I keep a master email address file as a .crv. When I recently added some new rows, excel wouldn't allow me to save the changes
Since we can't see your computer from where we're sitting, we don't know what "excel wouldn't allow me to save the changes" means. Did you get an error?
Did you get a message?
Did your computer freeze up?
Maybe just a tad more information might help.
Click Here Before Posting Data or VBA Code ---> How To Post Data or Code.