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LangChain Forum - Topics tagged langsmith-studio

Production use of PostgresSaver: service-owned migrations and checkpoint retention in Node.js AttributeError: 'AsyncSandboxClient' object has no attribute 'get_template' reasoning_content visible in LangSmith when using langgraph up but not in standalone Python Unable to delete runs from annotation queue Incorrect `reasoning_effort` options in the UI Unexpected latency in minimal Deep Agent setup (create_deep_agent) + confusing @traceable runs LangSmith Studio file upload with Deep Agents causing OpenAI 400 error Why can't my 'langgraph cli' load 'checkpointer' TypeError: Type is not JSON serializable: ProxyUser Langsmith Stream Issues How to use another model in the langsmith Agent Builder UI? # [Bug/Question] Runtime Context Not Working in Deployed LangSmith Agent - Headers and Config Stripped Alert notifications not triggering for tag-based Parallel Test Scenarios vs OpenAI Rate Limits Unplanned triggering of “PII detection” when launching the agent in self-hosted LangSmith Studio can't connect to self-hosted LangGraph server on Railway - "origin is not allowed" POSTGRES_URI_CUSTOM is ignored by LangGraph runtime; runtime always falls back to in-memory Langsmith Studio not showing state schema Image registration issue Manager graph does not get the header despite adding the custom heade in langgraph.json Feedback request: LangGraph + Laravel workflow to auto-fill form fields from a PDF diagram Local server setup failed LangGraph CLI treats InjectedState as required tool parameter and fails the validation Support passing runtime context in Send API Does langGraph-studio not support user custom type? How to get the Original Tool Call Output in the agent? How to Pass Runtime Data from SDK to LangGraph Nodes Without Polluting State? Question: Custom datasets inside LangGraph platform DBs How can I properly integrate open-deep-research package to my existing backend? Studio not recognizing my custom inputs
InvalidUpdateError: Node __copy__ does not exist - LangGr...
2025-09-16 · via LangChain Forum - Topics tagged langsmith-studio

Description: I’m encountering a persistent InvalidUpdateError when attempting to update thread state in LangGraph API v0.4.20. The error occurs during state updates and suggests that a node named __copy__ doesn’t exist in my graph definition. This is happening with langgraph dev –allow-blocking and i put some multiple inputs in studio Error Details: langgraph.errors.InvalidUpdateError: Node __copy__ does not exist Stack Trace Context: Error occurs in graph.aupdate_state() → abulk_update_st...