Thanks Alex, at least I know now, that it's not supposed to work :-)
Since bugzilla https://bugs.eclipse.org/263226 seems to describe exactly
the problem I encounter, any idea on when this issue will be addressed?
And any hint, where I would have to start with my own copy/paste
implementation?
Regards, Peter
So, you can either implement D&D by your own or wait till it will be
covered by generation process.
I do not need DnD support, I just mentioned that it works almost as I
would expect copy&paste to work (same as Duplicate).
Sorry, all I wrote was about Cut/Copy/Paste. :-)