This is very strange. I have used the measures 'Replace Exterior Window Constructions at Different Orientations from the Model' and 'Replace Exterior Window Constructions with a Different Construction from the Model' in the past. If I open an .sm file and Apply Measure Now, these seem to work. However, if I open an .osp file, with the same .osm file as the baseline model, I am able to add these measures in the "Organize and Edit Measures for Project" tab of PAT. But when saving and re-opening that .osp file, I can no longer edit any of these measures in that tab. PAt then crashes without any message at all, or with this message: . Luckily, the "Select Measures and Create Design Alternatives" tab of PAT still seems to work. Also, I see most any other I have installed in this folder: C:\Users\MattK\OpenStudio\Measures. However, the said window measures do not show up there?