Niklas Holsti mentioned: "[..] Software development started in Janauary 2002 and will use the XGC Ada compiler (a variant of Gnat) with the Ravenscar tasking profile. [..]" After reading XGC manuals and speaking to one of the XGC compiler writers, I still have not lost the impression that whatever software I could get from XGC, I could just get the same from the New York GNAT FTP download site. Is my impression correct? Regards, Colin Paul Gloster