Lexmark XC8160
You may need administrative rights to access the application.
Open a Web browser, and then type the printer IP address in the address field.
Notes:
Click Apps > QR Code Generator > Configure.
Do either of the following:
Apply the changes.
Unable to downgrade code; Green Micro
An “Invalid Engine Code” error message indicates a problem with one of the internal operating programs of the printer. The printer is not able to receive, and process print jobs until the printer is reset.