Oracle : Ошибка ORA-19669

"proxy copy functions cannot be run on DISK channel"
*Cause: A proxy copy procedure was called,
but the device which is allocated to the current session has
type DISK.
*Action: Allocate a non-DISK channel and retry the operation. Note that
proxy copy requires a 3rd-party media management software product
that supports the this backup/restore feature.

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