I have a complaint!
I know that new version of ArchiCad can't open files from very old versions!
This is very sad for such a professional program!
What about if i have a project made on version 7 thirteen year ago and the client need to make some changes on the plans?
I need to install version 9 and then version 11 and then version 13 to finally open the file on version 17!
Maybe Graphisoft should make a small utility program to convert files from any old version to the newest version!