Much as I try to avoid date/time questions, I can understand why Excel
doesn't like negative time, it cannot exist except in a mathmaticians
head.

Try another column for your flex, flex-under and flex-over and then you
should have no troubles.


--
Bryan Hessey
------------------------------------------------------------------------
Bryan Hessey's Profile: http://www.excelforum.com/member.php...o&userid=21059
View this thread: http://www.excelforum.com/showthread...hreadid=390851