Oracle : Ошибка ORA-12656

"Cryptographic checksum mismatch"
*Cause: The cryptographic checksum received with a packet of
incoming data didn't match the checksum computed by the
receiving end. This indicates that the packet was
tampered with or otherwise corrupted in transit.
*Action: Look for sources of data corruption, perhaps including
deliberate tampering.

Попробовать перевести

Поискать эту ошибку на форуме