# CardinalityError

- **Package:** libtmux-swift
- **Language:** Swift
- **Kind:** enum
- **Source:** https://github.com/libtmux/libtmux-swift/blob/f02a4668570e1cc5198c941413750e021f42c214/Sources/LibTmux/TmuxError.swift#L86
- **Page:** https://libtmux.org/reference/swift/cardinalityerror/

Why a lookup that expected exactly one match did not get one.

## Members

- `!=(_:_:)` (function) — Returns a Boolean value indicating whether two values are not equal.
- `localizedDescription` (property) — Retrieve the localized description for this error.
- `noMatch` (constant)
- `multipleMatches(count:)` (constant)