How to fix the Oracle error ORA-01150: cannot prevent writes – file string has online backup set?

In this post, you’ll learn more about the Oracle ErrorORA-01150: cannot prevent writes – file string has online backup set with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-01150: cannot prevent writes – file string has online backup set

Reason for the Error ORA-01150: cannot prevent writes – file string has online backup set

An attempt to make a tablespace read only or offline normal found that an online backup is still in progress. It will be necessary to write the file header to end the backup, but that would not be allowed if this command succeeded.

How to fix the Error ORA-01150: cannot prevent writes – file string has online backup set ?

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

End the backup of the offending tablespace and retry this command.