agent_parsing_errorTier 1 · 70% confidence

ai-agents-agent-parsing-error-langchain-agents-e-g-pandas-dataframe-agent-sql-ag-103e9c89

agent: ai_agents

When does this happen?

IF LangChain site_1 (e.g., pandas DataFrame agent, SQL agent, OpenAPI agent) throw 'An output parsing error occurred' and suggest passing handle_parsing_errors=True even when the flag is already set.

How others solved it

THEN Ensure handle_parsing_errors is passed correctly: either as a direct argument to agent constructors like create_pandas_dataframe_agent or via agent_executor_kwargs={'handle_parsing_errors': True}. Additionally, modify the agent's prompt template to enforce that every 'Thought:' is followed by 'Action:' and 'Action Input:' or 'Final Answer:' to reduce malformed LLM outputs. Upgrade to the latest LangChain version to avoid known bugs.

agent = create_pandas_dataframe_agent(llm, df, handle_parsing_errors=True, verbose=True, max_iterations=15)  # Direct argument
# Alternative via agent_executor_kwargs:
# agent = create_sql_agent(llm, db, agent_executor_kwargs={'handle_parsing_errors': True})

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