During command data set migration to ML 2 tape, a tape migration volume could not be mounted because either a tape or a device was not available.
The migration request failed. DFSMShsm issued an ARC12nnx message giving specific reasons for the failure. All additional command data set migrations to ML 2 tape will be inhibited. A WAIT-type command will be failed with ARC1205I. A NO-WAIT-type command will be requeued to be processed when the ML 2 target is available and a RELEASE MIGRATION command has been issued.
Until a RELEASE MIGRATION command is issued, DFSMShsm will not attempt to process any command data set migrations that require ML 2 tape.
When a ML 2 target is available for command data set migration, issue the RELEASE MIGRATION command.
DFSMShsm