The Lookup() function does not posses the ability to *only* return exact
matches.
Try Vlookup() instead.

=VLOOKUP(A5,'[Sortable Complete Records.xls]Sheet1'!$A$4:$B$1000,2,0)

Now, when no exact match is found, you'll get an #N/A error.

The formula gets longer if you want a "0" or "" (null) return instead.

=IF(ISNA(MATCH(A5,'[Sortable Complete
Records.xls]Sheet1'!$A$4:$A$1000,0)),0,VLOOKUP(A5,'[Sortable Complete
Records.xls]Sheet1'!$A$4:$B$1000,2,0))

--
HTH,

RD
==============================================
Please keep all correspondence within the Group, so all may benefit!
==============================================



"DJ" wrote in message
...
My problem is that my formula is returning values for which there
shouldn't
be a value. Here's the first formula...

=LOOKUP(A4,'[Sortable Complete Records.xls]Sheet1'!$A$4:$A$1000,'[Sortable
Complete Records.xls]Sheet1'!$B$4:$B$1000)

It returns the proper result.

The next line has this formula...

=LOOKUP(A5,'[Sortable Complete Records.xls]Sheet1'!$A$4:$A$1000,'[Sortable
Complete Records.xls]Sheet1'!$B$4:$B$1000)

There is no match for "A5" in the other spreadsheet, so I'd like it to
ruturn either a "0" or nothing. Instead, it returns the same results as
the
previous line.

Thanks in advance for any help.