MSMTC log shows an error message
MSMF0081E - CA CSM verification of managed product USS file systems finished with errors.
when looking further down more details can be found:
MSMF0035E - Managed product USS file system <datasetname> is not mounted to <path>
MSMF0034E - Managed product USS file system <datasetnameA> should be mounted to <path>. CA CSM found <datasetnameB> to be mounted.
During its initialization CA CSM Mount Point Manager is verifying CA CSM software catalog USS file systems.
CA CSM found at least one managed product USS file system not to be mounted.
Release : 6.0 and 6.1
Component : CHORUS SOFTWARE MANAGER
At next CSM start the messages should no longer occur.
in this particular case the CA Common Services 15.0 path definition in DDDEF CFF6PLAT where incorrect.
After changing them and verifying that they are correctly mounted, the CSI had to be removed and re-migrated.