# error.Error.CapabilityDefective

- **Module:** error.Error
- **Package:** libtmux
- **Language:** Rust
- **Kind:** constant
- **Source:** https://github.com/libtmux/libtmux-rs/blob/f0e37052c232636b61d095817046e6bfc8f2ca40/crates/libtmux/src/error.rs#L649
- **Page:** https://libtmux.org/en/rs/latest/reference/error-error-capabilitydefective/

tmux has this capability and the running release gets it wrong.

Distinct from [`Self::UnsupportedCapability`], which means the release
predates the feature and the answer is to upgrade. Here releases on
both sides work, so neither "upgrade" nor "the floor is too low" is
the fix: the caller has to leave a specific range.

Raised rather than returning what the release reports, because what it
reports is wrong in a way the caller cannot see.