Use a formula of

=OFFSET($A$1,,,COUNTA($A:$A),1)

in the list formula of the DV.

--
HTH

Bob Phillips

(replace somewhere in email address with gmail if mailing direct)

"mikeb" wrote in message
...
I created a validaton, it should be in column b only upto the last row of
data in col a, and the amount of rows with data in col a will change all
the
time, what should I do? Do I have to delete and recreate the location
every
time, if so then how? thanks in advance!