Oracle : Ошибка ORA-39160

"error on whats my name call"
*Cause: Attempt to get the Data Pump process name failed.
*Action: Refer to any following error messages for additional information.
If this error occurs from a Data Pump client (e.g. expdp or impdp),
try the operation again. If the error occurs again, contact Oracle
Customer Support and report the error.

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