Hello again,

Thanks for the suggestions, sorry I've been so long to reply. It's been
extremely busy, and I didn't have a chance to test the suggestions you've
both given, although I did find my own workaround. As long as I have
something to filter by, I can filter my list through the Mail Merge
Recipients dialog box, and then, once the list is narrowed in this way, the
merge works fine.

Thanks as always for your support!
Cara