# error.ServerConfigurationErrorKind.NotInsideTmux

- **Module:** error.ServerConfigurationErrorKind
- **Package:** libtmux
- **Language:** Rust
- **Kind:** constant
- **Source:** https://github.com/libtmux/libtmux-rs/blob/8a648c0894dfffc9303583f753b6c8ae01f2fe76/crates/libtmux/src/error.rs#L65
- **Page:** https://libtmux.org/reference/rs/error-serverconfigurationerrorkind-notinsidetmux/

There is no `TMUX` variable, so this process is not inside tmux.

Distinct from [`Self::MalformedTmuxVariable`], which means the
variable is there and does not say what tmux says: the first is an
ordinary state a caller may branch on, the second is a broken
environment worth reporting.