Oracle : Ошибка ORA-39159

"cannot call this function from a non-Data Pump process"
*Cause: Called a Data Pump process model function from a process which is
not a Data Pump process.
*Action: Refer to any other 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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