Hello, this is my first post. Thank you for any help on this project of mine for my son.

I have a sketch of a gear tooth pattern that I have checked with , Tools, Sketch tools, Check sketch for feature and it finds no reason for not being able to extrude cut this pattern, but it still won't highlight.

Can anyone explain why it won't?
I have included the pack & go zip file of the file.
Thanks again, Martin.