In Business Continuity Manager version 8.5.1 or later, when statically registering a user SVC by using the IEASVCxx parmlib member, you do not need to define the SYMDEF statement (the &YKSVCNO system symbol) in the IEASYMxx parmlib member.
Disable (comment out) the SYMDEF statement in the IEASYMxx parmlib member.
/* SYMDEF(&YKSVCNO='SVC-number') */