The DFHHPSVC module must be defined to MVS™ as a Type 6 SVC; the default HPO SVC number defined in the DFHSIT module is 215. If you want to change the default Type 6 SVC number:
If you are not using HPO, you should not load the DFHHPSVC module into the MVS nucleus. You choose to use HPO explicitly by coding HPO=YES in the system initialization table (SIT).
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