I don't understand what SB did with this version. The documentation says that the C2 and C3 routines were changed to use different variables - which I guess they do now - because now C2 and C3 on my alpha don't work - they call up "My Variables file" - and I get an error as it tries to read that file instead of the proper C2 routine. I can't see where SB advised of changes that the user had to make after installing V3.1.15 to make the C2 and C3 routines work. Can anyone help here pls. Thanks. Pete