How to fix the Oracle error TNS-12211: TNS:needs PREFERRED_CMANAGERS entry in TNSNAV.ORA?

In this post, you’ll learn more about the Oracle ErrorTNS-12211: TNS:needs PREFERRED_CMANAGERS entry in TNSNAV.ORA with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

TNS-12211: TNS:needs PREFERRED_CMANAGERS entry in TNSNAV.ORA

Reason for the Error TNS-12211: TNS:needs PREFERRED_CMANAGERS entry in TNSNAV.ORA

Cause: TNSNAV.ORA does not have a PREFERRED_CMANAGERS defined.

How to fix the Error TNS-12211: TNS:needs PREFERRED_CMANAGERS entry in TNSNAV.ORA ?

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

Action: Add a PREFERRED_CMANAGERS entry to the TNSNAV.ORA file.