So I've got this old file that's been on our server a while and I need to make a small modification to it, and I did. But in changing a flange length, the mounting holes disappeared. They are just simple extrude cut circles, and the extrusion fails and will not work. I tried every single option in extruded cut, I tried creating new sketches, no change in options results in anything other than the error "failed to cut body"

Anyone seen this before? Know a solution?