Qxtend Error - QdocExceptionex020


Progress Version : 11.7
Qad Version: qad ee2013

I have limited knowledge in Qxtend side. While testing few custom Qdocs through SOAP UI we are getting the below exception QdocException020 in qdoc response file.

And also the error message starts with org.xml.sax.saxexception java.lang.nullpointerException at org.apache.xerces.Framework.XMLparse.parse(XML Parser.java.1111) and continues.

I just need an idea how to start an investigation.

Thanks in advance.please advice..