Canon MG7700 Series Online Manual page 912

3412
Cause
Scanning original has failed.
What to Do
Tap OK on the touch screen of the machine, and then follow the actions below.
• Make sure that the original is placed on the platen glass.
• Make sure that the original is set in the correct position and orientation.
After carrying out the above actions, retry scanning or copying.
If the error is still not resolved, specify the size of the original.
Important
• The original that is smaller than 1.2 inches (3 cm) square may not be scanned correctly.
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