I am trying to cut out a sketch that I projected from an assembly. When I go to use the extrude comand and use cut it gives a zero surface error when I try to go all the way through. The part file is attached. Thank you for the help!!
I'm having trouble opening the file, are you using a student edition?
Anyway, try moving the lines that are right on the edges of the part so that they hang off the part a little. A very tiny sliver can cause the zero thickness error. If you search that term on the forum, you'll find other cases where this happens, and how to avoid it.
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I attempted what Matt suggested and it didn't help although I think I pinpointed the area it's going zero manifold. You could try moving the sketch line which defines the cut here. Not sure why you couldn't open it, Matt.
That's about as far as it would go before it gave an error.