Hello,

I'm trying out SolidWorks 2013, and I ran into this error. I'm attaching a file. I need to extrude two oposite rectangles on top of the box (left bottom and right top). SolidWorks says it can't because of this zero thickness.

How do I work around this problem?

It has to be:

Merged result (ONE part)

Corners of these rectangles have to coincident (no micro space)