Thanks for the answer, wp. You were on the right track.
The answer came to me as I was eating chicken and rice at a nearby Mexican restaurant.
I reordered the dropdown on the fileSaveAs dialog. In the fileSaveAsAccept procedure I had a case statement which had the possible formats and I forgot to renumber the items to match the new dropdown configuration. Once I got the case numbers to match, I was in business.
Cheers
Charles