Data Guard :: Physical Standby Configuration

I did the all necessary steps required for the physical standby configuration. My standby db is mounted but not able to open.

Below are the steps.

SQL> startup mount

ORACLE instance started.

Total System Global Area 1845493760 bytes

Fixed Size 2021568 bytes
Variable Size 452986688 bytes
Database Buffers 1375731712 bytes
Redo Buffers 14753792 bytes
Database mounted.

SQL> ALTER SYSTEM SET LOG_ARCHIVE_DEST_2='SERVICE=demodb' scope=both;

System altered.

SQL> ALTER SYSTEM SET LOG_ARCHIVE_DEST_STATE_2=ENABLE SCOPE=BOTH;

System altered.

SQL> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE DISCONNECT FROM SESSION;

Database altered.

SQL> recover managed standby database cancel;
Media recovery complete.
SQL> alter database open read only;
alter database open read only
*
ERROR at line 1:
ORA-16004: backup database requires recovery
ORA-01152: file 1 was not restored from a sufficiently old backup
ORA-01110: data file 1: '/u002/app/OraDB10g/stdemo/oradata/system01.dbf'

SQL> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE FINISH; ALTER DATABASE RECOVER MANAGED STANDBY DATABASE FINISH
*
ERROR at line 1:

ORA-00600: internal error code, arguments: [kcrfrsetnab_found], [1], [136], [],
[], [], [], []
ORA-00600: internal error code, arguments: [kcrfrgv_scn7], [], [], [], [], [],
[], []

SQL> ALTER DATABASE COMMIT TO SWITCHOVER TO PRIMARY;

ALTER DATABASE COMMIT TO SWITCHOVER TO PRIMARY
*
ERROR at line 1:
ORA-00600: internal error code, arguments: [kccocx_01], [], [], [], [], [], [],
[]