I am pretty sure modules won't affect anything.
Even if a window is above the cutting plane and has projected floor plan display in a projected wall, it won't show on plan but will still be selectable in the schedule (the button won't be greyed out).
You can't select in 3D either?
What if you add extra fields to the schedule like layer, home storey, parent ID, etc.
This may help you narrow it down as to where they can be.
Barry.
One of the forum moderators.
Versions 6.5 to 27
Dell XPS- i7-6700 @ 3.4Ghz, 16GB ram, GeForce GTX 960 (2GB), Windows 10
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