Canon DR-5020 Instructions Manual page 61

2.3 Various Scanning Modes
• If the actual number of scanned pages is less than the number of
pages displayed on the counter display:
The counter display changes to "U02" to indicate a verify count error. Go
back and start counting the number of pages in the document again.
A probable cause is that double-feed is occurring. Check to see if all
pages in the document have been scanned or not.
2
A
To reset the error display, press the Stop key.
MEMO
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