java.lang.NullPointerException: The folder parameter cannot be null
   at org.openide.util.Parameters.notNull(Parameters.java:89)
   at org.openide.filesystems.FileUtil.isParentOf(FileUtil.java:1600)
   at org.netbeans.spi.java.project.support.ui.TreeRootNode$PathFinder.findPathReduced(TreeRootNode.java:235)
   at org.netbeans.spi.java.project.support.ui.TreeRootNode$PathFinder.findPathReduced(TreeRootNode.java:237)
   at org.netbeans.spi.java.project.support.ui.TreeRootNode$PathFinder.findPath(TreeRootNode.java:195)
   at org.netbeans.spi.java.project.support.ui.PackageView.findPath(PackageView.java:130)
   at org.netbeans.modules.java.j2seproject.ui.J2SELogicalViewProvider.findPath(J2SELogicalViewProvider.java:238)
   at org.netbeans.modules.analysis.ui.Nodes.locateChild(Nodes.java:390)
   at org.netbeans.modules.analysis.ui.Nodes.resolveFileNodes(Nodes.java:368)
   at org.netbeans.modules.analysis.ui.Nodes.constructSemiLogicalView(Nodes.java:355)
   at org.netbeans.modules.analysis.ui.Nodes.constructSemiLogicalViewNodes(Nodes.java:310)
   at org.netbeans.modules.analysis.ui.Nodes.constructSemiLogicalView(Nodes.java:114)
   at org.netbeans.modules.analysis.ui.Nodes.access$000(Nodes.java:92)
   at org.netbeans.modules.analysis.ui.Nodes$1.createKeys(Nodes.java:99)
   at org.openide.nodes.AsynchChildren.run(AsynchChildren.java:206)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1452)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2032)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.NullPointerException: The folder parameter cannot be null
   at org.openide.util.RequestProcessor$Task.schedule(RequestProcessor.java:1493)
   at org.openide.nodes.AsynchChildren.addNotify(AsynchChildren.java:89)
   at org.openide.nodes.Children.callAddNotify(Children.java:575)
   at org.openide.nodes.EntrySupportDefault.getArray(EntrySupportDefault.java:632)
   at org.openide.nodes.EntrySupportDefault.getNodes(EntrySupportDefault.java:114)
   at org.openide.nodes.EntrySupportDefault.getNodes(EntrySupportDefault.java:165)
   at org.openide.nodes.EntrySupportDefault.getNodesCount(EntrySupportDefault.java:169)
   at org.openide.nodes.Children.getNodesCount(Children.java:509)
   at org.openide.explorer.view.VisualizerNode.getChildren(VisualizerNode.java:258)
   at org.openide.explorer.view.VisualizerNode.getChildren(VisualizerNode.java:248)
   at org.openide.explorer.view.VisualizerNode.getChildCount(VisualizerNode.java:325)
   at javax.swing.tree.DefaultTreeModel.getChildCount(DefaultTreeModel.java:186)
   at javax.swing.tree.FixedHeightLayoutCache$FHTreeStateNode.expand(FixedHeightLayoutCache.java:1152)
   at javax.swing.tree.FixedHeightLayoutCache.rebuild(FixedHeightLayoutCache.java:617)
   at javax.swing.tree.FixedHeightLayoutCache.treeStructureChanged(FixedHeightLayoutCache.java:489)
   at javax.swing.plaf.basic.BasicTreeUI$Handler.treeStructureChanged(BasicTreeUI.java:3891)
   at javax.swing.tree.DefaultTreeModel.fireTreeStructureChanged(DefaultTreeModel.java:580)
   at javax.swing.tree.DefaultTreeModel.nodeStructureChanged(DefaultTreeModel.java:365)
   at javax.swing.tree.DefaultTreeModel.setRoot(DefaultTreeModel.java:135)
   at org.openide.explorer.view.NodeTreeModel$1.run(NodeTreeModel.java:122)
   at org.openide.util.Mutex.doEvent(Mutex.java:1343)
   at org.openide.util.Mutex.readAccess(Mutex.java:350)
   at org.openide.explorer.view.NodeTreeModel.setNode(NodeTreeModel.java:107)
   at org.openide.explorer.view.TreeView$4.run(TreeView.java:872)
   at org.openide.util.Mutex.doEvent(Mutex.java:1343)
   at org.openide.util.Mutex.readAccess(Mutex.java:350)
   at org.openide.explorer.view.TreeView.synchronizeRootContext(TreeView.java:862)
   at org.openide.explorer.view.TreeView$TreePropertyListener$1.run(TreeView.java:1279)
   at org.openide.util.Mutex.readAccess(Mutex.java:367)
   at org.openide.util.Mutex$1R.run(Mutex.java:1309)
   at org.openide.util.Mutex.doWrapperAccess(Mutex.java:1326)
   at org.openide.util.Mutex.readAccess(Mutex.java:356)
   at org.openide.explorer.view.TreeView$TreePropertyListener.propertyChange(TreeView.java:1276)
   at org.openide.util.WeakListenerImpl$PropertyChange.propertyChange(WeakListenerImpl.java:196)
   at java.beans.PropertyChangeSupport.fire(PropertyChangeSupport.java:335)
   at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:327)
   at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:263)
   at org.openide.explorer.ExplorerManager$2.run(ExplorerManager.java:876)
   at org.openide.util.Mutex.doEvent(Mutex.java:1343)
   at org.openide.util.Mutex.readAccess(Mutex.java:350)
   at org.openide.explorer.ExplorerManager.fireInAWT(ExplorerManager.java:873)
   at org.openide.explorer.ExplorerManager$1SetRootContext.run(ExplorerManager.java:498)
   at org.openide.util.Mutex.readAccess(Mutex.java:367)
   at org.openide.util.Mutex$1R.run(Mutex.java:1309)
   at org.openide.nodes.Children$ProjectManagerDeadlockDetector.execute(Children.java:1921)
   at org.openide.util.Mutex.doWrapperAccess(Mutex.java:1328)
   at org.openide.util.Mutex.readAccess(Mutex.java:356)
   at org.openide.explorer.ExplorerManager.setRootContext(ExplorerManager.java:510)
   at org.netbeans.modules.analysis.ui.AnalysisResultTopComponent.setData(AnalysisResultTopComponent.java:366)
   at org.netbeans.modules.analysis.RunAnalysis$1$1$1.run(RunAnalysis.java:180)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:705)
   at java.awt.EventQueue.access$000(EventQueue.java:101)
   at java.awt.EventQueue$3.run(EventQueue.java:666)
   at java.awt.EventQueue$3.run(EventQueue.java:664)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:675)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:158)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:211)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:128)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:121)
   at java.awt.WaitDispatchSupport$2.run(WaitDispatchSupport.java:182)
   at java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:221)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.awt.WaitDispatchSupport.enter(WaitDispatchSupport.java:219)
   at java.awt.Dialog.show(Dialog.java:1072)
   at org.netbeans.core.windows.services.NbPresenter.superShow(NbPresenter.java:1074)
   at org.netbeans.core.windows.services.NbPresenter.doShow(NbPresenter.java:1109)
   at org.netbeans.core.windows.services.NbPresenter.run(NbPresenter.java:1096)
   at org.netbeans.core.windows.services.NbPresenter.run(NbPresenter.java:126)
   at org.openide.util.Mutex.doEventAccess(Mutex.java:1363)
   at org.openide.util.Mutex.readAccess(Mutex.java:273)
   at org.netbeans.core.windows.services.NbPresenter.show(NbPresenter.java:1081)
   at java.awt.Component.show(Component.java:1650)
   at java.awt.Component.setVisible(Component.java:1602)
   at java.awt.Window.setVisible(Window.java:1013)
   at java.awt.Dialog.setVisible(Dialog.java:1003)
   at org.netbeans.modules.analysis.RunAnalysis.showDialogAndRunAnalysis(RunAnalysis.java:231)
   at org.netbeans.modules.analysis.RunAnalysis.showDialogAndRunAnalysis(RunAnalysis.java:109)
   at org.netbeans.modules.analysis.RunAnalysisAction.actionPerformed(RunAnalysisAction.java:62)
   at org.openide.awt.AlwaysEnabledAction$1.run(AlwaysEnabledAction.java:197)
   at org.openide.util.actions.ActionInvoker$1.run(ActionInvoker.java:95)
   at org.openide.util.actions.ActionInvoker.doPerformAction(ActionInvoker.java:116)
   at org.openide.util.actions.ActionInvoker.invokeAction(ActionInvoker.java:99)
   at org.openide.awt.AlwaysEnabledAction.actionPerformed(AlwaysEnabledAction.java:200)
   at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018)
   at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341)
   at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
   at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
   at javax.swing.AbstractButton.doClick(AbstractButton.java:376)
   at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:833)
   at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:877)
   at java.awt.Component.processMouseEvent(Component.java:6504)
   at javax.swing.JComponent.processMouseEvent(JComponent.java:3321)
   at java.awt.Component.processEvent(Component.java:6269)
   at java.awt.Container.processEvent(Container.java:2229)
   at java.awt.Component.dispatchEventImpl(Component.java:4860)
   at java.awt.Container.dispatchEventImpl(Container.java:2287)
   at java.awt.Component.dispatchEvent(Component.java:4686)
   at java.awt.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4832)
   at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:4492)
   at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.java:4422)
   at java.awt.Container.dispatchEventImpl(Container.java:2273)
   at java.awt.Window.dispatchEventImpl(Window.java:2713)
   at java.awt.Component.dispatchEvent(Component.java:4686)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:707)
   at java.awt.EventQueue.access$000(EventQueue.java:101)
   at java.awt.EventQueue$3.run(EventQueue.java:666)
   at java.awt.EventQueue$3.run(EventQueue.java:664)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
   at java.awt.EventQueue$4.run(EventQueue.java:680)
   at java.awt.EventQueue$4.run(EventQueue.java:678)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:677)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:158)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:211)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:128)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:117)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:113)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:105)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:90)