> ## Documentation Index
> Fetch the complete documentation index at: https://wb-21fd5541-docs-1917.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Does W&B use the `multiprocessing` library?

Yes, W\&B uses the `multiprocessing` library. An error message like the following indicates a possible issue:

```
An attempt has been made to start a new process before the current process 
has finished its bootstrapping phase.
```

To resolve this, add an entry point protection with `if __name__ == "__main__":`. This protection is necessary when running W\&B directly from the script.

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