If this is something you have to do regularly, Jim Cone's commercial Add-in
called XLConpanion makes this job a breeze............


Vaya con Dios,
Chuck, CABGx3




"skippy_prine" wrote:

I am trying to spot possible duplicate numbers in a ver large file. Is there
a formaula I could use to make sure none of these 13 digit account numbers
are listed twice within the same file?