# libtmux.common._TmuxVersionUnavailable

- **Module:** libtmux.common
- **Package:** libtmux
- **Language:** Python
- **Kind:** exception
- **Source:** https://github.com/tmux-python/libtmux/blob/38e368c11117fb4aeb2f082d552cd4f210eae06a/src/libtmux/common.py#L381
- **Bases:** [`Exception`](https://docs.python.org/3/library/exceptions.html#Exception)
- **Page:** https://libtmux.org/en/py/stable/reference/libtmux-common-_tmuxversionunavailable/

Internal signal: this tmux predates the ``-V`` flag (pre-1.7).