If you mean external linked workbooks that are closed then COUNTIF won't
work but you can use SUMPRODUCT instead of both COUNTIF/SUMIF
=COUNTIF(A1:A10,">0")
=SUMPRODUCT(--(A1:A10>0))
will return the same result
=SUMIF(A1:A10,">0",B1:B10)
=SUMPRODUCT(--(A1:A10>0),B1:B10)
will return the same result

Signature
Regards,
Peo Sjoblom
> It appears that the countif function (along with sumif and others i'm
> betting) do not function properly with external links. The only
> workaround I've been able to find is to write a macro to open the
> various externally referenced sheets and then close them. Is there a
> better way for this?
hall.jeff@gmail.com - 28 Nov 2007 16:55 GMT
Thanks... That worked... What a wonderfully undocumented feature