If you register a user SVC statically in Business Continuity Manager versions earlier than 8.5.1, you need to define the SYMDEF statement (the &YKSVCNO system symbol). Therefore, if there are instances of Business Continuity Manager versions earlier than 8.5.1, you must define the following SYMDEF statement in the IEASYMxx parmlib member.
SYMDEF(&YKSVCNO='SVC-number')