# Windows Error 206 repair

## Cause

The original launcher created `.venv` inside the chamber folder. When the chamber itself was
placed deep inside the UNNS project tree, NumPy installation produced internal filenames longer
than the Windows path limit and failed with `WinError 206`.

## Repair

The Windows launchers now create and reuse a short external environment:

```
%LOCALAPPDATA%\UNNS\GBI010
```

The chamber code and data remain in the project folder. Only third-party Python packages are
installed in the short external environment.

## Existing failed installation

The incomplete `.venv` folder inside the chamber is no longer used. It can be deleted safely.

## Start

Double-click:

```
RUN_GRAV_BRIDGE_I.bat
```

The first launch installs the requirements. Later launches reuse the same environment.

---

## v0.3 project interpretation

This document belongs to the external transfer experiment. Numerical, technical, protocol, or provenance content above is preserved. The transfer result tests one static global architecture: it does not negate the galaxy-specific structural information carried by the curves. Complete curves retain identity, and ρ is the leading channel for local or regime-conditioned follow-up.

