Tape vaulting task could not find useable volume

The vaulting task may end with an error and the log indicate that scratch media was not found, and the task could not find useable volume for saving dataset. See example from log:

Attempting to identify MON005L6
Verifying on ANSI volume information...
Verifying on media volume information...
Verifying on ANSI volume information...
Verifying on media volume information...
Volume Verified!
Volume MON005L6 has been identified. Status Saved : TRUE
Scratch media was not found
Could not find useable volume for saving dataset

Synchronize task completed on Tue Mar 19 2019 at 12:14 AM.
______________________________________________________________________________

Analysis:

Archives detected: 13
Catalogs processed: 46
Items processed: 10560380 (7,824,542,284,522 bytes)
Files synchronized: 9428362 (7,824,542,284,522 bytes)
Items transferred: 0

Errors: 1
______________________________________________________________________________


Last result: No media is currently available in this media pool or library. (4308L)

You may have a volume assigned to a volume set, and the volume in the tape drive when this error occurs. In this case, run a volume status command to see if the volume (tape) is enabled for use.

Refer to How to open a command prompt as administrator and change to the installation directory

Type:
vlm volume status -volume [volume name]
Hit enter.

Review the output for the Enabled status. See image.

c:\Program Files\Quantum\DATASTOR Shield\Server>vlm volume status -volume mon005l6

Volume Library Manager Command Tool (64-bit) Version 9.0.1800.1
Copyright (C) 2005-2018 Data Storage Group, Inc. All rights reserved.

 Name............... MON005L6 *Assigned* *No Barcode* ~Appendable~
 Description........
 VolumeTag.......... MON005L6
 ...
 VolumeType......... *Tape*
 Enabled............ FALSE

The if the output indicates Enabled=FALSE run a property command to set Enabled=TRUE.

vlm volume property -volume [volume name] -prop Enabled=TRUE
See example:

c:\Program Files\Quantum\DATASTOR Shield\Server>vlm volume property -volume mon0
05l6 -prop Enabled=TRUE

Then, run the status command again and review the output to confirm that the Enabled status is TRUE.