During subsystem initialization, the subsystem must request the SMF accounting parameter values from SMF. The subsystem uses the SMFSUBP macro to retrieve the parameter value that the installation requested. If the macro request is successful, the system returns a pointer to the specific parameter value. The system returns a non-zero return code if errors are encountered during the macro's processing. See z/OS MVS System Management Facilities (SMF) for more information on the SMFSUBP macro.