How to fix the Oracle error TNS-12217: TNS:could not contact PREFERRED_CMANAGERS in TNSNAV.ORA?

In this post, you’ll learn more about the Oracle ErrorTNS-12217: TNS:could not contact PREFERRED_CMANAGERS in TNSNAV.ORA with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

TNS-12217: TNS:could not contact PREFERRED_CMANAGERS in TNSNAV.ORA

Reason for the Error TNS-12217: TNS:could not contact PREFERRED_CMANAGERS in TNSNAV.ORA

Cause: There is a syntax error in the PREFERRED_CMANAGERS entry, or addresses specified are wrong, or the intended Connection Managers are unavailable.

How to fix the Error TNS-12217: TNS:could not contact PREFERRED_CMANAGERS in TNSNAV.ORA ?

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

Action: Check the PREFERRED_CMANAGERS entries in the client’s TNSNAV.ORA file and correct them or talk with your network administrator to determine if the specified Connection Managers are available. Verify that the Interchanges are active by using the INTCTL STATUS command.