Canon MB5450 Series Online Manual page 1257

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Cause
Cassette 1 and cassette 2 are not inserted.
What to Do
Insert the both cassettes.
Note
• Once the cassette is installed, the screen for setting cassette paper information appears. Set the
paper information for the paper in the cassette 1 and the cassette 2.
• To cancel printing, press the printer's Stop button.
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