First you said 200, now 400. What makes you think so? What do you see?

I suspect the new rows are actually text, although they may look like
numbers and are formatted as numbers.
You can easily check with the ISTEXT() function.
If so:

Format an empty cell as Number.
Enter the number 1.
EditCopy
Select your "numbers"
EditPaste special, check Multiply

--
Kind regards,

Niek Otten

"NTaylor" wrote in message
...
Do you know why mine wouldn't? It looks like it will only go as far as
row
4000, and then the formula doesn't work any more. Does mine have a limit
or
something?

Thanks
--
Nicki Taylor


"Sandy Mann" wrote:

Both you formulas work for me.

--
HTH

Sandy

with @tiscali.co.uk

"NTaylor" wrote in message
...
Hello,

I have a formula (see below) that will work for rows 2-1000, but once I
change it to look for columns beyond 2000, it will not work anymore...
Any
suggestions?

This works:
=SUMPRODUCT(--('Q Info'!$A$2:$A$1000= 'Per Peice'!A9),'Q
Info'!$C$2:$C$1000*'Q Info'!$B$2:$B$1000)

This DOESN'T work:
=SUMPRODUCT(--('Q Info'!$A$2:$A$9999= 'Per Peice'!A9),'Q
Info'!$C$2:$C$9999*'Q Info'!$B$2:$B$9999)



--
Nicki Taylor