LinePrinterRecipient 'Load Printer List' does not bring up a list of the available printers
TAC I/A Series
I/A Series G3 Enterprise Network Server (ENS) or Enterprise Network Controller (ENC).
At this stage the reason that this occurs is unknown but the following resolution is the current workaround.
Since you are not able to find the printer using the 'Load Printer List' button, you should just type in the name of the printer in the LinePrinter Recipient's properties 'Printer' field.
To make sure you get the name correct, go to Windows Control Panel and go to 'Printers and Faxes'. Find the line printer and right-click on it to the properties. Copy the name of the printer. Go to Workbench and paste the name of the printer in the LinePrinter Recipient as per described above.