BIP 11g: The following tags were not closed: DATA_DS. Error processing resource

Hi Experts,

Since past one week,  when I try to generate the XML from a data model, I am getting the below error:

When I check the log, the below message is displayed :(I have removed the project related info)

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

- <debugLog>

- <msg time="2012-05-28T09:08:49.402-04:00" comp_id="bi_server1" type="NOTIFICATION" level="1" host_id="-" host_addr="-" module="oracle.xdo" tid="599" user="<anonymous>" ecid="004kHXfFCzg2vHa_pL9DiY0005UF005TRm" rid="0:1">

  <attr name="APP" value="bipublisher#11.1.1.3.0" />

  <attr name="URI" value="/xmlpserver/Reports/Subject%20Area%20Contents/ABC.xdm" />

  <txt>ReportModelContextImpl- Invoking dataengine dataprocessor..</txt>

  </msg>

- <msg