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

In this post, you’ll learn more about the Oracle ErrorORA-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

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

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

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

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

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

Define the ADDRESS as part of the PREFERRED_CMANAGERS binding.