My source schema is having a default namespace and all the nodes belong to that namespace. eg: xmlns=\”http://mynamespace\”. I mapped this source to a destination schema and while validating my instance message, I am getting the error \”Output validation error: The root element is missing \”. This will be solved if I am modifying my instance message as xmlns:ns0=\”http://mynamespace\” and prefix all the nodes with ns0. Can anyone suggest a solution for this other than modifying the file?