I am trying to re-create a spreadsheet into a single file where previously I
was linking to another but I am now having problems.

Original code:
=SUMPRODUCT(('No Prospects.xls'!$D$1:$D$10000=$A$3)*('No
Prospects.xls'!$G$1:$G$10000=A19))

Returns a value of 2

New code:
=SUMPRODUCT((Data!$C$1:$C$10000=$A$3)*(Data!$L$1:$ L$10000=A19))

Returns a value of 0 !!!!! should be 2

I know the cell range has changed i.e. D to C and G to L but this should not
matter.

Please help as this is really frustrating !!!!

Mark