How to fix the Oracle error TNS-02403: Bad alias string or alias not present in tnsnames.ora?

In this post, you’ll learn more about the Oracle ErrorTNS-02403: Bad alias string or alias not present in tnsnames.ora with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

TNS-02403: Bad alias string or alias not present in tnsnames.ora

Reason for the Error TNS-02403: Bad alias string or alias not present in tnsnames.ora

Cause: An alias was expected in tnsnames.ora but was not found or was not correctly formed.

How to fix the Error TNS-02403: Bad alias string or alias not present in tnsnames.ora ?

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

Action: Check the tnsnames.ora for the alias and make sure it is correctly formed.