# tmux.ErrUnknownOption

- **Module:** tmux
- **Package:** github.com/libtmux/libtmux-go/tmux
- **Language:** Go
- **Kind:** attribute
- **Source:** https://github.com/libtmux/libtmux-go/blob/52968a3181c1c9e6d1b26c565d4b170968ae61c0/tmux/option_error.go#L15
- **Page:** https://libtmux.org/en/go/latest/reference/tmux-errunknownoption/

ErrUnknownOption identifies tmux's case-sensitive unknown-option diagnostic.