How to fix the Oracle error PGU-20002: unable to login to Oracle?

In this post, you’ll learn more about the Oracle ErrorPGU-20002: unable to login to Oracle with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

PGU-20002: unable to login to Oracle

Reason for the Error PGU-20002: unable to login to Oracle

Cause: An error occurred attempting to logon to the Oracle server. Syntax checking only continues with the next statement.

How to fix the Error PGU-20002: unable to login to Oracle ?

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

Action: Ensure that the Oracle server containing the PG DD is operational.