Oracle : Ошибка ORA-22287

"invalid or modified directory occurred during %s operation"
*Cause: The directory alias used for the current operation is not valid
if being accessed for the first time, or has been modified by
the DBA since the last access.
*Action: If you are accessing this directory for the first time, provide
a valid directory name. If you have been already successful in
opening a file under this directory before this error occured,
then close the file and retry the operation with a valid
directory alias as modified by your DBA. Oracle recommends that
directories should be modified only during quiescent periods.

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