How to fix the Oracle error NID-00123: Magic number for datafile “string” is incorrect?

In this post, you’ll learn more about the Oracle ErrorNID-00123: Magic number for datafile “string” is incorrect with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

NID-00123: Magic number for datafile “string” is incorrect

Reason for the Error NID-00123: Magic number for datafile “string” is incorrect

Block 0 header has an incorrect magic number for the specified datafile.

How to fix the Error NID-00123: Magic number for datafile “string” is incorrect ?

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

Verify that the datafile is correct and retry the operation.