> For the complete documentation index, see [llms.txt](https://rxjs.gitbook.io/rx-txjs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://rxjs.gitbook.io/rx-txjs/how-to-use-it/error-handling.md).

# Error Handling

If a component decide it has an error it reply back to world on:

```
this.mountpoint.tasks().error(new TxTasks<..>(.. I have an error ..)
```

Then the job stop it current execution and start error handling sequence. It send error message to every already called components in a backward order.

```
for (every components already called n backward order) do:
    mountpoint.tasks().error(..)
done
```

This will called the error callback on every components which need to clean up its stuff.