ORA-19752: block change tracking is already enabled


bash-3.2$ sqlplus "/ as sysdba";
SQL*Plus: Release 11.2.0.3.0 Production on Thu Jan 22 09:24:24 2015
Copyright (c) 1982, 2011, Oracle. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> select name,open_mode from gv$database;
NAME OPEN_MODE
--------- --------------------
AZKKTST READ WRITE
SQL> 
SQL> alter database enable block change tracking using file '/u01/app/oracle/admin/AZKKTST/rman/block_change.log';
alter database enable block change tracking using file '/u01/app/oracle/admin/AZKKTST/rman/block_change.log'
*
ERROR at line 1:
ORA-19752: block change tracking is already enabled
Solution:
SQL> alter database disable block change tracking;
Database altered.
SQL> alter database enable block change tracking using file '/u01/app/oracle/admin/AZKKTST/rman/block_change.log';
Database altered.



		

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