You are not showing where UF was defined. Initially it is empy, but
suspect that it is preceeded by something like this:

UF = Application.Dialogs(xlDialogOpen).Show

If the user selected the Cancel button or hit the Esc key, then UF wil
be False, not null.

I suggest replacing the current:

If UF < "" then ...

with the following:

If UF < False then ..

--
Message posted from http://www.ExcelForum.com