CanoScan Scanner Error Code 201

Can anyone help me please? I am helping a friend on this concern. My friend’s CanoScan3000Fscanner had this error message appeared on his computer’s monitor when he did some scanning jobs saying “Error in scanner.
Turn off scanner and follow instructions in manual. Scanner driver will be closed.(Code: 201).” The available option directed me to click the OK button.
When I clicked it, this second error message occurred “There is a TWAIN error. Maybe the device is not connected.”
I had checked the cables and everything was normally mounted into its proper ports. I had already uninstalled the driver and reinstalled it hereafter but the same error appeared.
I had also visited the website of Cannon and had followed every detail on how I can fix the problem but I found it not helpful to my concern.
Any valuable help will be appreciated.
