Yeah, I made a topic about that yesterday, but deleted it as I resolved those in the file I posted.
For some reason Revit’s import CAD within an in-place generic model was able to process the geometry (with an unsupported geometry error) and brought it all in, whereas the RiR imported a much smaller portion of the geometry.
In Revit 2023, I don’t get those. There shouldn’t be any edges smaller than 2mm in the file, I believe the shortest one is about 5mm and there are no non-manifold geometry either.
And I set the tolerance in the Rhino file to be 0.1mm as per the documentation of RiR.
E: You should notice that I had different error messages on the same component.