Hi All,

I am new to solidworks and trying to learn as a self study through my school computers (university of waterloo).

I am trying to create a macbook cover, which i can 3d print. When i try to extrude cut the sketch i have made i get a rebuild error: unable to create this feature due to geometric conditions. I have checked for open contours and the sketch is defined. If you can please help, it would be most appreciated.

Thanks in advance.

I have attached the file