ScanFront uses memory to scan documents. This memory usage differs according to conditions such as document size and resolution. When setting scanning conditions that require a large amount of memory capacity, an error message saying "Not enough memory to execute current scanner settings" may appear and you may not be able to scan the document.
Check the connections of the AC adapter and power plug. If the problem is not resolved after checking the connections, contact your local authorized Canon dealer.
Scratches on the scanning glass may cause streaks on scanned images, as well as feeding errors . Remove any dirt from the rollers using a cloth that has been soaked in water and thoroughly wrung out.