One thing I see missing from the above posts is that, because you are
setting up a circular reference, you need to turn iteration on via the
Options dialog. Then enter the formula f2=IF(a3="",RAND....,f2)

HTH


--
MrShorty
------------------------------------------------------------------------
MrShorty's Profile: http://www.excelforum.com/member.php...o&userid=22181
View this thread: http://www.excelforum.com/showthread...hreadid=375800