I keep getting the error, "No bodies remain after combine operation".  As I understand it, it's a problem with zero-thickness geometry (mating surfaces which are exact)  I've searched the forum and tried the few answers I found, including:

1. Extruded Boss/Base with "merge result" selected to add material so the two intersect .
2. Extruded Boss/Base so the two intersect and then trying to Combine
3. Extruding a surface common to the bodies and using Intersect
4. The cavity method described here:  "No bodies remain after Combine operation" workaround - Album on Imgur

Any other suggestions?  I'm on SW'16.

Thanks!