Thank you for the quick response.
So I need to install the developer license to be installed on all my pc's ?
If that is the solution, fine by me.
I will try it...
The reason for my post, is that I am installing new pc's with progress 10.2B and windows xp sp2.
And I want to create a database, where I want to load a definition file (.df) from version progress 9.1d and a a lot of data files ( .d file(s) ).
Is this the right way to do an clean upgrade from version 9.1d tot version 10.2B ?