I have a C# application (.NET 3.5 SP1) that I am printing serial numbers for product for a manufacturing company. I am using Active Reports 3 (ver. 5.2.385.2) to print these labels. However, when the printer(Zebra TLP 3842) has an issue, it seems like the printer queue reprints the print job. This causes duplicate serial numbers to be printed. Does anyone know how to ensure that this will not happen. I would rather not have a serial number print than have duplicate serial numbers.