Cause
The system could not find a control file of the specified name and size.
The system could not find a control file of the specified name and size.
Check that ALL control files are online and that they are the same files that the system created at cold start time.
Try the following links for this error:
http://docs.oracle.com/cd/E16655_01/server.121/e26079/e0.htm
http://docs.oracle.com/cd/E16655_01/backup.121/e17630/osadvsce.htm
https://community.oracle.com/message/3810396
https://community.oracle.com/message/2353585
https://community.oracle.com/message/1962459
https://community.oracle.com/message/10014282
https://community.oracle.com/message/4492961
https://community.oracle.com/message/4529600
https://community.oracle.com/message/1172201
https://community.oracle.com/message/3813115
https://community.oracle.com/message/1582245
https://community.oracle.com/message/9608926
https://community.oracle.com/message/76534
https://community.oracle.com/message/2335466
https://community.oracle.com/message/1902504
https://community.oracle.com/message/1293764
https://community.oracle.com/message/3992377
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