New tests.






In this image the ring on the back is fully decoupled (in Alibre) from the assy but mantain the union with the other parts.
This happen ONLY if i click on the ring; the other parts selection is correct.









This is the strange thing when i click on cyl to select it. In this case the cyl drives the selection. NOT the other parts.




I deleted the ring, then undo and move: the other parts are magically duplicated!

Gianrico