# exc.TmuxCommandError.stderrIncludes

- **Module:** exc.TmuxCommandError
- **Package:** @libtmux/libtmux
- **Language:** TypeScript
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-ts/blob/2cb93308200da38a26b59876618116850f110607/packages/libtmux/src/exc.ts#L389
- **Page:** https://libtmux.org/reference/ts/exc-tmuxcommanderror-stderrincludes/

```
exc.TmuxCommandError.stderrIncludes(phrase: : string) -> boolean
```

Whether tmux's own message contains a phrase, without message parsing at call sites.