If DFSMShsm ends abnormally because it does not have enough virtual storage available (ABEND codes S878, S80A, or S106-C), take corrective action by decreasing the level of multitasking. This is especially true for the number of backup tasks, migration tasks, and dump tasks.

If the maximum region size is not requested, a smaller region size can be used with a corresponding decrease in the level of multitasking. It is best not to specify a region size, allowing DFSMShsm to use all the space that is available.