Sorry to bring up the topic of this thread again, but I also opened the scenario (both versions) in the editor, decided that fixing the instructions wasn't worth the trouble, then saved without changing anything. Doing this did not fix anything: the same error message appeared. My RW installation is in excellent shape and my computer runs complex scenarios on all routes without any trouble, so this is clearly a scenario related problem. As I noted previously, I've sent support requests without receiving any replies--not even a courtesy "I'm on vacation ..." message.
Tom Pallen