# libtmux:unsupported-platform

- **Package:** libtmux
- **Language:** Common Lisp
- **Kind:** exception
- **Source:** https://github.com/libtmux/libtmux-lisp/blob/c2e5fc4ed3befda21f45dfa5d5868c38fd138311/src/conditions.lisp#L39
- **Public owner:** libtmux
- **Bases:** [`libtmux:libtmux-error`](/en/lisp/latest/reference/libtmux-libtmux-error/)
- **Page:** https://libtmux.org/en/lisp/latest/reference/libtmux-unsupported-platform/

The selected runtime lacks a qualified backend or required facility.
ERROR-FEATURE identifies the requirement; ERROR-CAUSE retains a failed probe
when available. OPEN-CLIENT checks the profile before resolving PROGRAM.

See also: `libtmux:error-cause`, `libtmux:error-feature`, `libtmux:open-client`.