During migration for the indicated volume, the server cannot move the data from the volume because there is not enough space on the next storage pool, or the next storage pool is not defined.
Migration of the volume stops. If other migration processes are running, these processes will continue migration.
Ensure that the next storage pool is defined, and make more space available in the next storage pool. Use the UPDATE STGPOOL command to change the next storage pool to one with more space.