How to fix the Oracle error ORA-28403: file string cannot be modified because it is an online data file?

In this post, you’ll learn more about the Oracle ErrorORA-28403: file string cannot be modified because it is an online data file with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-28403: file string cannot be modified because it is an online data file

Reason for the Error ORA-28403: file string cannot be modified because it is an online data file

An attempt was made to modify an online data file when the file was not expected to be part of the database.

How to fix the Error ORA-28403: file string cannot be modified because it is an online data file ?

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

Check the status of the file and its tablespace and make sure it is offline or is a copy of a data file