Unfortunately this one throws those same "convexity" errors.. You raise a good point about igs files. I'll go .stp from here on out when exporting solids.

The Alibre issue is that, once imported, I cannot *do* anything with the model in terms of shelling, adding bosses, and so on, presumably because of these errors it's finding. That's with as much healing and tolerant importing as Alibre can do.

Maybe I'm not generating the model right in MOI...