Canon PIXMA MG4200 Series On-Screen Manual page 935

Does the piece of paper remain in the right side or the left side space (B) inside the machine?
7.
Close the paper output cover, then reload the paper.
All print jobs in the queue are canceled. Reprint if necessary.
Note
If the message about paper jam is displayed on the computer screen when you resume printing
after removing all the jammed paper, a piece of paper may remain inside the machine. In this
case, confirm that no piece of paper remains inside the machine.
If you cannot remove the paper or the paper tears inside the machine, or if the paper jam error continues
after removing the paper, contact the service center.
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