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

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

Oracle Error Description

ORA-12600: TNS: string open failed

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

The creation of a string in ORACLE NLS format failed.

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

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

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