I am attempting to replace a SUMIF with a SUMPRODUCT so that I can calc on
workbooks that are not open. I am able to get the SUMPRODUCT to work fine,
but when I try to add INDIRECT so that I can build the parms to pass to the
SUMPRODUCT, I am getting #REF errors. Once I get this working, I'll try to
get the indirect.ext working.

I can't seem to find my syntax error. Do you happen to see the problem?

SUMPRODUCT without the INDIRECT that is working:
=SUMPRODUCT(--('[09122009_Nancy Taylor.xlsm]Weekly
Timesheet'!N:N=C6),('[09122009_Nancy Taylor.xlsm]Weekly Timesheet'!L:L))

Trying to work in my INDIRECT statements. The second parm is fine - it's
the first one that Excel doesn't like:
=SUMPRODUCT((INDIRECT("--('["&$B$2&"_"&D6&".xlsm]weekly
timesheet'!N:N=C6")),(INDIRECT("'["&$B$2&"_"&D6&".xlsm]weekly
timesheet'!L:L")))