Hi Steve,
Cunningly that's pretty much the only "normal" stop you'll see in the program. It's important, during development, to see it, and it should never appear (if you do things right) after deployment.
Ok, so what does it mean?
Typically it means you've called a form, and the parameters for the form are incomplete. My _guess_ is that you're calling the form from a browse. If so the "unique unchanging key" used on the browse must match the "unique unchanging key" used by the form.
If you are following FAQ #4, and calling the form from somewhere else, then you need to pass, as parameters, the values of the key fields to identify the record you are gonna load.
Cheers
Bruce