I have an old VB6 app I wrote back when we first switched to XP. Within the last year or 2, we switched to win7. We've been using it without issues on about 30 different computers. Overnight, it stopped working on a specific computer. Reinstalled the printer (it's just a Generic/Text printer driver - zebra barcode printer) and still no luck. They started printing from a computer beside it to get stuff down. Now, about 3 weeks later, this other computer can no longer print to this printer. The job doesn't even show up in the queue. Both computers print to other printers just fine. They also cannot print to another zebra printer in a different lab.

It's a corporate environment, all computers are the same models and windows builds. All updates are remotely pushed by IT.

Here's a simplified version of the code.

Code:
Set Printer = Printers(lstPrinters.ListIndex)
Printer.Print "^someZPLcode"
Printer.Print "^moreZPLcode"
Printer.Print "^lastZPLcode"
Printer.EndDoc
As stated, it still works fine from all of the other computers, but the 2 that it's not working on seem to be the most dependent on the software.

There's no error and it doesn't show up in the printer queue. Any suggestions would be great.