Dymo printer not working correctly under Mavericks
I've had a Dymo Twin Turbo label printer for a number of years, and it worked flawlessly until I installed Mavericks. Since then it frequently shows up as disconnected, and the only way to reconnect has been to remove the printer from the printer list in System Prefs, then re-add it. After this it would print fine for a day or so.
Since upgrading to 10.9.4 I can't get anything to print from the Dymo at all. It still frequently disconnects, but once it is connected jobs just hang in the printer queue, and I get the message 'unable to get InputSlot choice'. I've tried pausing/resuming, tried the usual re-adding of the printer, even removed all Dymo software and reinstalled as a completely new printer. Nothing going.
I installed the latest Dymo software (8.5.1) a few months back when it was released, and the printer is connected directly to the Mac as it always has been.
Any ideas?
Mac Pro, OS X Mavericks (10.9.4)