java.io.CharConversionException: Invalid UTF-8 start byte 0xfc (at char #216193, byte #215999)
   at com.ctc.wstx.io.UTF8Reader.reportInvalidInitial(UTF8Reader.java:299)
   at com.ctc.wstx.io.UTF8Reader.read(UTF8Reader.java:185)
   at com.ctc.wstx.io.ReaderSource.readInto(ReaderSource.java:84)
   at com.ctc.wstx.io.BranchingReaderSource.readInto(BranchingReaderSource.java:57)
   at com.ctc.wstx.sr.StreamScanner.loadMore(StreamScanner.java:967)
   at com.ctc.wstx.sr.StreamScanner.loadMore(StreamScanner.java:1009)
   at com.ctc.wstx.sr.StreamScanner.getNextChar(StreamScanner.java:769)
   at com.ctc.wstx.sr.BasicStreamReader.parseNormalizedAttrValue(BasicStreamReader.java:1900)
   at com.ctc.wstx.sr.BasicStreamReader.handleNsAttrs(BasicStreamReader.java:3035)
   at com.ctc.wstx.sr.BasicStreamReader.handleStartElem(BasicStreamReader.java:2934)
   at com.ctc.wstx.sr.BasicStreamReader.nextFromTree(BasicStreamReader.java:2846)
Caused: com.ctc.wstx.exc.WstxIOException: Invalid UTF-8 start byte 0xfc (at char #216193, byte #215999)
   at com.ctc.wstx.sr.StreamScanner.throwFromIOE(StreamScanner.java:683)
   at com.ctc.wstx.sr.BasicStreamReader.next(BasicStreamReader.java:1086)
   at org.netbeans.modules.uml.ui.support.diagramsupport.TSDiagramParser.readXMLPres(TSDiagramParser.java:186)
   at org.netbeans.modules.uml.ui.support.diagramsupport.TSDiagramParser.getDiagramInfo(TSDiagramParser.java:85)
   at org.netbeans.modules.uml.ui.support.diagramsupport.ProxyDiagramImpl.getDiagramDetails(ProxyDiagramImpl.java:108)
   at org.netbeans.modules.uml.ui.support.diagramsupport.ProxyDiagramImpl.getXMIID(ProxyDiagramImpl.java:454)
   at org.netbeans.modules.uml.project.ui.NetBeansUMLProjectTreeModel.getNodeKey(NetBeansUMLProjectTreeModel.java:776)
   at org.netbeans.modules.uml.project.ui.NetBeansUMLProjectTreeModel.addNode(NetBeansUMLProjectTreeModel.java:803)
   at org.netbeans.modules.uml.project.ui.NetBeansUMLProjectTreeModel.addItem(NetBeansUMLProjectTreeModel.java:265)
   at org.netbeans.modules.uml.ui.products.ad.projecttreedefaultengine.ADProjectTreeEngine.addDiagram(ADProjectTreeEngine.java:1744)
   at org.netbeans.modules.uml.ui.products.ad.projecttreedefaultengine.ADProjectTreeEngine.addAllDiagramsInProject(ADProjectTreeEngine.java:2273)
   at org.netbeans.modules.uml.ui.products.ad.projecttreedefaultengine.ADProjectTreeEngine.handleItemExpanding(ADProjectTreeEngine.java:3406)
   at org.netbeans.modules.uml.ui.products.ad.projecttreedefaultengine.ADProjectTreeEngine.onNodeExpanding(ADProjectTreeEngine.java:3348)
   at org.netbeans.modules.uml.ui.products.ad.projecttreedefaultengine.ADProjectTreeEngine$ProjectTreeListener.onItemExpandingWithFilter(ADProjectTreeEngine.java:3782)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java:0)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
   at java.lang.reflect.Method.invoke(Method.java:597)
   at org.netbeans.modules.uml.core.eventframework.EventFunctor.invokeMethod(EventFunctor.java:240)
   at org.netbeans.modules.uml.core.eventframework.EventFunctor.execute(EventFunctor.java:126)
   at org.netbeans.modules.uml.core.eventframework.EventManager.notifyListeners(EventManager.java:182)
   at org.netbeans.modules.uml.ui.controls.projecttree.ProjectTreeEventDispatcherImpl.fireItemExpandingWithFilter(ProjectTreeEventDispatcherImpl.java:281)
   at org.netbeans.modules.uml.project.ui.NetBeansUMLProjectTreeModel.fireDiagramsExpanding(NetBeansUMLProjectTreeModel.java:162)
   at org.netbeans.modules.uml.project.ui.nodes.UMLDiagramsRootNode$DiagramsChildren.sendNodeExpandEvent(UMLDiagramsRootNode.java:290)
   at org.netbeans.modules.uml.project.ui.nodes.UMLChildren.addNotify(UMLChildren.java:99)
   at org.openide.nodes.Children.callAddNotify(Children.java:554)
   at org.openide.nodes.EntrySupport$Default.getArray(EntrySupport.java:762)
   at org.openide.nodes.EntrySupport$Default.getNodes(EntrySupport.java:214)
   at org.openide.nodes.Children.getNodes(Children.java:480)
   at org.openide.nodes.FilterNode$Children$DefaultSupport.callGetNodesCount(FilterNode.java:1665)
   at org.openide.nodes.FilterNode$Children.getNodesCount(FilterNode.java:1617)
   at org.openide.explorer.view.TreeView$6.run(TreeView.java:959)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1426)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1968)