Error "org.xml.sax.SAXParseException; Premature end of file" when launching WinDU command in Windchill PDMLink

• Error "org.xml.sax.SAXParseException; Premature end of file" when launching WinDU command 
• Upon launching the Windu command, an error is encountered
• The error is displayed during the execution of the Windu command

ERROR [main] com.ptc.windchill.windu.Windu - An unexpected error occurred
wt.util.WTRuntimeException: wt.util.WTException: Failed to validate XML file: 
<Windchill-Home>\WinDU\UpgradePropertyViewer.xml
Nested exception is: org.xml.sax.SAXParseException; Premature end of file.
	at com.ptc.windchill.upgrade.updates.IncrementalUpdate.getDocumentFrom(IncrementalUpdate.java:1282) ~[wnc.jar:?]
	at com.ptc.windchill.upgrade.updates.IncrementalUpdate.<init>(IncrementalUpdate.java:238) ~[wnc.jar:?]
	at com.ptc.windchill.winruwinducommon.WindruIU.<init>(WindruIU.java:14) ~[wnc.jar:?]
	at com.ptc.windchill.upgrade.updates.FileSystemBasedUpdateStore.loadWindru(FileSystemBasedUpdateStore.java:191) ~[wnc.jar:?]
	at com.ptc.windchill.windu.Windu.getWinduList(Windu.java:102) [wnc.jar:?]
	at com.ptc.windchill.windu.Windu.main(Windu.java:75) [wnc.jar:?]
Caused by: wt.util.WTException: Failed to validate XML file: E:\PTC\Windchill_12.0\Windchill\WinDU\UpgradePropertyViewer.xml
	at com.ptc.windchill.upgrade.util.UpgradeXMLReader.validateXML(UpgradeXMLReader.java:207) ~[wnc.jar:?]
	at com.ptc.windchill.upgrade.util.UpgradeXMLReader.validateXML(UpgradeXMLReader.java:164) ~[wnc.jar:?]
	at com.ptc.windchill.upgrade.updates.IncrementalUpdate.getDocumentFrom(IncrementalUpdate.java:1277) ~[wnc.jar:?]
	... 5 more
Caused by: org.xml.sax.SAXParseException: Premature end of file.
	at org.apache.xerces.util.ErrorHandlerWrapper.createSAXParseException(Unknown Source) ~[ie3rdpartylibs.jar:?]
	at org.apache.xerces.util.ErrorHandlerWrapper.fatalError(Unknown Source) ~[ie3rdpartylibs.jar:?]
	at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source) ~[ie3rdpartylibs.jar:?]
	at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source) ~[ie3rdpartylibs.jar:?]
	at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source) ~[ie3rdpartylibs.jar:?]
	at org.apache.xerces.impl.XMLVersionDetector.determineDocVersion(Unknown Source) ~[ie3rdpartylibs.jar:?]
	at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source) ~[ie3rdpartylibs.jar:?]
	at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source) ~[ie3rdpartylibs.jar:?]
	at org.apache.xerces.jaxp.validation.StreamValidatorHelper.validate(Unknown Source) ~[ie3rdpartylibs.jar:?]
	at org.apache.xerces.jaxp.validation.ValidatorImpl.validate(Unknown Source) ~[ie3rdpartylibs.jar:?]
	at javax.xml.validation.Validator.validate(Validator.java:124) ~[?:?]
	at com.ptc.windchill.upgrade.util.UpgradeXMLReader.validateXML(UpgradeXMLReader.java:205) ~[wnc.jar:?]
	at com.ptc.windchill.upgrade.util.UpgradeXMLReader.validateXML(UpgradeXMLReader.java:164) ~[wnc.jar:?]
	at com.ptc.windchill.upgrade.updates.IncrementalUpdate.getDocumentFrom(IncrementalUpdate.java:1277) ~[wnc.jar:?]
	... 5 more