I cannot see what is going wrong with this. Just learning OpenStudio so this may be something that I have missed. When I change construction type under facilities on any model created in SketchUp Pro, the simulation will run as long as I just switch between pre-made construction sets or pre made individual constructions within a construction set. If I add change to some of my own constructions that I have created then the simulation will fail. The weird thing is that when I switch back to the original construction/construction set that I can successfully run the simulation with before changing the constructions, once I switch back the simulation will no longer work. So something more than just the construction has changed even though this is the only thing that I knowingly alter. Maybe this is a bug? Maybe some of my own constructions are somehow corrupted? I'm not really sure why this would be happening. My only thoughts are to try making all my custom constructions from scratch and individually testing running the simulation after creating each one but I will have to make a lot of custom materials and constructions in the future and I don't particularly want to do this after every one! Happy to post the .osm file somewhere if anyone wants to have a look.

Cheers.