Change8
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.

Timeline

First reported:Nov 18, 2025
Last reported:Dec 5, 2025

Need More Help?

View the full changelog and migration guides for LangChain

View LangChain Changelog