Updating netbackup server list via script
Give the Administrators group and SYSTEM full control.
This error message is related to the Volume Shadow Copy Service (VSS) writer for a particular application.
Early on, the error was commonly accompanied by a message indicating the tape drive needs to be cleaned.
If that doesn't work, check the Application and System logs in Event Viewer.
The log entries should give you a hint as to the cause of the problem.
It is important to note that an E00084EC error does not necessarily indicate that there is a problem with the backup medium itself.
The error can also be caused by a communication problem between the backup server and the backup target.