How to fix the Oracle error TNS-12218: TNS:unacceptable network configuration data?

In this post, you’ll learn more about the Oracle ErrorTNS-12218: TNS:unacceptable network configuration data with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

TNS-12218: TNS:unacceptable network configuration data

Reason for the Error TNS-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.

How to fix the Error TNS-12218: TNS:unacceptable network configuration data ?

You can fix this error in Oracle by following the below steps

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.