# Conversation API no tool output

**URL:** <https://community.openai.com/t/conversation-api-no-tool-output/1357627>\
**Category:** API\
**Tags:** gpt-5, responses, conversation\
**Created:** [September 11, 2025, 11:27pm UTC](https://community.openai.com/t/conversation-api-no-tool-output/1357627 "2025-09-11T23:27:56Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![guptaa.pavan](https://sea2.discourse-cdn.com/openai1/user_avatar/community.openai.com/guptaa.pavan/32/542361_2.png) [@guptaa.pavan](https://community.openai.com/u/guptaa.pavan)\
**Post date:** [September 11, 2025, 11:27pm UTC](https://community.openai.com/t/conversation-api-no-tool-output/1357627/1 "2025-09-11T23:27:56Z")

</div>

Currently I create a new conversation and associate with my responses.create. I have around 15 function calls, let says during the processing if one tool fails. I get this error

Error: 400 No tool output found for function call call\_sZUx4U3b0WErUN0e2TyXYQMI.

```
at APIError.generate (/root/gitlocal/todobuddy/node_modules/openai/core/error.js:45:20)

at OpenAI.makeStatusError (/root/gitlocal/todobuddy/node_modules/openai/client.js:163:32)

at OpenAI.makeRequest (/root/gitlocal/todobuddy/node_modules/openai/client.js:331:30)

at process.processTicksAndRejections (node:internal/process/task_queues:105:5)

```

I am not able to make any more conversations there after, I have delete the conversation and restart. How can I get away from this issue