Jenkins problem - ERROR: Failed to archive test reports

[include85]

Hi, could you help me with this error in Jenkins(v1.410)?
It happens sometime and I don't understand why!

Total time: 318 minutes 43 seconds
Recording test results
<h2>ERROR: Failed to archive test reports</h2>
hudson.util.IOException2: Failed to read C:\HUDSON\jobs\Firefox 11.0 Windows TestPC.31.30.32 and groups=staging\workspace\target\reports\junitreports\TEST-com.ndg.test.selenium.campaigns.Campaigns.edit.campaign_edit_General_Programmation_Section.xml
	at hudson.tasks.junit.TestResult.parse(TestResult.java:215)
	at hudson.tasks.junit.TestResult.parse(TestResult.java:155)
	at hudson.tasks.junit.TestResult.<init>(TestResult.java:118)
	at hudson.tasks.junit.JUnitParser$ParseResultCallable.invoke(JUnitParser.java:114)
	at hudson.tasks.junit.JUnitParser$ParseResultCallable.invoke(JUnitParser.java:87)
	at hudson.FilePath.act(FilePath.java:756)
	at hudson.FilePath.act(FilePath.java:738)
	at hudson.tasks.junit.JUnitParser.parse(JUnitParser.java:83)
	at hudson.tasks.junit.JUnitResultArchiver.parse(JUnitResultArchiver.java:123)
	at hudson.tasks.junit.JUnitResultArchiver.perform(JUnitResultArchiver.java:135)
	at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:19)
	at hudson.model.AbstractBuild$AbstractRunner.perform(AbstractBuild.java:662)
	at hudson.model.AbstractBuild$AbstractRunner.performAllBuildSteps(AbstractBuild.java:638)
	at hudson.model.AbstractBuild$AbstractRunner.performAllBuildSteps(AbstractBuild.java:616)
	at hudson.model.Build$RunnerImpl.post2(Build.java:161)
	at hudson.model.AbstractBuild$AbstractRunner.post(AbstractBuild.java:585)
	at hudson.model.Run.run(Run.java:1398)
	at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
	at hudson.model.ResourceController.execute(ResourceController.java:88)
	at hudson.model.Executor.run(Executor.java:145)
Caused by: org.dom4j.DocumentException: Invalid byte 2 of 2-byte UTF-8 sequence. Nested exception: Invalid byte 2 of 2-byte UTF-8 sequence.
	at org.dom4j.io.SAXReader.read(SAXReader.java:484)
	at org.dom4j.io.SAXReader.read(SAXReader.java:264)
	at hudson.tasks.junit.SuiteResult.parse(SuiteResult.java:101)
	at hudson.tasks.junit.TestResult.parse(TestResult.java:200)
	... 19 more
Caused by: com.sun.org.apache.xerces.internal.impl.io.MalformedByteSequenceException: Invalid byte 2 of 2-byte UTF-8 sequence.
	at com.sun.org.apache.xerces.internal.impl.io.UTF8Reader.invalidByte(Unknown Source)
	at com.sun.org.apache.xerces.internal.impl.io.UTF8Reader.read(Unknown Source)
	at com.sun.org.apache.xerces.internal.impl.XMLEntityScanner.load(Unknown Source)
	at com.sun.org.apache.xerces.internal.impl.XMLEntityScanner.scanLiteral(Unknown Source)
	at com.sun.org.apache.xerces.internal.impl.XMLScanner.scanAttributeValue(Unknown Source)
	at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanAttribute(Unknown Source)
	at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown Source)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(Unknown Source)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source)
	at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(Unknown Source)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
	at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
	at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
	at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source)
	at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source)
	at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
	at org.dom4j.io.SAXReader.read(SAXReader.java:465)
	... 22 more
Archiving artifacts
Finished: FAILURE

Thanks.