As per original poster this is the error messag he is getting when job abends.
"IGD07002I VOLUME D01G20 NOT AVAILABLE"
In my understanding D01G20 is the volume serial number which is causing this problem. And as he mentioned this is causing the job to fail everyday, I was just confirming if the same Volume number comes every day in the error message.
If Yes, there might be a problem with volume mount at the time job runs. Storage Admin Team for that shop should be able to give an exact answer for this problem.