How to fix the Oracle error TNS-12216: TNS:poorly formed PREFERRED_CMANAGERS addresses in TNSNAV.ORA?

In this post, you’ll learn more about the Oracle ErrorTNS-12216: TNS:poorly formed PREFERRED_CMANAGERS addresses in TNSNAV.ORA with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

TNS-12216: TNS:poorly formed PREFERRED_CMANAGERS addresses in TNSNAV.ORA

Reason for the Error TNS-12216: TNS:poorly formed PREFERRED_CMANAGERS addresses in TNSNAV.ORA

Cause: Address binding for the PREFERRED_CMANAGERS entry in the client’s TNSNAV.ORA file is improperly entered.

How to fix the Error TNS-12216: TNS:poorly formed PREFERRED_CMANAGERS addresses in TNSNAV.ORA ?

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

Action: Define the ADDRESS as part of the PREFERRED_CMANAGERS binding.