In fact generally as you can't create different objects with the same name, you can't erase 2 objects with the same name :)
Anim8or ;) http://www.anim8or.com/
Maybe it's not exactly a normal CAD program ;)

So I will see with attention the right up corner and I find it's to hard for me I will ask a special flashing text :)

@Ralph : yes I can make also this : a little copy before delete action