After running the script result will be generated in XML in rational robot, The problem is when the result is generated I am getting message like below. Kindly help me on this

"The XML page cannot be displayed
Cannot view XML input using XSL style sheet. Please correct the error and then click the Refresh button, or try again later.
XML document must have a top level element. Error processing resource 'file:///D:/Program Files/Rational/Rational Test/Robo..."