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Posted to microsoft.public.excel.worksheet.functions
Rick
 
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Default #NUM! in Date field calculation

Thanks for the help...works great!

"vezerid" wrote:

Rick, it is supposed to return #NUM!. When A1 and A2 are blank your
function essentially becomes =DAY(0, 0, 0). When you input values in
these two cells, Excel will recalculate and produce a result
automatically.

If you want to avoid displaying an error value (and display, say, an
empty cell instead), use the following formula:

=IF(OR(A1=0, A2=0), "", DATE(YEAR(A1),MONTH(A1)+(A2-1),DAY(A1))

HTH
Kostis Vezerides