An application must be authorized to use the following
interfaces for HPDT services:
- APPCCMD with OPTCD=XBUFLST
- Like all other APPCCMD requests, HPDT requests under SRB control
are always considered authorized. Requests under a TCB, however, must
specify BRANCH=YES. VTAM® prevents
a TCB mode requester that has not identified itself as authorized
from using HPDT services.
- IVTCSM macroinstructions
- All IVTCSM requests must be from an authorized application program.