Lexmark XM7370
Notes:
Open a web browser, and then type the printer IP address in the address field.
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.