If you are having problems printing labels with your Rollo printer, the best place to find information is with Rollo's troubleshooting guides.
The label is not printing (Windows)
If your Rollo printer is showing a green light but no label is advanced when you click on "Print", it most likely is that Rollo is connected to a new USB Port. When the USB port changes, Windows will register Rollo as a "new" printer so that you can run multiple Rollo printers from the same computer, each with different label types and settings.
That means printing to the old printer keeps it in the print queue. To resolve the issue follow the steps below.
Go to the Start Menu and open the Control Panel, select “Devices and Printers” and note which Rollo Printer is "active". (You can delete the duplicates by right-clicking the printer name and selecting "Remove device" if needed.)
Then, be sure to print to the same active printer’s name when printing.
If that doesn't work, unplug and re-plug Rollo into the same USB port as before. This should restore your printing without further changes.