How to fix the Oracle error NNC-00410: invalid preferred server address list?

In this post, you’ll learn more about the Oracle ErrorNNC-00410: invalid preferred server address list with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

NNC-00410: invalid preferred server address list

Reason for the Error NNC-00410: invalid preferred server address list

Cause: The names.preferred_servers parameter in sqlnet.ora is malformed.

How to fix the Error NNC-00410: invalid preferred server address list ?

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

Action: Make sure the address list is properly formatted.