{"record":{"id":"a184a503c460b06a","repo":"langchain-ai/langgraph","slug":"remotegraph-stream-events-version-v3-does-not-s","errorCode":null,"errorMessage":"RemoteGraph.stream_events(version='v3') does not support `{name}=`.","messagePattern":"RemoteGraph\\.stream_events\\(version='v3'\\) does not support `(.+?)=`\\.","errorType":"exception","errorClass":"NotImplementedError","httpStatus":null,"severity":"error","filePath":"libs/langgraph/langgraph/pregel/remote.py","lineNumber":212,"sourceCode":"\n    def _reject_v3_unsupported(\n        self,\n        *,\n        control: Any,\n        transformers: Any,\n        interrupt_before: Any,\n        interrupt_after: Any,\n        extra_kwargs: dict[str, Any],\n    ) -> None:\n        \"\"\"Raise NotImplementedError for kwargs unsupported by the v3 streaming path.\"\"\"\n        for name, value in (\n            (\"control\", control),\n            (\"transformers\", transformers),\n            (\"interrupt_before\", interrupt_before),\n            (\"interrupt_after\", interrupt_after),\n        ):\n            if value:\n                raise NotImplementedError(\n                    f\"RemoteGraph.stream_events(version='v3') does not support `{name}=`.\"\n                )\n        unknown = set(extra_kwargs) - _V3_SUPPORTED_KWARGS\n        if unknown:\n            raise NotImplementedError(\n                f\"RemoteGraph.stream_events(version='v3') does not support \"\n                f\"the following kwargs: {sorted(unknown)!r}. \"\n                f\"Supported: {sorted(_V3_SUPPORTED_KWARGS)!r}.\"\n            )\n\n    def copy(self, update: dict[str, Any]) -> Self:\n        attrs = {**self.__dict__, **update}\n        return self.__class__(attrs.pop(\"assistant_id\"), **attrs)\n\n    def with_config(self, config: RunnableConfig | None = None, **kwargs: Any) -> Self:\n        return self.copy(\n            {\"config\": merge_configs(self.config, config, cast(RunnableConfig, kwargs))}\n        )","sourceCodeStart":194,"sourceCodeEnd":230,"githubUrl":"https://github.com/langchain-ai/langgraph/blob/38031739e551638e373fb553453256c23feeb41f/libs/langgraph/langgraph/pregel/remote.py#L194-L230","documentation":"Error \"RemoteGraph.stream_events(version='v3') does not support `{name}=`.\" thrown in langchain-ai/langgraph.","triggerScenarios":"Thrown at libs/langgraph/langgraph/pregel/remote.py:212 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"38031739e551638e373fb553453256c23feeb41f","analyzedAt":"2026-08-26T18:02:49.312Z","schemaVersion":2},"datasetVersion":"2026-08-26T21:11:00.512Z"}