> For the complete documentation index, see [llms.txt](/llms.txt).
> Markdown versions of each page are available by appending .md to any URL.

# operation_not_supported

The requested operation is not supported for this resource or its current state.

The `operation_not_supported` error occurs when you attempt an operation that is not currently supported for the given resource or its current state.

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## Details

-   **HTTP Status:** `422 Unprocessable Entity`
-   **Retryable:** No
-   **Task State:** FAILED

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## When does this occur?

This error is returned when:

-   You attempt to cancel a **self-hosted** agent run via the API (self-hosted runs must be cancelled through the hosting infrastructure)
-   You attempt to cancel a **local** agent run via the API (local runs must be cancelled from the source client)
-   You attempt to cancel a run triggered via **GitHub Actions** (these must be cancelled through the GitHub Actions workflow view)

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## Example response

```
{  "type": "/reference/api-and-sdk/troubleshooting/errors/operation-not-supported/",  "title": "Self-hosted agent runs cannot be cancelled with the API.",  "status": 422,  "instance": "/api/v1/agent/tasks/abc123/cancel",  "error": "Self-hosted agent runs cannot be cancelled with the API.",  "retryable": false}
```

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## How to resolve

1.  Check the error message to understand which operation is unsupported and why.
2.  Use the appropriate method for the operation:
    -   **Self-hosted runs** — Cancel through your hosting infrastructure.
    -   **Local runs** — Cancel from the Warp desktop app or terminal session.
    -   **GitHub Actions runs** — Cancel via the GitHub Actions workflow view.

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## Related

-   [Cloud Agents Overview](/agent-platform/cloud-agents/overview/) — How cloud agent tasks work
-   [Self-hosting](/agent-platform/cloud-agents/self-hosting/) — Self-hosted agent configuration
-   [Oz API & SDK](/reference/api-and-sdk/) — API reference for managing agent tasks