hi,
I am doing the multi master replication. i git erreos executing the below staemet
BEGIN
DBMS_REPCAT.ADD_MASTER_DATABASE(
gname => '"G10"',
master => 'ORCL.US.ORACLE.COM',
use_existing_objects => TRUE,
copy_rows => TRUE,
propagation_mode => 'SYNCHRONOUS');
END;
/

Error:

BEGIN
*
ERROR at line 1:
ORA-00439: feature not enabled: Advanced replication
ORA-06512: at "SYS.DBMS_SNAP_INTERNAL", line 302
ORA-06512: at "SYS.DBMS_REPCAT_MAS", line 2115
ORA-06512: at "SYS.DBMS_REPCAT", line 146
ORA-06512: at line 2
Can any body help in this??/