One mo

=sumproduct(--(text('2008'!b3:b2000,"yyyymm")="200901"))

Tina wrote:

=SUMPRODUCT(--(MONTH('2008'!B3:B2000)=1),--(YEAR(B3:B2000)=2009))

Hi all, I am using the above, but am getting #VALUE!

The format the date is typed in, in the main data sheet, is "05 January
2009", but I have also tried 05/01/2009 but to no avail. Can anyone say
where I am going wrong?
Thanks
Tina

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Dave Peterson