The measure works by:

1. Retrieving all FenestrationSurface:Detailed objects.
2. Checking that the object's Surface Type is "Window".
3. Checking that the object's Outside Boundary Condition is "Outdoors".
4. Checking that the object's Construction Name matches the provided construction name (optional).

If that still doesn't help you figure it out, please provide a link to your model via, e.g., Google Drive or Dropbox.