detection",
@@ -90,7 +88,7 @@ $ sh buildproto.sh
 ```
 Start the service and `SNET Daemon`:
 ```
-$ python3 run_object_detection_service.py
+$ python3 run_service.py
 ```
 
 ### Calling the service:
@@ -103,7 +101,7 @@ Inputs:
 Local (testing purpose):
 
 ```
-$ python3 test_object_detection_service.py 
+$ python3 test_service.py 
 Endpoint (localhost:7003): 
 Confidence (0.7): 
 Image (Link): http://www.reidsitaly.com/images/planning/sightseeing/calcio.jpg
diff --git a/services/yolov3-object-detection/run_object_detection_service.py b/services/yolov3-object-detection/run_service.py
similarity index 100%
rename from services/yolov3-object-detection/run_object_detection_service.py
rename to services/yolov3-object-detection/run_service.py
diff --git a/services/yolov3-object-detection/service/object_detection.py b/services/yolov3-object-detection/service/object_detection.py
index 527048e..00f2500 100755
--- a/services/yolov3-object-detection/service/object_detection.py
+++ b/services/yolov3-object-detection/service/object_detection.py
@@ -153,6 +153,7 @@ def detect(self):
                     "class_ids": [],
                     "confidences": [],
                     "img_base64": b"Fail",
+                    "error": "Fail"
                 }
 
         except Exception as e:
@@ -166,6 +167,7 @@ def detect(self):
                 "class_ids": [],
                 "confidences": [],
                 "img_base64": b"Fail",
+                "error": str(e)
             }
 
 
diff --git a/services/yolov3-object-detection/service/object_detection_service.py b/services/yolov3-object-detection/service/object_detection_service.py
index 968effc..00e1409 100644
--- a/services/yolov3-object-detection/service/object_detection_service.py
+++ b/services/yolov3-object-detection/service/object_detection_service.py
@@ -31,7 +31,7 @@ def __init__(self):
         self.confidence = "0.7"
         log.debug("ObjectDetectorServicer created")
 
-    def detect(self, request, _):
+    def detect(self, request, context):
         self.img_path = request.img_path
         self.model = request.model
         self.confidence = request.confidence
@@ -45,16 +45,20 @@ def detect(self, request, _):
         p.start()
         p.join()
 
-        json_result = return_dict.get("response", None)
-        if not json_result:
+        response = return_dict.get("response", None)
+        if not response or "error" in response:
+            error_msg = response.get("error", None) if response else None
+            log.error(error_msg)
+            context.set_details(error_msg)
+            context.set_code(grpc.StatusCode.INTERNAL)
             return Output()
 
         log.debug("detect({},{})".format(self.model, self.img_path[:50]))
-        return Output(delta_time=json_result["delta_time"],
-                      boxes=json_result["boxes"],
-                      class_ids=json_result["class_ids"],
-                      confidences=json_result["confidences"],
-                      img_base64=json_result["img_base64"])
+        return Output(delta_time=response["delta_time"],
+                      boxes=response["boxes"],
+                      class_ids=response["class_ids"],
+                      confidences=response["confidences"],
+                      img_base64=response["img_base64"])
 
 
 # The gRPC serve function.
diff --git a/services/yolov3-object-detection/snetd_configs/snetd.mainnet.json b/services/yolov3-object-detection/snetd_configs/snetd.mainnet.json
index 9afe424..79f5a20 100644
--- a/services/yolov3-object-detection/snetd_configs/snetd.mainnet.json
+++ b/services/yolov3-object-detection/snetd_configs/snetd.mainnet.json
@@ -1,7 +1,6 @@
 {
   "daemon_end_point": "0.0.0.0:7007",
   "ipfs_end_point": "http://ipfs.singularitynet.io:80",
-  "passthrough_enabled": true,
   "passthrough_endpoint": "http://localhost:7003",
   "blockchain_network_selected": "main",
   "organization_id": "snet",
diff --git a/services/yolov3-object-detection/snetd_configs/snetd.ropsten b/services/yolov3-object-detection/snetd_configs/snetd.ropsten
index 1125cd0..ff6954d 100644
--- a/services/yolov3-object-detection/snetd_configs/snetd.ropsten
+++ b/services/yolov3-object-detection/snetd_configs/snetd.ropsten
@@ -1,7 +1,6 @@
 {
   "daemon_end_point": "0.0.0.0:7057",
   "ipfs_end_point": "http://ipfs.singularitynet.io:80",
-  "passthrough_enabled": true,
   "passthrough_endpoint": "http://localhost:7003",
   "blockchain_network_selected": "ropsten",
   "organization_id": "snet",
diff --git a/services/yolov3-object-detection/test_object_detection_service.py b/services/yolov3-object-detection/test_service.py
similarity index 100%
rename from services/yolov3-object-detection/test_object_detection_service.py
rename to services/yolov3-object-detection/test_service.py
diff --git a/services/zeta36-chess-alpha-zero/Dockerfile b/services/zeta36-chess-alpha-zero/Dockerfile
index 58d6857..fdd088a 100644
--- a/services/zeta36-chess-alpha-zero/Dockerfile
+++ b/services/zeta36-chess-alpha-zero/Dockerfile
@@ -31,7 +31,7 @@ RUN cd ${SINGNET_REPOS} && \
     rm -f get-pip.py
 
 # Installing SNET Daemon
-RUN SNETD_GIT_VERSION=`curl -s https://api.github.com/repos/singnet/snet-daemon/releases/latest | grep -oP '"tag_name": "\K(.*)(?=")' || echo "v3.1.3"` && \
+RUN SNETD_GIT_VERSION=`curl -s https://api.github.com/repos/singnet/snet-daemon/releases/latest | grep -oP '"tag_name": "\K(.*)(?=")' || echo "v3.1.6"` && \
     SNETD_VERSION=${snetd_version:-${SNETD_GIT_VERSION}} && \
     cd /tmp && \
     wget https://github.com/singnet/snet-daemon/releases/download/${SNETD_VERSION}/snet-daemon-${SNETD_VERSION}-linux-amd64.tar.gz && \
diff --git a/services/zeta36-chess-alpha-zero/README.md b/services/zeta36-chess-alpha-zero/README.md
index 2212859..acc8023 100644
--- a/services/zeta36-chess-alpha-zero/README.md
+++ b/services/zeta36-chess-alpha-zero/README.md
@@ -37,7 +37,6 @@ Create the `SNET Daemon`'s config JSON file (`snetd.config.json`).
    "DAEMON_END_POINT": "DAEMON_HOST:DAEMON_PORT",
    "IPFS_END_POINT": "http://ipfs.singularitynet.io:80",
    "BLOCKCHAIN_NETWORK_SELECTED": "BLOCKCHAIN_NETWORK",
-   "PASSTHROUGH_ENABLED": true,
    "PASSTHROUGH_ENDPOINT": "http://SERVICE_GRPC_HOST:SERVICE_GRPC_PORT",  
    "ORGANIZATION_ID": "ORGANIZATION_ID",
    "SERVICE_ID": "SERVICE_ID",
@@ -58,7 +57,6 @@ $ cat snetd.config.json
    "DAEMON_END_POINT": "0.0.0.0:7058",
    "IPFS_END_POINT": "http://ipfs.singularitynet.io:80",
    "BLOCKCHAIN_NETWORK_SELECTED": "ropsten",
-   "PASSTHROUGH_ENABLED": true,
    "PASSTHROUGH_ENDPOINT": "http://localhost:7003",
    "ORGANIZATION_ID": "snet",
    "SERVICE_ID": "zeta36-chess-alpha-zero",
@@ -90,7 +88,7 @@ $ git clone https://github.com/Zeta36/chess-alpha-zero.git
 
 Start the service and `SNET Daemon`:
 ```
-$ python3.6 run_alpha_zero_service.py
+$ python3.6 run_service.py
 ```
 
 ### Calling the service:
@@ -137,7 +135,7 @@ Inputs:
 Local (testing purpose):
 
 ```
-$ python3.6 test_alpha_zero_service.py 
+$ python3.6 test_service.py 
 Endpoint (localhost:7003): 
 Method (play): 
 UID (empty): human_player
diff --git a/services/zeta36-chess-alpha-zero/run_alpha_zero_service.py b/services/zeta36-chess-alpha-zero/run_service.py
similarity index 100%
rename from services/zeta36-chess-alpha-zero/run_alpha_zero_service.py
rename to services/zeta36-chess-alpha-zero/run_service.py
diff --git a/services/zeta36-chess-alpha-zero/service/alpha_zero.py b/services/zeta36-chess-alpha-zero/service/alpha_zero.py
index dcf70b4..0f739e0 100644
--- a/services/zeta36-chess-alpha-zero/service/alpha_zero.py
+++ b/services/zeta36-chess-alpha-zero/service/alpha_zero.py
@@ -49,7 +49,7 @@ def play(self):
 		try:
 			self.alpha_player = self.create()
 			if not self.alpha_player:
-				return None, None
+				return None, {"error": "Error while creating player."}
 
 			# User move
 			self.chess_env.step(self.move)
@@ -75,6 +75,7 @@ def play(self):
 		except Exception as e:
 			self.response["status"] = "move_error"
 			self.response["board"] = pprint_board(self.chess_env.board)
+			self.response["error"] = str(e)
 			log.error("move_error: {}".format(e))
 			traceback.print_exc()
 			return self.chess_env, self.response
diff --git a/services/zeta36-chess-alpha-zero/service/alpha_zero_service.py b/services/zeta36-chess-alpha-zero/service/alpha_zero_service.py
index d90e5bd..1e2bd1f 100644
--- a/services/zeta36-chess-alpha-zero/service/alpha_zero_service.py
+++ b/services/zeta36-chess-alpha-zero/service/alpha_zero_service.py
@@ -39,12 +39,12 @@ def __init__(self):
         self.move = ""
         self.cmd = ""
         log.debug("AlphaZeroServicer created")
-    
+
     # The method that will be exposed to the snet-cli call command.
     # request: incoming data
     # context: object that provides RPC-specific information (timeout, etc).
-    def play(self, request, _):
-        
+    def play(self, request, context):
+
         try:
             # In our case, request is a Input() object (from .proto file)
             self.uid = request.uid
@@ -71,7 +71,7 @@ def play(self, request, _):
             elif self.cmd == "restart":
                 chess_env = ChessEnv().reset()
                 log.debug("CMD [restart]: {}".format(self.uid))
-            
+
             self.move = request.move
 
             manager = multiprocessing.Manager()
@@ -85,9 +85,13 @@ def play(self, request, _):
             p.join()
 
             chess_env, response = return_dict.get("response", (None, None))
-            if not response:
-                return Output(status="Fail")
-            
+            if not response or "error" in response:
+                error_msg = response.get("error", None) if response else None
+                log.error(error_msg)
+                context.set_details(error_msg)
+                context.set_code(grpc.StatusCode.INTERNAL)
+                return Output()
+
             # Game over
             if chess_env is None:
                 del CHESS_ENV_DICT[self.uid]
@@ -98,7 +102,7 @@ def play(self, request, _):
             board = ""
             for idx, line in enumerate(response["board"]):
                 board += "{}\n".format(line)
-            
+
             log.debug("play({},{}):\n{}\n{}\n{}".format(
                 self.move,
                 self.cmd,
@@ -106,7 +110,7 @@ def play(self, request, _):
                 board,
                 response["status"]))
             return Output(uid=self.uid, board=board, status=response["status"])
-        
+
         except Exception as e:
             traceback.print_exc()
             log.error(e)
diff --git a/services/zeta36-chess-alpha-zero/snetd_configs/snetd.mainnet.json b/services/zeta36-chess-alpha-zero/snetd_configs/snetd.mainnet.json
index 5e814be..ab22c70 100644
--- a/services/zeta36-chess-alpha-zero/snetd_configs/snetd.mainnet.json
+++ b/services/zeta36-chess-alpha-zero/snetd_configs/snetd.mainnet.json
@@ -1,7 +1,6 @@
 {
   "daemon_end_point": "0.0.0.0:7008",
   "ipfs_end_point": "http://ipfs.singularitynet.io:80",
-  "passthrough_enabled": true,
   "passthrough_endpoint": "http://localhost:7003",
   "blockchain_network_selected": "main",
   "organization_id": "snet",
diff --git a/services/zeta36-chess-alpha-zero/snetd_configs/snetd.ropsten b/services/zeta36-chess-alpha-zero/snetd_configs/snetd.ropsten
index 5011721..a3d4065 100644
--- a/services/zeta36-chess-alpha-zero/snetd_configs/snetd.ropsten
+++ b/services/zeta36-chess-alpha-zero/snetd_configs/snetd.ropsten
@@ -1,7 +1,6 @@
 {
   "daemon_end_point": "0.0.0.0:7058",
   "ipfs_end_point": "http://ipfs.singularitynet.io:80",
-  "passthrough_enabled": true,
   "passthrough_endpoint": "http://localhost:7003",
   "blockchain_network_selected": "ropsten",
   "organization_id": "snet",
diff --git a/services/zeta36-chess-alpha-zero/test_alpha_zero_service.py b/services/zeta36-chess-alpha-zero/test_service.py
similarity index 100%
rename from services/zeta36-chess-alpha-zero/test_alpha_zero_service.py
rename to services/zeta36-chess-alpha-zero/test_service.py
diff --git a/utils/requirements.txt b/utils/requirements.txt
index 5c1eae5..27f4896 100644
--- a/utils/requirements.txt
+++ b/utils/requirements.txt
@@ -1,4 +1,4 @@
 cntk==2.6
 opencv-python==3.4.3.18
-Pillow==6.2.0
+Pillow==6.2.2
 requests==2.20.0
\ No newline at end of file