# tmux.PlanResult.Err

- **Module:** tmux.PlanResult
- **Package:** github.com/libtmux/libtmux-go/tmux
- **Language:** Go
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-go/blob/5f808882015a975a65acc7f9da5b3ff0d5cbdc91/tmux/plan.go#L387
- **Page:** https://libtmux.org/reference/go/tmux-planresult-err/

```
tmux.PlanResult.Err() -> error
```

Err returns the first failed or indeterminate operation's error, or nil when every operation completed.