[BUG] When building Langgraph agents from scratch, Using tools with Langgraph workers results in Message Stopped -> Cannot concat object and undefined about flowise HOT 11 CLOSED

PR bugfix merged, will be pushing to new releases soon!

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issue still persists on 1.8.1

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If you try modify the Worker prompt to something related to Math so that the Supervisor can correctly use the Worker, does it work?

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No luck with providing more Math related prompting. FWIW I've attached a langsmith screenshot of the worker invoking a Model with valid input (from the demos). And a 2nd screenshot (from the failing test) with no input_data to the Model. Thus the model is never called by the worker without input data.

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I have the trace here

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Same here.

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@HenryHengZJ same happening here. I asked the supervisor to return data, so it called a worker called "data-center" that has access to some custom tools that can perform a GET request. But I'm getting this error Cannot concat object and undefined

I'm using the docker version.

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Experiencing the similar issues. @HenryHengZJ can you elaborate how to craft prompts to have correct relationship between Supervisor/Workers? Or point to Langraph docs that describe correct use.

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reproduced.

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can anyone confirm if the issue persists in v1.8.1 or resolved?

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@HenryHengZJ still bugged #2557

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