I believe your first group has the "--" in wrong place. In its current place,
your trying to convert the text to numbers, and then compare to G6.

=SUMPRODUCT(--('[Cognos Links.xls]Current Month'!$A1:$A5000=G6),--('[Cognos
Links.xls]Current Month'!$B1:$B5000=G9),'[Cognos Links.xls]Current
Month'!$F1:$F5000)

Note also, if row 1 contains header text, this will snag when it tries to
multiply F1 directly.

--
Best Regards,

Luke M
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"Jan" wrote:

I am trying to sum column F for entries where the following conditions are
met:-

Column A contains text value matching G6
+
Column B contains text value matching G9

=SUMPRODUCT((--'[Cognos Links.xls]Current Month'!$A1:$A5000=G6),--('[Cognos
Links.xls]Current Month'!$B1:$B5000=G9),'[Cognos Links.xls]Current
Month'!$F1:$F5000)

Much appreciated!