How to fix the Oracle error ORA-32153: Environment not specified?

In this post, you’ll learn more about the Oracle ErrorORA-32153: Environment not specified with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-32153: Environment not specified

Reason for the Error ORA-32153: Environment not specified

The number on which the operation was attempted was null and no environment was specified.

How to fix the Error ORA-32153: Environment not specified ?

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

Specify non-null environment or perform the operation on a non null instance.