# error.Error.InvalidVersionOutput.output_len

- **Module:** error.Error
- **Package:** libtmux
- **Language:** Rust
- **Kind:** attribute
- **Source:** https://github.com/libtmux/libtmux-rs/blob/84de9258a07d10bdd5f6da01b016a9ae06fe1210/crates/libtmux/src/error.rs#L475
- **Page:** https://libtmux.org/en/rs/latest/reference/error-error-invalidversionoutput-output_len/

```rs
output_len: usize
```

The number of bytes the check read: stderr for the daemon probe, stdout for `tmux -V`.