BPXOINIT is the started procedure that runs the initialization process. If you are using CBPDO, you have to set up BPXOINIT as a started procedure by adding it to either the RACF® STARTED class or the RACF started procedures table, module ICHRINO3, as explained in Steps for preparing RACF.

BPXOINIT is also the job name of the initialization process and is shipped in SYS1.PROCLIB.

The STEPLIB DD statement is propagated from OMVS to BPXOINIT. If there is a STEPLIB DD statement in the BPXOINIT procedure, it is not used if a STEPLIB DD statement was specified in the OMVS procedure.