If RMC isn't working properly, first check to see if the RMC daemon (ctrmc) and the resource managers are running by running the lssrc command, as follows:
lssrc -a
At least ctrmc, IBM.ERRM, and IBM.DMSRM should be running. (Some of the other resource managers are not started until they are needed.) If you need to restart RMC, run the rmcctrl command with the -z option, as follows,
rmcctrl -z
and then again with the -s option:
rmcctrl -s
After you are sure that RMC is running, run the lsrsrc command to see if the RMC daemon is responding and what resource classes it knows about. Some of the important classes are: IBM.ManagedNode, IBM.NodeGroup, IBM.Condition, IBM.EventResponse, and IBM.Association. You can list the contents of any of these classes by using the lsrsrc command.