# tmux.ErrNotInsideTmux

- **Module:** tmux
- **Package:** github.com/libtmux/libtmux-go/tmux
- **Language:** Go
- **Kind:** attribute
- **Source:** https://github.com/libtmux/libtmux-go/blob/52968a3181c1c9e6d1b26c565d4b170968ae61c0/tmux/from_env.go#L19
- **Page:** https://libtmux.org/en/go/latest/reference/tmux-errnotinsidetmux/

ErrNotInsideTmux identifies missing or malformed tmux discovery variables.