For new CSM installs: MSMInstaller.jar should go to the same directory where MSMSetup.sh or MSMSetupOptionsFile.properties files are. MSMOptValGen.jar should go to /lib sub-directory under the above mentioned one.
Please see the attached CSM_GIMAPI.zip. It includes CSM_Jars.zip and some instructions in CSM_GIMAPI.txt
Existing CSM user having a similar problem please see KB000124412
After following the directions and getting during MSMInstall:
MSMI0583E: File ./SAMPLIB/CSMN6101 could not be found
then the wrong MSMInstaller.jar has been copied over.