Diffx: com.topologi.diffx.xml.IllegalCloseElementException: Attempting to close an element with no more element to close

[plutext]

com.topologi.diffx.xml.IllegalCloseElementException: Attempting to close an element with no more element to close.
at com.topologi.diffx.xml.XMLWriterNSImpl.closeElement(XMLWriterNSImpl.java:216)
at com.topologi.diffx.event.impl.CloseElementEventNSImpl.toXML(CloseElementEventNSImpl.java:129)
at com.topologi.diffx.format.SmartXMLFormatter.delete(SmartXMLFormatter.java:194)
at com.topologi.diffx.algorithm.DiffXFitopsy.process(DiffXFitopsy.java:290)
at com.topologi.diffx.Docx4jDriver.mainDiff(Docx4jDriver.java:179)
at com.topologi.diffx.Docx4jDriver.diff(Docx4jDriver.java:411)
at org.docx4j.diff.Differencer.diffWorker(Differencer.java:324)
at org.docx4j.diff.Differencer.diff(Differencer.java:302)
at org.docx4j.samples.CompareDocuments.main(CompareDocuments.java:109)

using the documents at http://www.docx4java.org/forums/docx-java-f6/not-able-to-compare-two-documents-if-it-contains-any-image-t2248.html