java.lang.NullPointerException
	com.sun.faces.context.StateContext.startTrackViewModifications(StateContext.java:173)
	com.sun.faces.application.view.FaceletViewHandlingStrategy.restoreView(FaceletViewHandlingStrategy.java:515)
	com.sun.faces.application.view.MultiViewHandler.restoreView(MultiViewHandler.java:142)
	org.springframework.faces.webflow.FlowViewHandler.restoreFlowView(FlowViewHandler.java:144)
	org.springframework.faces.webflow.FlowViewHandler.restoreView(FlowViewHandler.java:83)
	javax.faces.application.ViewHandlerWrapper.restoreView(ViewHandlerWrapper.java:303)
	org.springframework.faces.webflow.FlowViewHandler.restoreFlowView(FlowViewHandler.java:144)
	org.springframework.faces.webflow.FlowViewHandler.restoreView(FlowViewHandler.java:83)
	org.springframework.faces.webflow.JsfViewFactory.getView(JsfViewFactory.java:105)
	org.springframework.webflow.engine.ViewState.resume(ViewState.java:193)
	org.springframework.webflow.engine.Flow.resume(Flow.java:545)
	org.springframework.webflow.engine.impl.FlowExecutionImpl.resume(FlowExecutionImpl.java:258)
	org.springframework.webflow.executor.FlowExecutorImpl.resumeExecution(FlowExecutorImpl.java:169)
	org.springframework.webflow.mvc.servlet.FlowHandlerAdapter.handle(FlowHandlerAdapter.java:183)
	org.springframework.faces.webflow.JsfFlowHandlerAdapter.handle(JsfFlowHandlerAdapter.java:48)
	org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:923)
	org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:852)
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)
	org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:778)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:717)