Preparing to start a MVS™ MAS
Before you start a MAS, create your data sets, change startup JCL, activate external connections, review system initialization parameters, and prepare your logs.
Start any MASs (that is, the CICS® systems the CMAS is to manage) after the CMAS, because a CICS system is unknown to CICSPlex® SM until the CMAS with which the CICS system is associated is started.
Note: If a MAS specifies a CMASSYSID and the CMAS is active
but does not manage the CICSplex, the MAS waits until the specified
CMAS is managing the CICSplex before it joins the CICSplex. This behavior
is the same as when CMASSYSID is not specified.