# libtmux::KeyError

- **Module:** libtmux
- **Package:** libtmux-cxx
- **Language:** C++
- **Kind:** enum
- **Source:** https://github.com/libtmux/libtmux-cxx/blob/393d4b0ad666f18a6581f1eb281741a75a7503f0/include/libtmux/keys.hpp#L23
- **Page:** https://libtmux.org/en/cxx/latest/reference/libtmux-keyerror/

Why a key name could not be resolved to something tmux accepts.

## Members

- `empty` (constant)
- `unknown_name` (constant)