agent functioncalling Run failed: Failed to transform agent message: PluginInvokeError #165

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opened 2026-02-16 10:18:18 -05:00 by yindo · 2 comments
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Originally created by @planwk on GitHub (Apr 2, 2025).

Self Checks

  • This is only for bug report, if you would like to ask a question, please head to Discussions.
  • I have searched for existing issues Dify issues & Dify Official Plugins, including closed ones.
  • I confirm that I am using English to submit this report (我已阅读并同意 Language Policy).
  • [FOR CHINESE USERS] 请务必使用英文提交 Issue,否则会被关闭。谢谢!:)
  • Please do not modify this template :) and fill in all the required fields.

Dify version

1.1.3

Plugin version

agent functioncalling JSONDecodeError

Cloud or Self Hosted

Self Hosted (Docker)

Steps to reproduce

I created an agent with the strategy of function calling. This strategy often appears before calling the tool and reports the following error:(Sometimes before, sometimes after)
Run failed: Failed to transform agent message: PluginInvokeError: {"args":{},"error_type":"JSONDecodeError","message":"Expecting ':' delimiter: line 1 column 5 (char 4)"}
The JSON format is not compliant as specified by prompts. How to solve this problem? If one wants to track more detailed information, how to set it up?Where should I add these codes? I'm deploying with Docker.

✔️ Error log

No response

Originally created by @planwk on GitHub (Apr 2, 2025). ### Self Checks - [x] This is only for bug report, if you would like to ask a question, please head to [Discussions](https://github.com/langgenius/dify/discussions/categories/general). - [x] I have searched for existing issues [Dify issues](https://github.com/langgenius/dify/issues) & [Dify Official Plugins](https://github.com/langgenius/dify-official-plugins/issues), including closed ones. - [x] I confirm that I am using English to submit this report (我已阅读并同意 [Language Policy](https://github.com/langgenius/dify/issues/1542)). - [x] [FOR CHINESE USERS] 请务必使用英文提交 Issue,否则会被关闭。谢谢!:) - [x] Please do not modify this template :) and fill in all the required fields. ### Dify version 1.1.3 ### Plugin version agent functioncalling JSONDecodeError ### Cloud or Self Hosted Self Hosted (Docker) ### Steps to reproduce I created an agent with the strategy of function calling. This strategy often appears before calling the tool and reports the following error:(Sometimes before, sometimes after) Run failed: Failed to transform agent message: PluginInvokeError: {"args":{},"error_type":"JSONDecodeError","message":"Expecting ':' delimiter: line 1 column 5 (char 4)"} The JSON format is not compliant as specified by prompts. How to solve this problem? If one wants to track more detailed information, how to set it up?Where should I add these codes? I'm deploying with Docker. ### ✔️ Error log _No response_
yindo added the bug label 2026-02-16 10:18:18 -05:00
yindo closed this issue 2026-02-16 10:18:18 -05:00
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Owner

@leslie2046 commented on GitHub (Apr 2, 2025):

@planwk Which model and provider do you use?Can you take a screenshot ?

@leslie2046 commented on GitHub (Apr 2, 2025): @planwk Which model and provider do you use?Can you take a screenshot ?
Author
Owner

@junjiem commented on GitHub (Apr 2, 2025):

Same #636

@junjiem commented on GitHub (Apr 2, 2025): Same #636
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Reference: langgenius/dify-official-plugins#165