Event ID 58053: "Robotic library hardware error. The robotic library has reported a general hardware error condition"

Problem

Event ID 58053: "Robotic library hardware error. The robotic library has reported a general hardware error condition. Manual intervention, calibration, etc. may be required. This may be a device related hardware problem, or it may be some other hardware problem (i.e. SCSI card/bus etc.). The library and drive states have been set to offline."

Error Message

Event Viewer reports the following error :

Event ID: 58053
Source: Backup Exec
Type: Error
Description: Backup Exec Alert: Device Error (Server: "%server%") Robotic library hardware error.
The robotic library has reported a general hardware error condition. Manual intervention, calibration, etc., may be required. 

OR

Event ID: 58053
Source: Backup Exec
Type: Error
Description: Backup Exec Alert: Device Error (Server: "%server%") The robotic library hardware is offline!

Error in Job Log :

 "V-79-40960-33045 - Physical Volume Library Drive or Robot Paused, Offline, or Disabled" 

Cause
 

1) The alert was reported in the Event Viewer Application Log because a hardware error occurred with the robotic library.

2) If the medium changer is not recognized by the Operating System, the above errors can be seen as well.

3) The device developed a hardware fault.
 

Solution
 

4) unlock the library and put the tape back in the slot and retest the backups to check if same error is repeated.