Jono,

This is an Excel oddity, and I found that as long as you keep below 10000
for the base number, you can continue adding it without problem.

So, you can work around it.


--
HTH

Bob Phillips

"Jono" <Jono@discussions.microsoft.com> wrote in message
news:63D34E10-CA88-4016-9D2D-F3EA47BD0533@microsoft.com...
> I am trying to keep a rolling total of aircraft flight hours. When the
base
> hours is greater than 10000:00 excel will not add the next days total. It
> seems that the base hours need to be equal to or less than 9999:00,
however
> many of the aircraft have done more that 10000:00 hours
> --
> Jono Blowes