Hi,

I have the formula =IF(B13="","",(DAYS360(B13,$C$6))/360) to count the age of a person on a form. It works perfectly on my 2 laptops (one of which has Windows 7 and I use alternately Excel 2003 and 2010 or 2007) and on this very one I am now using, with Windows 8 and Office 2010. However, when I try to work with the same form on other PC or laptops here at office (having either Windows XP, 7 or 8 - and with either Office 2003 or 2007), the cell returns #VALUE!

I certainly have made sure that the cell-formatting (date formatting 01/01/2013) is correct in both cells.

Any clue why the formula does not work again?

I will appreciate a solution indeed (forms to work with are some 400...)