How to fix the Oracle error TNS-00018: INTCTL: TNS_ADMIN not defined?

In this post, you’ll learn more about the Oracle ErrorTNS-00018: INTCTL: TNS_ADMIN not defined with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

TNS-00018: INTCTL: TNS_ADMIN not defined

Reason for the Error TNS-00018: INTCTL: TNS_ADMIN not defined

Cause: The TNS_ADMIN pointer is improperly set.

How to fix the Error TNS-00018: INTCTL: TNS_ADMIN not defined ?

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

Action: No action necessary; TNS_ADMIN need only be set if you want to use a different network environment.