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.