# io.github.libtmux.exception.UnsupportedFeatureException

- **Module:** io.github.libtmux.exception
- **Package:** io.github.libtmux:libtmux
- **Language:** Java
- **Kind:** class
- **Source:** https://github.com/libtmux/libtmux-java/blob/f56392b5d9bc7f1f9c1631842333fb90f3d82d40/libtmux/src/main/java/io/github/libtmux/exception/UnsupportedFeatureException.java#L16
- **Page:** https://libtmux.org/en/java/latest/reference/io-github-libtmux-exception-unsupportedfeatureexception-unsupportedfeatureexception/

The running tmux does not have something the call asked for.

Raised instead of dropping the option. The Python sibling warns and carries on, which returns a
pane that differs from the one described in a way nothing downstream can detect; a caller who
asked for an empty pane and got a shell has no way to notice before something runs in it. Skip the
feature, or require a newer tmux.

The feature and the versions are in the message and not in accessors: a throwable is
serializable, so exposing a {@link TmuxVersion} here would mean making that serializable too.

## Members

### Other members

- `UnsupportedFeatureException` (method): A feature that needs {@code required} or newer, on a server running {@code running}.