Uniprint or Blueprint? The Pharos Alerts Code list doesn't show a 29084. I haven't had the exact same error code pop up, but at the risk of stating the obvious, have you tried restarting the Pharos print services.?
This is Uniprint 9. Yes, restarting the print server service gets the same error. We've rebooted both print servers and principal server, no luck. Will probably file a support incident before I wipe and reinstall.
I'll assume that the offline billing is on. There are some batch files on the Pharos CD that you can use to verify that the system is hitting the bank and getting a response "balance.bat and debit.bat". You might try uninstalling just the print service and then reinstalling it.
When you get an answer from support, can you please post it? I'm curious.