Error(1,1): file:< Application path>/Model/src/model/mdssys/mdx/XXXXXX.xml.rdf: XML-20108: (Fatal Error) Start of root element expected

Solution:

JDeveloper is expecting some xml content in the file. So put some blank xml tags in that file like below

and save the file.

 

<?xml version="1.0" encoding="UTF-8" ?>

<test>

</test>