java.lang.NullPointerException at javax.faces.component.UIComponentBase.getRenderer(UIComponentBase.java:1203) at javax.faces.component.UIComponentBase.getRendersChildren(UIComponentBase.java:428) at org.netbeans.modules.visualweb.designer.jsf.DomProviderServiceImpl.findClosestRendersChildren(DomProviderServiceImpl.java:429) at org.netbeans.modules.visualweb.designer.jsf.DomProviderServiceImpl.getSourceElementWhichRendersChildren(DomProviderServiceImpl.java:396) at org.netbeans.modules.visualweb.css2.ModelViewMapper.findValidPosition(ModelViewMapper.java:2620) at org.netbeans.modules.visualweb.css2.ModelViewMapper.isValidPosition(ModelViewMapper.java:2485) at org.netbeans.modules.visualweb.css2.LineBox.computePosition(LineBox.java:863) at org.netbeans.modules.visualweb.css2.ModelViewMapper.findClosestPosition(ModelViewMapper.java:2035) at org.netbeans.modules.visualweb.css2.ModelViewMapper.viewToModel(ModelViewMapper.java:1982) at org.netbeans.modules.visualweb.designer.WebForm.viewToModel(WebForm.java:2336) at org.netbeans.modules.visualweb.designer.InteractionManager.updateDropState(InteractionManager.java:738) at org.netbeans.modules.visualweb.designer.InteractionManager$MouseHandler.mouseMoved(InteractionManager.java:3087) at java.awt.Component.processMouseMotionEvent(Component.java:6086) at javax.swing.JComponent.processMouseMotionEvent(JComponent.java:3283) at java.awt.Component.processEvent(Component.java:5810) at java.awt.Container.processEvent(Container.java:2058) at java.awt.Component.dispatchEventImpl(Component.java:4413) at java.awt.Container.dispatchEventImpl(Container.java:2116) at java.awt.Component.dispatchEvent(Component.java:4243) at java.awt.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4322) at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:3999) at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.java:3916) at java.awt.Container.dispatchEventImpl(Container.java:2102) at java.awt.Window.dispatchEventImpl(Window.java:2440) at java.awt.Component.dispatchEvent(Component.java:4243) 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)