Oracle : Ошибка ORA-31671

"Worker process %s had an unhandled exception."
*Cause: A Data Pump process model worker process had an unhandled exception
*Action: Refer to any following error messages for possible actions. Check
the trace log for the failed process to see if there is any
information about the failure. Correct the error, if possible, and
try the operation again. If the error occurs again, contact Oracle
Customer Support and report the error.

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