Oracle® Database 11g / 12c / 18c error codes ORA-12198: TNS:could not find path to destination

ORA-12198: TNS:could not find path to destination

Oracle Error Code: ORA-12198

Cause: Could not navigate a path through Interchanges to the destination. This error occurs if an invalid community is in the address string, or the address includes a protocol that is not available or the TNSNAV.ORA file does not have a correct CMANAGER address specified or the Interchange is down.

Action: Assure that Interchanges necessary to get to the desired destination are up and have available capacity for an additional connection. Also check that the correct community and protocol have been specified in the CMANAGER address used.