# libtmux::LookupParseError::unknown_lookup

- **Module:** libtmux::LookupParseError
- **Package:** libtmux-cxx
- **Language:** C++
- **Kind:** constant
- **Source:** https://github.com/libtmux/libtmux-cxx/blob/393d4b0ad666f18a6581f1eb281741a75a7503f0/include/libtmux/legacy_lookup.hpp#L20
- **Page:** https://libtmux.org/en/cxx/latest/reference/libtmux-lookupparseerror-unknown_lookup/