reproducing the mating half

[conservativetrolls]

th

Theres no arc section across the top. When I click "Analyze Sketch", it shows an open loop.

The advanced selector showed the top arc portion of your sketch to have a reference arc, nothing else.

When i converted the reference arc to a sketch figure, it extruded fine.View attachment 36181

Thanks a ton. I was just starting to get mad when something so simple was giving me such a hard time!!!