How to fix the Oracle error LPX-00251: conditional sections are valid only in external DTDs?

In this post, you’ll learn more about the Oracle ErrorLPX-00251: conditional sections are valid only in external DTDs with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

LPX-00251: conditional sections are valid only in external DTDs

Reason for the Error LPX-00251: conditional sections are valid only in external DTDs

Cause: A condition section is not permitted in internal DTDs.

How to fix the Error LPX-00251: conditional sections are valid only in external DTDs ?

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

Action: Remove the condition section.