The report is adding one invoiced line item at the end of the report to the otherwise correct report.  If you sort it by po or vendor it goes to the next higher closed purchase order number after the final correct received purchase order listed.  Return to BKPOIF.RUN and ran fine.  
 
EVO 10/11/10 SP1
Windows XP
Pervasive SQL 2000i
 
Jane
Western Chemical Pumps, Inc.