Hi everyone,

this is my first post here. I've been studying Industrial Design Engineering at TU Delft in The Netherlands, and have worked with Solidworks since 2008, but I'm by no means an expert, so I could just be missing something really obvious... please bear with me.

I have created a tetrahedron-like solid body, with 4th order rotational symmetry around the center point (not sure if this is correct, but I hope you understand what I mean).

On the surface of this body, and also point-symmetric around the center, I have created several other solid bodies that will function as snaphooks. I now want to combine everything (49 solid bodies) into 1 solid.

I can combine the snaphooks on 3 'flanges' of the tetrahedron (3*12) with the main body, but when I try to combine the snaps on all 4 flanges, I get a rebuild error: "Unable to create this feature because it would result in zero-thickness geometry". Now I realise there are numerous topics on the subject of troubleshooting zero-thickness errors, but I'm confused, because the 12 snaphooks on each of the flanges are supposed to be identical. I mirrored them from 1 set of 12, which in turn is a circular pattern of a set of 4 hooks drawn on one side of flange #1. Why is the last set of snaps causing problems?

With so much experience and expertise in these forums, I would really appreciate it if someone could help a student out and look at my files to see if they can figure it out, or point me in the right direction.

Best regards

Thomas