Sometimes Canon transports will deny connections. The is usually caused by the following:
- an application closed without shutting down its connection to the scanner properly
- an unrecoverable error (http://www.sbulletsupport.com/forum/index.php?topic=110.0) occurs
If rebooting the workstation is insufficient to allow a connection, following steps will reset the scanner:
1. Close all scanning applications.
2. Power down the scanner.
3. Disconnect the scanner from the workstation.
4. Disconnect the scanner from its power supply (preferably for at least 30 seconds).
5. Restart the workstation.
6. Reconnect the scanner to its power supply and turn on.
7. Wait for the scanner to run through its power up cycle.
8. Reconnect the scanner to the workstation.