0 Check In - Labels Not Printing 6 James Temens posted 6 Years Ago I have a Windows 2012 server setup with RockCMS and a Windows 10 desktop PC that has the RockCMS CheckIn Client installed. The Zebra printer is connected via USB to the Windows 10 desktop PC and I'm able to print a test page to the Zebra printer. When I run the RockCMS client and attempt to check in the Zebra label printer doesn't print the label. I then decided to use the Chrome web browser on the Windows 10 desktop PC to CheckIn so I could try and use the debugger tools to see what was going on - in the console I am receiving an error that says, "window.external.PrintLabels is not a function". Any ideas? I have shared the printer with the Rock CMS server, turned off both firewalls (Windows 10 PC and server), verified I can ping both the server and client, and I still am unable to print.