Formula in B2:
=SumProduct(N(Offset(INDIRECT(nfCond&"!B2"),Row()-2,Column()-2)))

http://boisgontierjacques.free.fr/fi...Sum3DCond2.xls

JB

On 18 mar, 23:15, Celia wrote:
I have about 50+ worksheets in a file that *I need to sum. *However, I only
want to sum some of the sheets if it meets a certain criteria. *This
criteria is located in a separate worksheet in the file that lists each
worksheet name
in one column and in the next column it list the type of worksheet. *If a
worksheet is of a certain type I need the sum of those types. *

In addition. there are more than one cell that I am summing. *The solution
that someone provided me below worked great. *So I tried copying the cell to
grab the other data that I needed but the cell B2 which in his example is the
cell I am grabbing in each worksheet is not dynamic so when you copy the cell
with the formula it stays B2. *I tried changing it to pull the B2 out of the
parenthesis but it didn't work I got a circular reference. *Any suggestions. *
*I really need to be able to copy the formula down 30 rows and across 30
columns.

This is what I tried:
*=SumProduct(SumIfI(INDIRECT("'"&nfCond &"'!"&B2),"<0"))

http://boisgontierjacques.free.fr/fi.../Sum3DCond.xls

Named range
cond $H$2:$H$8
nf $G$2:$G$8
nfCond =OffSet($J$2,,,CountIf($J$2:$J$12,"<"&""))

=SumProduct(SumIfI(INDIRECT("'"&nfCond &"'!B2"),"<0"))

JBhttp://boisgontierjacques.free.fr/

On 18 mar, 03:17, Celia wrote:

I have about 50+ worksheets in a file that *I need to sum. *However, I only
want to sum some of the sheets if it meets a certain criteria. *This criteria
is located in a separate worksheet in the file that lists each worksheet name
in one column and in the next column it list the type of worksheet. *If a
worksheet is of a certain type I need the sum of those types.

Celia

--
Celia