# src.BuildError.MissingInitialWindow

- **Module:** src.BuildError
- **Package:** tmux-workspace
- **Language:** Rust
- **Kind:** constant
- **Source:** https://github.com/libtmux/libtmux-rs/blob/f0e37052c232636b61d095817046e6bfc8f2ca40/crates/tmux-workspace/src/lib.rs#L65
- **Page:** https://libtmux.org/en/rs/latest/workspace/reference/src-builderror-missinginitialwindow/

tmux created a session without the window it always creates.

This cannot be reported as a libtmux error: its variants are
`#[non_exhaustive]`, so only that crate constructs them. A consumer
describes its own failures in its own vocabulary.