Bug: When extruding linked sections with many holes

When designing this new part for a mobile sensor platform, I found that when I use the push/pull tool to extrude the sections, some extrude fine and some do not (see pics).

I tried reversing the faces on some and all sections and removing the internal face of the previously extruded section, but to no avail.

Any thoughts on this? The section in the middle simply will not extrude in either direction.


If SU thinks you’re modeling an internal cavity, it does not leave a face behind. Indeed, it’s not very clear what the “sections” are for.

In any event, to force SU to leave a face behind when you Push/Pull, hit the Ctrl key before Push/Pulling. placing a plus sign next to the tool.