I had this problem before. In my case, it was caused by the parts in the assembly having different units. When I made sure the units were consistent and updated the assembly in designspace the issue was resolved.
Does anyone have any input on the minimum radius on a blind drill hole at the edge between the cone and cylindrical portions of the hole? Without any radius, the stress concentration is huge. In reality, there will always be some radius even though none is specified in the manufacturing...
