# libtmux.Server.raise_if_dead

- **Module:** libtmux.Server
- **Package:** libtmux
- **Language:** Python
- **Kind:** method
- **Source:** https://github.com/tmux-python/libtmux/blob/036c521c4b83ce6e434eb50afe2a0d08a6a05e46/src/libtmux/server.py#L302
- **Page:** https://libtmux.org/reference/py/libtmux-server-raise_if_dead/

```
libtmux.Server.raise_if_dead(self) -> None
```

Raise if server not connected.

## Raises

- `exc.TmuxCommandNotFound` — When the tmux binary cannot be found or executed.
- `subprocess.CalledProcessError` — When the tmux server is not running (non-zero exit from
``list-sessions``).
- `>>> tmux = Server(socket_name="no_exist")`
- `...     tmux.raise_if_dead()`
- `...     print(type(e))`
- `<class 'subprocess.CalledProcessError'>`