Many thanks, Tom! I did a copy/paste of the wall containing the window, then param-transferred (is that a word?...) and it worked.
However, I still have a project with two doors, one on story 1 and one on story 2, and parameter transfer doesn't work. The clicks all take place, but door 2 doesn't end up identical to door 1.
Comment, anyone?
Alex Zachopoulos
MacBook Pro 17" 2.4GHz, MacOS X 10.5.6, ArchiCAD 11 & 12, WinXP, Vista (well, not really Vista...)