feko中 如何取消Union

Undo a Union in CADFeko
https://forum.altair.com/topic/24349-undo-a-union-in-cadfeko/?tab=comments#comment-64734
I'm just starting out with FEKO and am new to modeling in general. The answer is probably obvious, but I have joined several objects in my CADFeko model together in a union and would now like to undo that union so that I have separate objects again. However, when I right click the union, the "disassemble" option is grayed out.
How do I undo a union in CADFeko?
If you select an object inside the Union, you can right-click and select copy.
You will have to do this one-by-one for each object you want separate again.
重新复制也会，以为这是解决的办法