# 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/52968a3181c1c9e6d1b26c565d4b170968ae61c0/tmux/plan.go#L387
- **Page:** https://libtmux.org/en/go/latest/reference/tmux-planresult-err/

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

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