# server.Server.require_generation

- **Module:** server.Server
- **Package:** libtmux
- **Language:** Rust
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-rs/blob/8a648c0894dfffc9303583f753b6c8ae01f2fe76/crates/libtmux/src/server.rs#L1379
- **Page:** https://libtmux.org/reference/rs/server-server-require_generation/

```
server.Server.require_generation(self, expected: ServerGeneration) -> Result<(), Error>
```

Fail unless the daemon answering is still the one that was captured.

# Errors

Returns [`Error::ServerGenerationChanged`] when a different daemon now
holds this endpoint, or a transport error when tmux cannot be reached.