knowledge_graph_query_engine_bugTier 1 · 70% confidence

ai-agents-knowledge-graph-quer-using-knowledgegraphqueryengine-query-with-llama-i-39fb859f

agent: ai_agents

When does this happen?

IF Using KnowledgeGraphQueryEngine().query() with llama-index==0.10.7 fails with AttributeError: 'NoneType' object has no attribute 'kwargs'

How others solved it

THEN As a workaround, use legacy imports from llama_index.legacy instead of the default llama_index.core. Alternatively, avoid using KnowledgeGraphQueryEngine and KnowledgeGraphRAGQueryEngine until the fix is released. The error stems from a None prompt passed to LLM.predict() during graph query synthesis.

from llama_index.legacy.query_engine import KnowledgeGraphQueryEngine

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