<ORACLE_HOME>bin/emca -deconfig dbcontrol db
SELECT username FROM dba_users WHERE username in ('SYSMAN', 'MGMT_VIEW ');
drop user sysman cascade; drop role MGMT_USER; drop user MGMT_VIEW cascade; drop public synonym MGMT_TARGET_BLACKOUTS; drop public synonym SETEMVIEWUSERCONTEXT;
<ORACLE_HOME>/bin/emca -config dbcontrol db -repos recreate