Gail, because I've only read about it and never actually run into the situation like this before, I've never really had a need to fully understand the issues surrounding changing to a Full Recovery mode from Simple. Your statement - I'm paraphrasing - if you're in full recovery mode and you've not yet made that first full backup, the transaction log backups have nothing as a base - were just what I needed to make it clear.

Thanks for your help on my issue and thanks for the education.

Willem