Error2 reports
Fix OutputParserException
in LangChain
✅ Solution
OutputParserException in Langchain often arises from mismatches between the LLM's generated output and the expected format defined by your OutputParser. To fix it, carefully inspect the LLM output for inconsistencies (incorrect field names, wrong data types, missing fields), and adjust either your prompt to guide the LLM to produce the correct format or modify your OutputParser to be more tolerant of variations. Consider adding error handling, such as a try-except block around the parser, to gracefully manage parsing failures.
Related Issues
Real GitHub issues where developers encountered this error:
Timeline
First reported:Nov 18, 2025
Last reported:Dec 5, 2025