Cause
An attempt was made to start a second media recovery operation in the same session.
An attempt was made to start a second media recovery operation in the same session.
Complete or cancel the first media recovery session or start another session to perform media recovery.
Try the following links for this error:
http://docs.oracle.com/cd/E16655_01/server.121/e26079/e0.htm
https://community.oracle.com/message/11346252
https://community.oracle.com/message/10529587
https://community.oracle.com/message/1786603
https://community.oracle.com/message/10963207
https://community.oracle.com/message/11027666
https://community.oracle.com/message/2342086
https://community.oracle.com/message/10424578
https://community.oracle.com/message/9819536
https://community.oracle.com/message/2001858
https://community.oracle.com/message/10175186
https://community.oracle.com/message/4514684
https://community.oracle.com/message/2037654
https://community.oracle.com/message/10426147
https://community.oracle.com/message/10424125
https://community.oracle.com/message/12238883
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