This topic is all over the place clear back to 2012. I just can't get it to work for me. The usual solution being "Check Union Overlapping Volumes" This isn't working for me.
Attached is the file. It is a corner piece for a plastic door. It has 2 screw holes and an internal void for a magnet. I already printed the internal cylinder and it is perfect fit for my magnet. The grey spot shows up in Cura but when i click slice the void doesn't exist, cura does regular infill. Any ideas on how to get this cavity to work?
This was made in sketchup. I have that file if anyone wants to look at the original, just looks like I can't attach it here.
I made 2 versions, the first had the cavity for the magnet, the 2nd had a double shell around the magnet with the theory of making a thicker wall and maybe cura would work with that. Neither version made any difference.
corner finish.stl