Oracle® Database 11g / 12c / 18c error codes ORA-12206: TNS:received a TNS error during navigation

ORA-12206: TNS:received a TNS error during navigation

Oracle Error Code: ORA-12206

Cause: Internal navigation error because of an unexpected TNS error.

Action: Look at the log file to find the TNS error. If necessary, turn on tracing and repeat the operation.