How to fix the Oracle error PGA-21400: ORACLE_HOME environment variable not set?

In this post, you’ll learn more about the Oracle ErrorPGA-21400: ORACLE_HOME environment variable not set with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

PGA-21400: ORACLE_HOME environment variable not set

Reason for the Error PGA-21400: ORACLE_HOME environment variable not set

Cause: The ORACLE_HOME environment variable was not set before the RRM was started.

How to fix the Error PGA-21400: ORACLE_HOME environment variable not set ?

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.