I opened an previous version of a file I was working on and found this “solid” in it. It has these two holes.
Everything I have tried tells me this is a good polysurface.
I presume this is a bug so I share. I have no idea how I created this. However, there supports to be surfaces extending from where the holes are similar, but large then then bent pipe to the left.Problem Holes.3dm (6.9 MB)