java.lang.NullPointerException
   at org.netbeans.core.windows.view.ViewHelper.setSplitWeights(ViewHelper.java:250)
   at org.netbeans.core.windows.view.DefaultView.userMovedSplit(DefaultView.java:743)
   at org.netbeans.core.windows.view.SplitView$1.propertyChange(SplitView.java:198)
   at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:339)
   at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:347)
   at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:276)
   at java.awt.Component.firePropertyChange(Component.java:8170)
   at org.netbeans.core.windows.view.ui.MultiSplitPane.access$400(MultiSplitPane.java:83)
   at org.netbeans.core.windows.view.ui.MultiSplitPane$MultiSplitLayout.layoutContainer(MultiSplitPane.java:684)
   at java.awt.Container.layout(Container.java:1419)
   at java.awt.Container.doLayout(Container.java:1408)
   at java.awt.Container.validateTree(Container.java:1505)
   at java.awt.Container.validate(Container.java:1478)
   at org.netbeans.core.windows.view.ui.MultiSplitPane.splitterMoved(MultiSplitPane.java:550)
   at org.netbeans.core.windows.view.ui.MultiSplitDivider.resize(MultiSplitDivider.java:235)
   at org.netbeans.core.windows.view.ui.MultiSplitDivider.dragTo(MultiSplitDivider.java:160)
   at org.netbeans.core.windows.view.ui.MultiSplitPane.mouseDragged(MultiSplitPane.java:270)
   at java.awt.Component.processMouseMotionEvent(Component.java:6345)
   at javax.swing.JComponent.processMouseMotionEvent(JComponent.java:3293)
   at java.awt.Component.processEvent(Component.java:6066)
   at java.awt.Container.processEvent(Container.java:2039)
   at java.awt.Component.dispatchEventImpl(Component.java:4660)
   at java.awt.Container.dispatchEventImpl(Container.java:2097)
   at java.awt.Component.dispatchEvent(Component.java:4488)
   at java.awt.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4575)
   at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:4253)
   at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.java:4166)
   at java.awt.Container.dispatchEventImpl(Container.java:2083)
   at java.awt.Window.dispatchEventImpl(Window.java:2489)
   at java.awt.Component.dispatchEvent(Component.java:4488)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:674)
   at java.awt.EventQueue.access$400(EventQueue.java:81)
   at java.awt.EventQueue$2.run(EventQueue.java:633)
   at java.awt.EventQueue$2.run(EventQueue.java:631)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
   at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98)
   at java.awt.EventQueue$3.run(EventQueue.java:647)
   at java.awt.EventQueue$3.run(EventQueue.java:645)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:644)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:162)
   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)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)