You can use base control program internal interface (BCPii) services to connect an authorized z/OS application to System z configuration resources (such as CPC, image, capacity record, or activation profile data) and to allow that application to potentially modify these resources.

To use base control program internal interface (BCPii) services, issue calls from high level language programs. Each service requires a set of parameters coded in a specific order on the CALL statement.

This topic describes the CALL statements that invoke BCPii services. Each description includes a syntax diagram, parameter descriptions, return and reason code explanations with recommended actions. Return and reason codes are shown in hexadecimal and decimal with the associated equate symbols.