Hi,

I recently asked for help looking up values in one column by the year in
another column on different worksheets, and was very kindly given the
following solution:

=SUMPRODUCT(--(YEAR(INDIRECT("'"&A3&"'!H8:H1000"))=2008),INDIREC T("'"&A3&"'!I8:I1000"))

I have now been asked to add sub-totals by month! I came up with:

=SUMPRODUCT(AND(--(YEAR(INDIRECT("'"&A3&"'!H8:H1000"))=2008),(--(MONTH(INDIRECT("'"&A3&"'!H8:H1000"))=1))),INDIREC T("'"&A3&"'!I8:I1000"))

however this returns a #VALUE! error. I have also tried JANUARY instead of 1
for the month criteria - same result.

If anyone could help me on this I would be very grateful. TIA.