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In the FTP explorer, right-click and select Properties from the popup menu. When you change the Sort mode of a folder to "By modification time", you get a NPE as described below. java.lang.NullPointerException at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:65) at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:123) at java.io.FilterOutputStream.close(FilterOutputStream.java:140) at sun.nio.cs.StreamEncoder.implClose(StreamEncoder.java:301) at sun.nio.cs.StreamEncoder.close(StreamEncoder.java:130) at java.io.OutputStreamWriter.close(OutputStreamWriter.java:216) at java.io.PrintWriter.close(PrintWriter.java:295) at org.openide.filesystems.DefaultAttributes.saveTable(DefaultAttributes.java:593) at org.openide.filesystems.DefaultAttributes.writeAttribute(DefaultAttributes.java:436) at org.openide.filesystems.AbstractFileObject.setAttribute(AbstractFileObject.java:350) at org.openide.filesystems.AbstractFileObject.setAttribute(AbstractFileObject.java:333) at org.openide.loaders.DataFolder$SortMode.write(DataFolder.java:1070) at org.openide.loaders.FolderOrder.setSortMode(FolderOrder.java:99) at org.openide.loaders.DataFolder.setSortMode(DataFolder.java:220) at org.openide.loaders.DataFolder$FolderNode$1.setValue(DataFolder.java:1246) at org.openide.loaders.DataFolder$FolderNode$1.setValue(DataFolder.java:1252) at org.openide.explorer.propertysheet.NodePropertyModel.setValue(NodePropertyModel.java:110) at org.openide.explorer.propertysheet.PropUtils.noDlgUpdateProp(PropUtils.java:561) at org.openide.explorer.propertysheet.PropUtils.updateProp(PropUtils.java:522) at org.openide.explorer.propertysheet.PropUtils.updateProp(PropUtils.java:634) at org.openide.explorer.propertysheet.SheetCellEditor.stopCellEditing(SheetCellEditor.java:374) at org.openide.explorer.propertysheet.SheetCellEditor.actionPerformed(SheetCellEditor.java:241) at javax.swing.JComboBox.fireActionEvent(JComboBox.java:1242) at org.openide.explorer.propertysheet.ComboInplaceEditor.fireActionEvent(ComboInplaceEditor.java:213) at javax.swing.JComboBox.setSelectedItem(JComboBox.java:569) at org.openide.explorer.propertysheet.ComboInplaceEditor.setSelectedItem(ComboInplaceEditor.java:193) at javax.swing.JComboBox.setSelectedIndex(JComboBox.java:605) at javax.swing.plaf.basic.BasicComboPopup$Handler.mouseReleased(BasicComboPopup.java:814) at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:273) at java.awt.Component.processMouseEvent(Component.java:6038) at javax.swing.JComponent.processMouseEvent(JComponent.java:3260) at javax.swing.plaf.basic.BasicComboPopup$1.processMouseEvent(BasicComboPopup.java:480) at java.awt.Component.processEvent(Component.java:5803) at java.awt.Container.processEvent(Container.java:2058) at java.awt.Component.dispatchEventImpl(Component.java:4410) at java.awt.Container.dispatchEventImpl(Container.java:2116) at java.awt.Component.dispatchEvent(Component.java:4240) at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4322) at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3986) at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3916) at java.awt.Container.dispatchEventImpl(Container.java:2102) at java.awt.Window.dispatchEventImpl(Window.java:2429) at java.awt.Component.dispatchEvent(Component.java:4240) [catch] at java.awt.EventQueue.dispatchEvent(EventQueue.java:599) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160) at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)