wmayer wrote: ↑Tue Jan 18, 2022 11:15 am
...
When inspecting the (binary) STL file then there are a couple of defects. There are some duplicate points and probably as a consequence degenerated triangles and non-manifold edges. This might be the reason for the failure to create a shape.
To respond to the contents of the zip files...I did not keep the files after I downloaded from Discord. Obviously, I got the open, extract, repackage wrong. Unless the OP wants to follow up and post them, I'm afraid I'm no help.
For another data point, which may have no bearing... When I did open them, I tried both OCC 7.5.3 and 7.6 (with the source du'jour of FC 0.20). I saw the same defects you note. But, I opened them in Blender and it found no non-manifold issues. (And, Blender is pretty good about finding them.)
Star Trek II: The Wrath of Khan: Spock: "...His pattern indicates two-dimensional thinking."