Cause
The attempted operation cannot be executed at this time because another process currently holds the snapshot control file enqueue.
The attempted operation cannot be executed at this time because another process currently holds the snapshot control file enqueue.
Retry the operation after the concurrent operation that is holding the snapshot control file enqueue terminates.
Try the following links for this error:
http://docs.oracle.com/cd/E16655_01/server.121/e26079/e0.htm
https://community.oracle.com/message/2601348
https://community.oracle.com/message/10364560
https://community.oracle.com/message/4510904
https://community.oracle.com/message/1619435
https://community.oracle.com/message/4138818
https://community.oracle.com/message/3397387
https://community.oracle.com/message/3397386
https://community.oracle.com/message/3915600
https://community.oracle.com/message/3912578
https://community.oracle.com/message/3397377
https://community.oracle.com/message/1754659
https://community.oracle.com/message/5232049
https://community.oracle.com/message/3253816
https://community.oracle.com/message/4575233
https://community.oracle.com/message/2697240
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