The restoration process is stalled

You have: 

Barcode.        MediaID
PW5060L4     5060L4  HCART TLD Active 0. <<< Delete this tape from NetBackup
PW5060         PW5060 HCART  NONE 12333339

If the barcode is different, even though the tape is obviously the same, it is treated as a different tape.

The top tape have 0 bytes so is empty - just delete it so it disappears.

The 2nd tape in the list is the one we want, we see from job details

Media needed  PW5060

The problem is, this is showing as NONE, so according to NetBackup it is not in the library.
This is usually easily rectified, by running an inventory, it would then appear as TLD with an associated slot number.  However what I think is happening (based on the first entry above) is that the library settings have been changed, and the barcode is now displayed as all 8 characters, when previously it was only 6.  Because of this, it is treated as a new tape - we see this as it has a slot number and shows as TLD, whereas the tape we really want is showing as NONE (ie. NetBackup thinks the tape is not in the library (non-robotic))

NetBackup has no control over the barcode, it simply asks the library ‘what tapes do you have’ and the library sends across the info,  (it is a massive misconception that NetBackup ‘looks’ in the library during an inventory, 100% wrong, it asks and is told - there is a massive difference). 

There are two options:

Method 1

1.  Delete the tape with barcode PW5060L4 (it has 0 bytes so should be ‘scratch’)
2.  vmchange -barcode PW5060L4 -m PW5060

1. Run inventory
   
   This will make the 2nd tape above have the barcode that the library is displaying to NBU, it will then be assigned a slot number and the restore should work.
   
   OR, method 2
   
   1.  Delete the tape with barcode PW5060L4 (it has 0 bytes so should be ‘scratch’)
   2.  In the library settings, change the characters in the barcode from all 8 to the first 6
   
   ( I am not sure how this is done on a HP library, it will be an option somewhere in the library console, in the tech note I mentioned (https://www.veritas.com/support/en_US/article.100048567  ) I show how to do it on a Quantum library, HP will have a similar setting (all libraries work basically the same way).

3. 
   Run inventory
   
   What will happen, is that the library will tell NetBackup about tape with barcode PW5060 and NOT PW5060L4, NetBackup will then match this to the tape it already knows about with Medicaid PW5060
   
   What you need to determine is what the other tapes show their barcode as because you could get this issue on other tapes in the future.  If only this one tape is affected then the 2nd method is more suitable.  If all the tapes are affected then method 1.
   
   Ultimately, NBU hold a database of the tapes, these days it's all part of the NBDB / 'EMM' database, but historically (back from pre NBU 6.0) it was known as the volume db - you need to ensure that the barcode in the NetBackup DB matches what the library is displaying to NetBackup.  You either change the library, or change the barcode of each tape as I have shown above.
   
   If you run :
   
   robust , then <select library> if you have more than one
   s s.    (= show slots)
   
   This will send a scsi command to the library that makes it display the tapes/ slots - the barcode shown, is what would be sent to NetBackup if you ran a real inventory.  Changing the way the library displays the barcode in the library console, would change how the barcode is displayed in the 's s' command. (note:  be sure to exit robust)