output format of my result.xml looks like below
<TestLog><TestSuite name="SIPParserUT"><TestSuite name=" ....../ and so on

I am facing following error while publishing output

[xUnit] [INFO] - Processing BoostTest-1.x (default)
[xUnit] [INFO] - [BoostTest-1.x (default)] - 1 test report file(s) were found with the pattern '*.xml' relative to '/home/jenkins/jenkins/perforce/CS-GCC-SIP' for the testing framework 'BoostTest-1.x (default)'.
[xUnit] [ERROR] - The result file '/home/jenkins/jenkins/perforce/CS-GCC-SIP/results.xml' for the metric 'BoostTest' is not valid. The result file has been skipped.
[xUnit] [INFO] - Failing BUILD because 'set build failed if errors' option is activated.
[xUnit] [INFO] - There are errors when processing test results.
[xUnit] [INFO] - Skipping tests recording.
[xUnit] [INFO] - Stop build.