This part

MO-1


needs to be a date, is it?

If it is a month index number (which it looks like since you are subtracting
1) it will always be January since
0-31 as date serial is Jan 1900?

Try to change the text function part to


=TEXT(DATE(2008,MO-1,1),"MM")


You can basically put in whatever year you want where I put 2008, it is just
to get a legit date
so you can subtract one month if that's what you are doing

--


Regards,


Peo Sjoblom

"Sandy" wrote in message
...
Hello
I have a monthly file My File mm-yyyy.xls. I am trying to reference last
months file using cell C1 (Named month) and indirect.ext using
cell("FILENAME'). The month portion of the formula is evaluating to 01 no
matter the month.
My formula:
=INDIRECT.EXT("'"&LEFT(CELL("FILENAME",A1),FIND("-",CELL("FILENAME",A1))-3)&TEXT((MO-1),"MM")&"-"&YR&".xls]Monthly
Summary'!$"&"b$37")

What should I change in TEXT((MO-1) so it will evaluate to the previous
month. I realize that January will be a problem and plan on manually
entering the values unless some one has a suggestion for that too.

Thanks!!!