Canon MP490 series On-Screen Manual page 645

Make sure that a port named USBnnn (where "n" is a number) with Canon XXX Printer
appearing in the Printer column is selected for Print to the following port(s).
If the setting is incorrect, reinstall the MP Drivers or change the printer port to the correct one.
Check 6: Is the size of the print data extremely large?
Click Print Options on the Page Setup sheet. Then, select the Prevent loss of print data check box in
the displayed dialog.
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