Problem: DBCA 10.2.0.1 tries to connect to RAC database with SID=RACT1 when adding a new RAC node --> Dbca fails with ORA-12519 Fix : Configure static listener configuration Add to your listener.ora SID_LIST_LISTENER_RACT1 = (SID_LIST = (SID_DESC = (SID_NAME = RACT1) (ORACLE_HOME = /u01/app/oracle/product/10.2/rac_db1) ) ) Restart listener [oracle@ract1 ~]$ lsnrctl stop LISTENER_RACT1 [oracle@ract1 ~]$ lsnrctl start LISTENER_RACT1 .. Service "RACT1" has 1 instance(s). Instance "RACT1", status UNKNOWN, has 1 handler(s) for this service... .. --> Service RACT1 is available now Create a new tnsnames.ora with SID entry and test it R1 = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = ract1vip.example.com)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SID = RACT1) ) ) [oracle@ract1 ~]$ sqlplus scott/tiger@R1 Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - 64bit Production With the Partitioning, Real Application Clusters, OLAP and Data Mining options SQL>