diff --git a/src/antares/craft/model/settings/general.py b/src/antares/craft/model/settings/general.py
index 7871c45e..de4e991b 100644
--- a/src/antares/craft/model/settings/general.py
+++ b/src/antares/craft/model/settings/general.py
@@ -10,9 +10,11 @@
 #
 # This file is part of the Antares project.
 
+import typing as t
+
 from antares.craft.tools.all_optional_meta import all_optional_model
 from antares.craft.tools.contents_tool import EnumIgnoreCase
-from pydantic import BaseModel, ConfigDict, Field
+from pydantic import BaseModel, ConfigDict, Field, field_validator
 from pydantic.alias_generators import to_camel
 
 
@@ -97,6 +99,11 @@ class DefaultGeneralParameters(BaseModel, extra="forbid", populate_by_name=True,
     mc_scenario: bool = False  # ? output/storenewset
     result_format: OutputFormat = Field(default=OutputFormat.TXT, exclude=True)
 
+    @field_validator("horizon", mode="before")
+    def transform_horizon_to_str(cls, val: t.Union[str, int, None]) -> t.Optional[str]:
+        # horizon can be an int.
+        return str(val) if val else val  # type: ignore
+
 
 @all_optional_model
 class GeneralParameters(DefaultGeneralParameters):
diff --git a/src/antares/craft/service/api_services/renewable_api.py b/src/antares/craft/service/api_services/renewable_api.py
index 7097e995..fe5b6c18 100644
--- a/src/antares/craft/service/api_services/renewable_api.py
+++ b/src/antares/craft/service/api_services/renewable_api.py
@@ -82,9 +82,21 @@ def read_renewables(
         self,
         area_id: str,
     ) -> List[RenewableCluster]:
+        """
+        read_renewables will return an error if
+        study settings renewable_generation_modelling is aggregated
+        an empty list will be returned instead
+        """
+
         url = f"{self._base_url}/studies/{self.study_id}/areas/{area_id}/clusters/renewable"
-        json_renewables = self._wrapper.get(url).json()
 
+        try:
+            json_renewables = self._wrapper.get(url).json()
+        except APIError as e:
+            if e.message == "'renewables' not a child of Input":
+                json_renewables = []
+            else:
+                raise
         renewables = []
 
         for renewable in json_renewables:
diff --git a/tests/antares/services/api_services/test_area_api.py b/tests/antares/services/api_services/test_area_api.py
index 58c5b634..fbc7fc47 100644
--- a/tests/antares/services/api_services/test_area_api.py
+++ b/tests/antares/services/api_services/test_area_api.py
@@ -391,3 +391,18 @@ def test_read_hydro(self):
             assert actual_hydro.area_id == expected_hydro.area_id
             assert actual_hydro.properties == expected_hydro.properties
             assert actual_hydro.matrices is None
+
+    def test_read_renewables_empty(self):
+        area = self.area
+        url_renewable = f"https://antares.com/api/v1/studies/{self.study_id}/areas/{area.id}/clusters/renewable"
+
+        with requests_mock.Mocker() as mocker:
+            mocker.get(
+                url_renewable,
+                status_code=404,
+                json={"description": "'renewables' not a child of Input", "exception": "ChildNotFoundError"},
+            )
+
+            actual_renewables = area.read_renewables()
+
+            assert actual_renewables == []
diff --git a/tests/integration/test_web_client.py b/tests/integration/test_web_client.py
index 2d6b3eba..d3fbfed4 100644
--- a/tests/integration/test_web_client.py
+++ b/tests/integration/test_web_client.py
@@ -504,6 +504,8 @@ def test_creation_lifecycle(self, antares_web: AntaresWebDesktop):
         # Really important note. To instance such object with value you must respect camel case.
         # Another way to do so is to instance the object and then fill its values
         new_settings.general_parameters = GeneralParameters(nbYears=4)
+        # To create a variant with horizon as string
+        new_settings.general_parameters.horizon = "2018"
         new_settings.advanced_parameters = AdvancedParameters()
         new_settings.advanced_parameters.unit_commitment_mode = UnitCommitmentMode.MILP
         new_study.update_settings(new_settings)
@@ -658,3 +660,11 @@ def test_creation_lifecycle(self, antares_web: AntaresWebDesktop):
         moved_study = read_study_api(api_config, study.service.study_id)
         assert moved_study.path == study.path
         assert moved_study.name == study.name
+
+        new_settings_aggregated = StudySettings()
+        new_settings_aggregated.advanced_parameters = AdvancedParameters()
+        new_settings_aggregated.advanced_parameters.renewable_generation_modelling = "aggregated"
+        study_aggregated = create_study_api("test_aggregated", "880", api_config, new_settings_aggregated)
+        study_aggregated.create_area("area_without_renewables")
+        #  read_study_api does not raise an error
+        read_study_api(api_config, study_aggregated.service.study_id)