How to fix the Oracle error ORA-21526: initialization failed?

In this post, you’ll learn more about the Oracle ErrorORA-21526: initialization failed with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-21526: initialization failed

Reason for the Error ORA-21526: initialization failed

The initialization sequence failed. This can happen, for example, if an environment variable such as NLS_DATE_FORMAT is set to an invalid value.

How to fix the Error ORA-21526: initialization failed ?

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

Check that all NLS environment variables are well-formed.