Oracle : Ошибка ORA-12560

"TNS:protocol adapter error"
*Cause: A generic protocol adapter error occurred.
*Action: Check addresses used for proper protocol specification. Before
reporting this error, look at the error stack and check for lower level
transport errors. For further details, turn on tracing and reexecute the
operation. Turn off tracing when the operation is complete.

Попробовать перевести

Поискать эту ошибку на форуме