execution problem

### Custom Node Testing

- [ ] I have tried disabling custom nodes and the issue persists (see [how to disable custom nodes](https://docs.comfy.org/troubleshooting/custom-node-issues#step-1%3A-test-with-all-custom-nodes-disabled) if you need help)

### Expected Behavior

suddenly execution stopped

### Actual Behavior

prompt failed

### Steps to Reproduce

.

### Debug Logs

```powershell
.
```

### Other

.

The issue names no source file, test, entry point, reproducible steps, or useful debug log. Start by following the linked custom-node troubleshooting guidance and reproducing the failed prompt with custom nodes disabled; the issue is ready when the execution failure has concrete steps, logs, and an identified area to investigate.

Written by the indexing model from the issue text.