Cause
the PARALLEL keyword was used alone or DEGREE DEFAULT was specified in the PARALLEL clause of an ALTER DATABASE RECOVER command.
the PARALLEL keyword was used alone or DEGREE DEFAULT was specified in the PARALLEL clause of an ALTER DATABASE RECOVER command.
respecify with an explicit degree of parallelism.
Try the following links for this error:
http://docs.oracle.com/cd/E16655_01/server.121/e26079/e12700.htm
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