I am having problems starting up MSMTC on z/OS 2.1 for the first time. z/OS 2.1 was recently implemented. This is the first attempt to start CA CSM on our z/OS 2.1 system. I did not have this issue on z/OS 1.13.
While there may be any number of concerns the first thing to verify is that you are running a supported version of Java. This is documented in the CA Chorus Software Manager Site Preparation Guide. When defining the version of Java be sure that the correct Java path is defined and the correct Java program is specified
Update member MSMLIB in the CA CSM runtime SAMPLIB library and set the JAVA HOME path.
Update your MSMTC startup JCL to reference the correct program on the EXEC PGM= statement.
eg. If JAVA_HOME = /usr/lpp/java/J7.1_64 then PGM=JVMLDM77
At this time Java 8 is not supported. See Knowledge Document TEC1785411