During a DFSMShsm backup operation, an attempt was made to allocate space for the new backup copy of the data set identified in message ARC1001I. The allocation routine passed back a return code of 12, indicating there was no space on the volume, the VTOC was full, or the index to the VTOC was full.
The backup operation ends. DFSMShsm processing continues.
Provide more space on backup volumes for DFSMShsm. The DFSMShsm LIST or HLIST command can be used to determine the volumes in question.
If the failed request was a data set backup, then the failure occurred on ML1 volumes. Provide more ML1 space for backup versions and consider providing 1 or more ML1 volumes with the OVERFLOW attribute.
DFSMShsm