If you have upgraded your N1 System Manager system from an older version, you must also upgrade the provisionable server management agents to the most recent version using either of the two following methods:
Run the management agent upgrade script agentupgrade to upgrade the management agent for all powered-on and healthy provisionable servers. See Upgrading the Provisionable Server OS Monitoring Agents in Sun N1 System Manager 1.2 Installation and Configuration Guide.
Use the add osmonitor command with the upgrade parameter to update the management agent on a provisionable server. See To Upgrade the OS Monitoring Feature on a Server in Sun N1 System Manager 1.2 Administration Guide.