# LibTmux.Action.CompletionError

- **Module:** LibTmux.Action
- **Package:** libtmux
- **Language:** Elixir
- **Kind:** exception
- **Source:** https://github.com/libtmux/libtmux-elixir/blob/66b9b1c3f3f3186428abdfda2c76f5cf87446710/lib/libtmux/action/completion_error.ex#L1
- **Bases:** [`Exception`](https://hexdocs.pm/elixir/Exception.html)
- **Page:** https://libtmux.org/en/elixir/latest/reference/libtmux-action-completionerror/

An action result did not meet an explicit completion requirement.

Raised by domain bang actions such as `LibTmux.Pane.split!/3`. `result`
preserves the original
failed, skipped or unknown outcome, including certainty and transport
evidence. An unknown outcome remains unknown; this exception does not
cancel work or authorize replay. Its message omits transport output.

## Members

### Other members

- [`result`](/en/elixir/latest/reference/libtmux-action-completionerror-result/) (property)
- [`t/0`](/en/elixir/latest/reference/libtmux-action-completionerror-t-0/) (typealias): The original action result that did not establish command completion.