I know that I must be missing something simple. The attached file consists of an extruded block, and a 3D sketch. The sketch is unsolvable. It is a line with both ends having an 'On Plane' sketch relation. Both are on the same plane. I get this a lot, and have no idea why. Seems completely broken to me, but I always assume operator error first. Anyone else seen this happen? Any idea why?
Thanks,
Mark
Delete both of those On Plane relations and make the Line On Plane instead of the end points.