Incorrect paper size, open [paper source]  [34]

Try one or more of the following:

• Load the correct size and type of paper in the tray, and then specify the paper size and type in the Paper menu on the printer control panel.
• Make sure the correct paper size and type are specified in Print Properties or the Print dialog settings.
• Check if the paper size is correctly set. For example, if MP Feeder Size is set to Universal, then make sure the paper is large enough for the data being printed.
• Check the length and width guides and make sure the paper is loaded properly in the tray.
• From the printer control panel, touch Continue to clear the message and print using a different tray.
• Cancel the print job.