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Error stack trace: -------------------- SEVERE [org.openide.util.RequestProcessor]: Error in RequestProcessor org.openide.explorer.propertysheet.PropertySheet$2 java.lang.NullPointerException at project.org.jcae.netbeans.of.nodes.RegionNode.createSheet(RegionNode.java:60) at org.openide.nodes.AbstractNode.getSheet(AbstractNode.java:441) at org.openide.nodes.AbstractNode.getPropertySets(AbstractNode.java:457) at org.openide.nodes.FilterNode.getPropertySets(FilterNode.java:634) at org.openide.explorer.propertysheet.PropertySheet$2.run(PropertySheet.java:613) at org.openide.util.RequestProcessor$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 at org.openide.util.RequestProcessor$Task.schedule(RequestProcessor.java:1493) at org.openide.explorer.propertysheet.PropertySheet.setNodes(PropertySheet.java:582) at org.netbeans.core.windows.view.ui.NbSheet.setNodes(NbSheet.java:308) at org.netbeans.core.windows.view.ui.NbSheet$Listener.activate(NbSheet.java:499) at org.netbeans.core.windows.view.ui.NbSheet$Listener.propertyChange(NbSheet.java:479) at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:339) at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:276) at org.netbeans.core.windows.RegistryImpl.tryFireChanges(RegistryImpl.java:313) at org.netbeans.core.windows.RegistryImpl.selectedNodesChanged(RegistryImpl.java:248) at org.netbeans.core.windows.WindowManagerImpl.notifyRegistrySelectedNodesChanged(WindowManagerImpl.java:1154) at org.netbeans.core.windows.WindowManagerImpl.topComponentActivatedNodesChanged(WindowManagerImpl.java:1354) at org.openide.windows.TopComponent.setActivatedNodesImpl(TopComponent.java:410) at org.openide.windows.TopComponent.access$400(TopComponent.java:111) at org.openide.windows.TopComponent$SynchronizeNodes.run(TopComponent.java:1920) at org.openide.windows.TopComponent$SynchronizeNodes.resultChanged(TopComponent.java:1902) at org.openide.util.lookup.ProxyLookup$1Notify.run(ProxyLookup.java:181) at org.openide.util.lookup.ProxyLookup.setLookups(ProxyLookup.java:190) at org.openide.util.lookup.ProxyLookup.setLookups(ProxyLookup.java:126) at org.openide.explorer.DefaultEMLookup.updateLookups(DefaultEMLookup.java:134) at org.openide.explorer.DefaultEMLookup.propertyChange(DefaultEMLookup.java:166) at org.openide.util.WeakListenerImpl$PropertyChange.propertyChange(WeakListenerImpl.java:196) at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:339) at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:276) 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$1AtomicSetSelectedNodes.fire(ExplorerManager.java:292) at org.openide.explorer.ExplorerManager.setSelectedNodes(ExplorerManager.java:303) at org.openide.explorer.ExplorerManager$1SetExploredContextAndSelection.run(ExplorerManager.java:397) at org.openide.util.Mutex.readAccess(Mutex.java:367) at org.openide.util.Mutex$1R.run(Mutex.java:1309) at org.openide.util.Mutex.doWrapperAccess(Mutex.java:1326) at org.openide.util.Mutex.readAccess(Mutex.java:356) at org.openide.explorer.ExplorerManager.setExploredContextAndSelection(ExplorerManager.java:418) at org.openide.explorer.view.BeanTreeView.selectionChanged(BeanTreeView.java:149) at org.openide.explorer.view.TreeView.callSelectionChanged(TreeView.java:849) at org.openide.explorer.view.TreeView$TreePropertyListener.run(TreeView.java:1491) at org.openide.util.Mutex$1Exec.run(Mutex.java:1246) at org.openide.nodes.Children$ProjectManagerDeadlockDetector.execute(Children.java:1921) at org.openide.util.Mutex.postRequest(Mutex.java:1252) at org.openide.util.Mutex.postRequest(Mutex.java:1215) at org.openide.util.Mutex.postReadRequest(Mutex.java:570) at org.openide.explorer.view.TreeView$TreePropertyListener.valueChanged(TreeView.java:1460) at javax.swing.tree.DefaultTreeSelectionModel.fireValueChanged(DefaultTreeSelectionModel.java:629) at javax.swing.tree.DefaultTreeSelectionModel.notifyPathChange(DefaultTreeSelectionModel.java:1078) at javax.swing.tree.DefaultTreeSelectionModel.setSelectionPaths(DefaultTreeSelectionModel.java:287) at javax.swing.tree.DefaultTreeSelectionModel.setSelectionPath(DefaultTreeSelectionModel.java:170) at javax.swing.JTree.setSelectionPath(JTree.java:1598) at javax.swing.plaf.basic.BasicTreeUI.selectPathForEvent(BasicTreeUI.java:2311) at javax.swing.plaf.basic.BasicTreeUI$Handler.handleSelection(BasicTreeUI.java:3520) at javax.swing.plaf.basic.BasicTreeUI$Handler.mousePressedDND(BasicTreeUI.java:3497) at javax.swing.plaf.basic.BasicTreeUI$Handler.mousePressed(BasicTreeUI.java:3456) at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:262) at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:262) at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:262) at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:262) at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:262) at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:262) at java.awt.Component.processMouseEvent(Component.java:6286) at javax.swing.JComponent.processMouseEvent(JComponent.java:3267) at java.awt.Component.processEvent(Component.java:6054) at java.awt.Container.processEvent(Container.java:2041) at java.awt.Component.dispatchEventImpl(Component.java:4652) at java.awt.Container.dispatchEventImpl(Container.java:2099) at java.awt.Component.dispatchEvent(Component.java:4482) at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4577) at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4235) at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168) at java.awt.Container.dispatchEventImpl(Container.java:2085) at java.awt.Window.dispatchEventImpl(Window.java:2478) at java.awt.Component.dispatchEvent(Component.java:4482) at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:644) at java.awt.EventQueue.access$000(EventQueue.java:85) at java.awt.EventQueue$1.run(EventQueue.java:603) at java.awt.EventQueue$1.run(EventQueue.java:601) at java.security.AccessController.doPrivileged(Native Method) at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87) at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98) at java.awt.EventQueue$2.run(EventQueue.java:617) at java.awt.EventQueue$2.run(EventQueue.java:615) at java.security.AccessController.doPrivileged(Native Method) at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87) at java.awt.EventQueue.dispatchEvent(EventQueue.java:614) at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:158) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161) [catch] at java.awt.EventDispatchThread.run(EventDispatchThread.java:122) Snippet in RegionNode.java: ----------------------------- class RegionNode extends AbstractNode { public RegionNode(String rName, Project pr) { super(new RegionChildren(rName, pr), new MyLookup()); } @Override public Sheet createSheet() { Sheet sheet=super.createSheet(); sheet.put(ProjectUtils.createRegionSheetSet(rName, project.getProjectDirectory())); return sheet; } }
project.org.jcae.netbeans.of.nodes.RegionNode is not part of NetBeans codeline. It should report to an author of that. I'm sorry we cannot fix it on NetBeans sources.