java.io.UTFDataFormatException: Invalid byte 1 of 1-byte UTF-8 sequence.
        at com.sun.xml.stream.xerces.impl.io.UTF8Reader.invalidByte(UTF8Reader.java:755)
        at com.sun.xml.stream.xerces.impl.io.UTF8Reader.read(UTF8Reader.java:624)
        at com.sun.xml.stream.XMLEntityReaderImpl.load(XMLEntityReaderImpl.java:1739)
        at com.sun.xml.stream.XMLEntityReaderImpl.scanLiteral(XMLEntityReaderImpl.java:1049)
        at com.sun.xml.stream.XMLScanner.scanAttributeValue(XMLScanner.java:810)
        at com.sun.xml.stream.XMLNSDocumentScannerImpl.scanAttribute(XMLNSDocumentScannerImpl.java:511)
        at com.sun.xml.stream.XMLNSDocumentScannerImpl.scanStartElement(XMLNSDocumentScannerImpl.java:310)
        at com.sun.xml.stream.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2652)
        at com.sun.xml.stream.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:362)
Caused: com.sun.xml.stream.XMLStreamException2: ParseError at [row,col]:[5595,49]
Message: Invalid byte 1 of 1-byte UTF-8 sequence.
        at com.sun.xml.stream.XMLReaderImpl.next(XMLReaderImpl.java:571)
        at org.netbeans.modules.uml.ui.support.diagramsupport.TSDiagramParser.readXMLPres(TSDiagramParser.java:183)
        at org.netbeans.modules.uml.ui.support.diagramsupport.TSDiagramParser.getDiagramInfo(TSDiagramParser.java:82)
        at org.netbeans.modules.uml.ui.support.diagramsupport.ProxyDiagramImpl.getDiagramDetails(ProxyDiagramImpl.java:105)
        at org.netbeans.modules.uml.ui.support.diagramsupport.ProxyDiagramImpl.getNamespaceXMIID(ProxyDiagramImpl.java:437)
        at org.netbeans.modules.uml.ui.support.diagramsupport.ProxyDiagramManager.getDiagramsInNamespace(ProxyDiagramManager.java:661)
        at org.netbeans.modules.uml.ui.support.diagramsupport.ProxyDiagramManager.getDiagramsInNamespace(ProxyDiagramManager.java:482)
        at org.netbeans.modules.uml.ui.support.diagramsupport.ProxyDiagramManager.getDiagramsInNamespace(ProxyDiagramManager.java:506)
        at org.netbeans.modules.uml.ui.support.projecttreesupport.ProjectTreeBuilderImpl.retrieveDiagramsForElement(ProjectTreeBuilderImpl.java:1557)
        at org.netbeans.modules.uml.ui.support.projecttreesupport.ProjectTreeBuilderImpl.retrieveChildItemsForElement(ProjectTreeBuilderImpl.java:188)
        at org.netbeans.modules.uml.ui.support.projecttreesupport.ProjectTreeBuilderImpl.retrieveChildItems(ProjectTreeBuilderImpl.java:134)
        at org.netbeans.modules.uml.ui.support.projecttreesupport.ProjectTreeBuilderImpl.retrieveChildItemsSorted(ProjectTreeBuilderImpl.java:400)
        at org.netbeans.modules.uml.ui.products.ad.projecttreedefaultengine.ADProjectTreeEngine.retrieveChildItems(ADProjectTreeEngine.java:2107)
        at org.netbeans.modules.uml.ui.products.ad.projecttreedefaultengine.ADProjectTreeEngine.addOwnedElements(ADProjectTreeEngine.java:1592)
        at org.netbeans.modules.uml.ui.products.ad.projecttreedefaultengine.ADProjectTreeEngine.addOwnedElements(ADProjectTreeEngine.java:1560)
        at org.netbeans.modules.uml.ui.products.ad.projecttreedefaultengine.ADProjectTreeEngine.handleItemExpanding(ADProjectTreeEngine.java:3407)
        at org.netbeans.modules.uml.ui.products.ad.projecttreedefaultengine.ADProjectTreeEngine.handleItemExpanding(ADProjectTreeEngine.java:3360)
        at org.netbeans.modules.uml.ui.products.ad.projecttreedefaultengine.ADProjectTreeEngine.onNodeExpanding(ADProjectTreeEngine.java:3341)
        at org.netbeans.modules.uml.ui.products.ad.projecttreedefaultengine.ADProjectTreeEngine$ProjectTreeListener.onItemExpanding(ADProjectTreeEngine.java:3771)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java:0)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.netbeans.modules.uml.core.eventframework.EventFunctor.invokeMethod(EventFunctor.java:237)
        at org.netbeans.modules.uml.core.eventframework.EventFunctor.execute(EventFunctor.java:123)
        at org.netbeans.modules.uml.core.eventframework.EventManager.notifyListeners(EventManager.java:179)
        at org.netbeans.modules.uml.ui.controls.projecttree.ProjectTreeEventDispatcherImpl.fireItemExpanding(ProjectTreeEventDispatcherImpl.java:250)
        at org.netbeans.modules.uml.project.ui.NetBeansUMLProjectTreeModel.fireItemExpanding(NetBeansUMLProjectTreeModel.java:189)
        at org.netbeans.modules.uml.project.ui.nodes.UMLChildren.sendNodeExpandEvent(UMLChildren.java:154)
        at org.netbeans.modules.uml.project.ui.nodes.UMLChildren.addNotify(UMLChildren.java:96)
        at org.openide.nodes.Children.callAddNotify(Children.java:547)
        at org.openide.nodes.EntrySupport$Default.getArray(EntrySupport.java:732)
        at org.openide.nodes.EntrySupport$Default.getNodes(EntrySupport.java:207)
        at org.openide.nodes.Children.getNodes(Children.java:473)
        at org.openide.nodes.FilterNode$Children$DefaultSupport.callGetNodesCount(FilterNode.java:1650)
        at org.openide.nodes.FilterNode$Children.getNodesCount(FilterNode.java:1602)
        at org.openide.explorer.view.TreeView$6.run(TreeView.java:912)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:577)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1030)