How to fix the Oracle error TNS-12600: TNS: string open failed?

In this post, you’ll learn more about the Oracle ErrorTNS-12600: TNS: string open failed with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

TNS-12600: TNS: string open failed

Reason for the Error TNS-12600: TNS: string open failed

Cause: The creation of a string in ORACLE NLS format failed.

How to fix the Error TNS-12600: TNS: string open failed ?

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

Action: This is an internal error, enable tracing and attempt to repeat the error. If it occurs again, contact Oracle Customer Support.