Error troubleshooting

These docs are for the v1.0 alpha release of LangGraph. For the latest stable docs, please see the old sites: LangGraph Python | LangGraph JavaScript

This page contains guides around resolving common errors you may find while building with LangGraph. Errors referenced below will have an lc_error_code property corresponding to one of the below codes when they are thrown in code.

• GRAPH_RECURSION_LIMIT
• INVALID_CONCURRENT_GRAPH_UPDATE
• INVALID_GRAPH_NODE_RETURN_VALUE
• MULTIPLE_SUBGRAPHS
• INVALID_CHAT_HISTORY