Thanks, Marcos, but I have to stick with NI DMM version 19.5 because that is what has been shipped to customers. Well, I suppose I could temporarily upgrade it just to see if that works, but I don't particularly want to do that and then go back to 19.5, NI DMM installation takes ages!
I suspect there is some kind of software configuration problem because a) other people in the company who are working with the same software revs do not see this problem and b) I'm fairly sure it did work for me one time. Is it possible I have removed some required sub-package, or disabled a service, or something like that which DMM simulation relies on?
It's possible I had an earlier version of MAX when it was working, could that be the problem?
Jon