How to fix the Oracle error ORA-01251: Unknown File Header Version read for file number string?

In this post, you’ll learn more about the Oracle ErrorORA-01251: Unknown File Header Version read for file number string with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-01251: Unknown File Header Version read for file number string

Reason for the Error ORA-01251: Unknown File Header Version read for file number string

Read of the file header returned a record but its version cannot be identified. Either the header has been corrupted, or the file is not a valid database file.

How to fix the Error ORA-01251: Unknown File Header Version read for file number string ?

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

Have the operating system make the correct file available to the database, or recover the file.