>>Is this a printer that's hooked up directly (e.g. via USB) to the computer or is it on the network? If network, is it one that is hooked directly to network, or does it go through a print server? If there is a print server involved, check the configuration to see if there is an option to autoject at the end of a print job.

On the development machine the printer is a direct attachment via USB. In the 'office' the printer is a shared printer on one of the PC's. It does the same in both environments. I have looked and have found no autoeject settings anywhere.