See if one of these works for you:
Note: Commit these array formulas by holding down [Ctrl] and [Shift] when
you press [Enter]
1. The address of the first empty cell in Col_A:
=CELL("address",INDEX(A1:A65535,MATCH(TRUE,ISBLANK(A1:A65535),0)))
2. A reference to the first empty cell in Col_A:
=INDEX(A1:A65535,MATCH(TRUE,ISBLANK(A1:A65535),0))
3. The row number of the first empty cell in Col_A:
=MATCH(TRUE,ISBLANK(A1:A65535),0)
Does that help?
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Regards,
Ron
XL2002, WinXP-Pro