If you are using Global Resource Serialization (GRS) and all systems are connected in a GRSplex, set N as the value of CTTRSRV in the IOA PARM library. No statements are required in SYS1.PARMLIB(GRSRNLxx).

If you are using Global Resource Serialization (GRS) and not all systems are connected in a GRSplex, set Y as the value of CTTRSRV in the IOA PARM library. The following statements are required in SYS1.PARMLIB(GRSRNLxx):

RNLDEF RNL(EXCL) TYPE(GENERIC) QNAME(control-m/tape qname)