[BUG] Error: '\nt\nu\np\nl\ne\n_\nd\ne\nl\ni\nm\ni\nt\ne\nr\n'

[gutama]

Description

I use ollama for llm and embedding lightrag, all the test connection is fine.
when I upload text file
it can do chunking and generating embedding
but cannot do entity and relationship extraction

the error was
[GraphRAG] Creating index... This can take a long time.
[GraphRAG] Indexed 0 / 1 documents.
Error: '\nt\nu\np\nl\ne\n_\nd\ne\nl\ni\nm\ni\nt\ne\nr\n'

I don't have any other error info to solve the issue

Reproduction steps

Adding documents to doc store
indexing step took 0.11500287055969238
GraphRAG embedding dim 1024
Indexing GraphRAG with LLM ChatOpenAI(api_key=ollama, base_url=http://localhos..., frequency_penalty=None, logit_bias=None, logprobs=None, max_retries=None, max_retries_=2, max_tokens=None, model=granite3.1-dense, n=1, organization=None, presence_penalty=None, stop=None, temperature=None, timeout=None, tool_choice=None, tools=None, top_logprobs=None, top_p=None) and Embedding OpenAIEmbeddings(api_key=ollama, base_url=http://localhos..., context_length=None, dimensions=None, max_retries=None, max_retries_=2, model=bge-m3, organization=None, timeout=None)...
Chunking documents: 100%|████████████████████████████████████████████████████| 1/1 [00:00<00:00, 10.77doc/s]
Generating embeddings: 100%|███████████████████████████████████████████████| 4/4 [00:15<00:00,  3.76s/batch]
use_quick_index_mode False
reader_mode default
Chunk size: None, chunk overlap: None
Using reader TxtReader()
Got 0 page thumbnails
Adding documents to doc store
indexing step took 0.10607624053955078
GraphRAG embedding dim 768
Indexing GraphRAG with LLM ChatOpenAI(api_key=ollama, base_url=http://localhos..., frequency_penalty=None, logit_bias=None, logprobs=None, max_retries=None, max_retries_=2, max_tokens=None, model=granite3.1-dense, n=1, organization=None, presence_penalty=None, stop=None, temperature=None, timeout=None, tool_choice=None, tools=None, top_logprobs=None, top_p=None) and Embedding OpenAIEmbeddings(api_key=ollama, base_url=http://localhos..., context_length=None, dimensions=None, max_retries=None, max_retries_=2, model=nomic-embed-text, organization=None, timeout=None)...
Chunking documents: 100%|████████████████████████████████████████████████████| 1/1 [00:00<00:00, 11.83doc/s]
Generating embeddings: 100%|███████████████████████████████████████████████| 4/4 [00:11<00:00,  2.92s/batch]
use_quick_index_mode False
reader_mode default
Chunk size: None, chunk overlap: None
Using reader TxtReader()
Got 0 page thumbnails
Adding documents to doc store
indexing step took 0.11184024810791016
GraphRAG embedding dim 768
Indexing GraphRAG with LLM ChatOpenAI(api_key=ollama, base_url=http://localhos..., frequency_penalty=None, logit_bias=None, logprobs=None, max_retries=None, max_retries_=2, max_tokens=None, model=granite3.1-dense, n=1, organization=None, presence_penalty=None, stop=None, temperature=None, timeout=None, tool_choice=None, tools=None, top_logprobs=None, top_p=None) and Embedding OpenAIEmbeddings(api_key=ollama, base_url=http://localhos..., context_length=None, dimensions=None, max_retries=None, max_retries_=2, model=nomic-embed-tex..., organization=None, timeout=None)...
Chunking documents: 100%|████████████████████████████████████████████████████| 1/1 [00:00<00:00, 11.48doc/s]
Generating embeddings: 100%|███████████████████████████████████████████████| 4/4 [00:11<00:00,  2.92s/batch]

Screenshots

![image](https://github.com/user-attachments/assets/19a684cd-fb7c-432c-a9d8-a86cd353cea3)


![image](https://github.com/user-attachments/assets/7dcd0ba2-4640-4ffe-a783-c2e468bbf80f)

Logs

No response

Browsers

No response

OS

No response

Additional information

[gutama]

I clean up all the ktem_app_data folder. It is running albeit very long time and didn't extract any relationship.
Is there anything I missed?

---

Extracting entities from chunks: 100%|████████████████████████████████| 98/98 [3:12:57<00:00, 118.14s/chunk]
Inserting entities: 100%|████████████████████████████████████████████████| 4/4 [00:00<00:00, 210.52entity/s]
Inserting relationships: 0relationship [00:00, ?relationship/s]
2025-01-02T14:19:26.049446Z [warning ] Didn't extract any relationships asctime=2025-01-02 21:19:26,045 lineno=427 message=Didn't extract any relationships module=lightrag
Generating embeddings: 100%|███████████████████████████████████████████████| 1/1 [00:13<00:00, 13.96s/batch]
2025-01-02T14:19:40.017763Z [warning ] You insert an empty data to vector DB asctime=2025-01-02 21:19:40,017 lineno=85 message=You insert an empty data to vector DB module=lightrag