How to fix the Oracle error PGA-21401: ORACLE_HOME environment variable set to null string?

In this post, you’ll learn more about the Oracle ErrorPGA-21401: ORACLE_HOME environment variable set to null string with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

PGA-21401: ORACLE_HOME environment variable set to null string

Reason for the Error PGA-21401: ORACLE_HOME environment variable set to null string

Cause: The ORACLE_HOME environment variable was set to a null value.

How to fix the Error PGA-21401: ORACLE_HOME environment variable set to null string ?

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

Action: The ORACLE_HOME environment variable must be set to the gateway’s ORACLE_HOME directory before the RRM is started.