# tmuxp.exc.BeforeLoadScriptError

- **Module:** tmuxp.exc
- **Package:** tmuxp
- **Language:** Python
- **Kind:** exception
- **Source:** https://github.com/tmux-python/tmuxp/blob/153acdf6ff1268b14d3d03ed488f545a7123c8f1/src/tmuxp/exc.py#L221
- **Bases:** [`Exception`](https://docs.python.org/3/library/exceptions.html#Exception)
- **Page:** https://libtmux.org/en/py/stable/workspace/reference/tmuxp-exc-beforeloadscripterror/

Shell script execution error.

Replaces :class:`subprocess.CalledProcessError` for
:func:`tmuxp.util.run_before_script`.

## Members

### Other members

- [`__init__`](/en/py/stable/workspace/reference/tmuxp-exc-beforeloadscripterror-__init__/) (method)
- [`__str__`](/en/py/stable/workspace/reference/tmuxp-exc-beforeloadscripterror-__str__/) (method): Return shell error message.