Cause
The attempted operation could not be executed at this time because this process had an alternate control file open for fixed table access.
The attempted operation could not be executed at this time because this process had an alternate control file open for fixed table access.
Retry the operation after calling cfileUseCurrent.
Try the following links for this error:
http://docs.oracle.com/cd/E16655_01/server.121/e26079/e0.htm
https://community.oracle.com/message/1489616
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