How to pedict media are stuck or not from robtest

Hi there is lots of issue releted to media stuck in SL500 & L180 tape library

each time backup stuck i need to check media allocation through nbrbutil -dump if allocation is not there i attempt to unload that media from robtest

& conclude whether it is stuck or not (library vendor is diffrent i just raise issue with them)
 

is ther any ohter way to find out media stuck from robtest or any other NBU command which will make this task bit easy.

Thanks