# tmux.ErrControlStreamLost

- **Module:** tmux
- **Package:** github.com/libtmux/libtmux-go/tmux
- **Language:** Go
- **Kind:** attribute
- **Source:** https://github.com/libtmux/libtmux-go/blob/52968a3181c1c9e6d1b26c565d4b170968ae61c0/tmux/control_client.go#L21
- **Page:** https://libtmux.org/en/go/latest/reference/tmux-errcontrolstreamlost/

ErrControlStreamLost identifies a [ControlClient.NextNotification] stream that ended before the caller asked to close it, distinct from the clean end an explicit Close or CloseContext produces. It is most often the underlying tmux client process exiting because the server it was attached to did.