RMAN Catalog RC_BACKUP_FILES View access Issue

When I am trying to access RC_BACKUP_FILES view from our RMAN Catalog database,  getting following error ..

SQL> select count(*) from RC_BACKUP_FILES;

select count(*) from RC_BACKUP_FILES

*

ERROR at line 1:

ORA-20021: database not set

ORA-06512: at "RCAT_EMB.DBMS_RCVMAN", line 26137

ORA-06512: at "RCAT_EMB.RC_LBRECSETIMPL_T", line 69

Workaround:

It is usually more convenient to access this information using the LIST BACKUP and LIST COPY  commands from within RMAN.

We must use DBMS_RCVMAN.SetDatabase to select a database from the recovery catalog schema before you can use this view.

SQL> SELECT NAME,DBID FROM V$DATABASE;

NAME            DBID

--------- ----------

XXXXXX 3430087157                                                                                                                                                                        

DBID  => 3430087157

SQL> CALL DBMS_RCVMAN.SETDATABASE(null,null,null,3430087157,null);

Call completed.

SQL> select count(*) from RC_BACKUP_FILES;

  COUNT(*)

----------

     27762

-ANIL12CDBA