After running for almost 23-hours, the LOADDB process terminated with:

ANR9999D PVRNTP(2536): RC 0x0 Reading cartridge block 00026776 to ddname
SYS00040.
ANR0664E LOADDB: Media not accessible in accessing data storage.
ANR1364I Input volume M00750 closed.
ANR5209I Dismounting volume M00750 (read-only access).
ANR9999D DLLOAD(1249): Premature End of Dump - Missing Volumes ?
VCS0201E  **** DATA LOST - VCSS NOT OPERATIVE ****
ANR4032I LOADDB: Copied 2236928 database records.
ANR4033I LOADDB: Copied 351 bit vectors.
ANR4035I LOADDB: Encountered 0 bad database records.
ANR4036I LOADDB: Copied 78859100 database entries.
ANR4037I LOADDB: 4919 Megabytes   copied.
ANR4005E LOADDB: Database load process terminated due to error (-1).
ANR2106I : Quiescing database update activity.
ANR2107I : Database update activity is now quiesced.

Ended up restoring from the day before's database backup. Gonna be some
upset people in the A.M.

Bill Boyer
"Some days you are the bug, some days you are the windshield." - ??