Dear Hans, > Is 7.5 is necessary ? (that's not a problem, just for interest) Yes, you must use 7.5 Moose could run fine with 7.4 as well, but since Cincom does not document changes between versions properly, Moose does not waste energy in the pains of backward compatibility. I'd really love to have Javadoc for VW Smalltalk, with its @since tag! cheers, AA