DFSMShsm discovered the volume that is needed for input was in CAPACITYMODE(EXTENDED) during an ABACKUP operation from an ML2 volume. CAPACITYMODE switchable drives are not supported by this level of DFSMShsm.
Perform the ABACKUP operation with DFSMShsm MVS™ V1R5 or higher. An alternative is to recall the needed data sets and rerun ABACKUP.
DFSMShsm