I have been working on a project for a few months now, and haven't had any problems using Lighting Fixtures with IES files and getting the Spaces to calculate Average Estimated Illumination.

I went into the project today and noticed that for every single lighting fixture instance in the project, the Coefficient of Utilization is blank and grayed out. Spaces are still reporting the correct AEI, everything else seems to be working as usual.

Any ideas for what's going on with the CU?