The cursor is found to be null during rendering:

java.lang.NullPointerException
      at org.icefaces.impl.context.DOMResponseWriter.appendToCursor(DOMResponseWriter.java:338)
      at org.icefaces.impl.context.DOMResponseWriter.write(DOMResponseWriter.java:126)
      at java.io.Writer.write(Writer.java:96)
      at com.sun.faces.renderkit.html_basic.FormRenderer.encodeBegin(FormRenderer.java:130)
      at org.icefaces.impl.renderkit.RendererWrapper.encodeBegin(RendererWrapper.java:50)
      at javax.faces.component.UIComponentBase.encodeBegin(UIComponentBase.java:820)
      at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1754)
      at org.icefaces.impl.context.DOMPartialRenderCallback.visit(DOMPartialViewContext.java:475)
      at com.sun.faces.component.visit.PartialVisitContext.invokeVisitCallback(PartialVisitContext.java:183)
      at javax.faces.component.UIForm.visitTree(UIForm.java:354)
      at javax.faces.component.UIComponent.visitTree(UIComponent.java:1600)
      at javax.faces.component.UINamingContainer.visitTree(UINamingContainer.java:163)
      at javax.faces.component.UIComponent.visitTree(UIComponent.java:1600)
      at javax.faces.component.UIComponent.visitTree(UIComponent.java:1600)
      at javax.faces.component.UIComponent.visitTree(UIComponent.java:1600)
      at javax.faces.component.UIComponent.visitTree(UIComponent.java:1600)
      at javax.faces.component.UIComponent.visitTree(UIComponent.java:1600)
      at javax.faces.component.UIComponent.visitTree(UIComponent.java:1600)
      at org.icefaces.impl.context.DOMPartialViewContext.renderSubtrees(DOMPartialViewContext.java:298)
      at org.icefaces.impl.context.DOMPartialViewContext.processPartial(DOMPartialViewContext.java:150)
      at javax.faces.component.UIViewRoot.encodeChildren(UIViewRoot.java:981)
      at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1756)
      at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:390)
      at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:131)
      at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:121)
      at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
      at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
      at javax.faces.webapp.FacesServlet.service(FacesServlet.java:410)
      ...