program-name: exec-name function-name operation config-DD-name: member-name; CPB=cpb-address
Debug message issued by VNCRXF12, the GETCFG function that reads agent configuration files. The function has opened the PDS member, but not started reading the records it contains.
In the mesage text, operation=READ. In a standard agent installation, config-DD-name:member-name=VNCCFG:VNCCFG00. Or it equals whatever member name the user specified as the first parameter of the OBEYFILE exec.