The situation has to do with the report - your data is fine. From the error message, there is something wrong with how the report is dealing with the 4th sort choice; a problem with the report. This has been reported by one other client where using Vendor Name as the 4th sort on the list caused the problem, but changing this to something else allowed the report to print OK. So perhaps try changing whatever you have in the 4th sort on the Vendor Transactions print report screen.