How to fix the Oracle error TNS-04021: The SET command is unsuccessful for parameter string.?

In this post, you’ll learn more about the Oracle ErrorTNS-04021: The SET command is unsuccessful for parameter string. with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

TNS-04021: The SET command is unsuccessful for parameter string.

Reason for the Error TNS-04021: The SET command is unsuccessful for parameter string.

Cause: The value set for the parameter was out of range.

How to fix the Error TNS-04021: The SET command is unsuccessful for parameter string. ?

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

Action: See Oracle Net Services documentation for value ranges for the parameters.