Hello,
This error can occur when VERITAS Backup Exec (tm) has lost communication with the device. Disabling the device, deleting the device, and cycling services will force Backup Exec to rescan the SCSI bus for devices, and re-establish communication with the Tape Device.
To do this, perform the following steps:
1. From the Devices tab, right-click on the existing device and select Properties
2. Select the Configuration tab, and clear the Enable device for Backup Exec checkbox and then click OK
3. Right-click on the device again, and select Delete
4. Quit Backup Exec for Windows NT and Windows 2000
5. Stop and restart all the Backup Exec services
6. Start Backup Exec. The device should be displayed.
Note 1: If the device is "Disabled," right-click on the device, select Properties, select the Configuration tab, and select the Enable device for Backup Exec option.
Note 2: If the device is not present, see the Related Document "How to troubleshoot issues with the "Robotic Library" and "Tape Drives" in VERITAS Backup Exec (tm) for Windows Servers.
7. Edit the backup job to use the new device
NOTE : If we do not receive your reply within two business days, this post would be marked assumed answeredand would be moved toanswered questions pool.