Oracle : Ошибка ORA-12218

"TNS:unacceptable network configuration data"
*Cause: Poorly formed network configuration data. For example, a
PREFERRED_CMANAGERS entry may have an incorrect CMANAGER_NAME in the
client's TNSNAV.ORA file. Or an Interchange downtime parameter
(TIMEOUT_INTERVAL) on the Navigator may be set to zero in INTCHG.ORA.
*Action: Check the entries in TNSNAV.ORA and the Interchange
configuration files and correct them. If necessary, talk with your
network administrator to determine if the specified Interchanges
(Connection Managers) are available and properly configured.
Use the Oracle Network Manager to generate the configuration files
if necessary.

Попробовать перевести

Поискать эту ошибку на форуме