I'm using version 1.0.00.CR3.
Whole stacktrace of the browser (IE6):

anonymous wrote : 
  | javax.servlet.ServletException: Cannot get value for expression 
'#{purchaseOrder1.number}'
  |     javax.faces.webapp.FacesServlet.service(FacesServlet.java:121)
  |     
org.jboss.seam.servlet.SeamRedirectFilter.doFilter(SeamRedirectFilter.java:23)
  |     
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
  | 
  | 
  | root cause 
  | 
  | javax.faces.FacesException: Cannot get value for expression 
'#{purchaseOrder1.number}'
  |     
org.apache.myfaces.context.servlet.ServletExternalContextImpl.dispatch(ServletExternalContextImpl.java:421)
  |     
org.apache.myfaces.application.jsp.JspViewHandlerImpl.renderView(JspViewHandlerImpl.java:234)
  |     org.jboss.seam.jsf.SeamViewHandler.renderView(SeamViewHandler.java:59)
  |     
org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:352)
  |     javax.faces.webapp.FacesServlet.service(FacesServlet.java:107)
  |     
org.jboss.seam.servlet.SeamRedirectFilter.doFilter(SeamRedirectFilter.java:23)
  |     
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
  | 

whole stacktrace of jboss AS (hope this works):

anonymous wrote : 17:20:08,562 ERROR [STDERR] java.lang.NullPointerException
  | 17:20:08,562 ERROR [STDERR]     at 
org.jboss.seam.core.Pageflow.begin(Pageflow.java:191)
  | 17:20:08,562 ERROR [STDERR]     at 
org.jboss.seam.interceptors.ConversationInter
  | ceptor.beginNavigation(ConversationInterceptor.java:200)
  | 17:20:08,562 ERROR [STDERR]     at 
org.jboss.seam.interceptors.ConversationInter
  | ceptor.beginConversation(ConversationInterceptor.java:186)
  | 17:20:08,562 ERROR [STDERR]     at 
org.jboss.seam.interceptors.ConversationInter
  | ceptor.beginConversationIfNecessary(ConversationInterceptor.java:146)
  | 17:20:08,562 ERROR [STDERR]     at 
org.jboss.seam.interceptors.ConversationInter
  | ceptor.endOrBeginLongRunningConversation(ConversationInterceptor.java:70)
  | 17:20:08,562 ERROR [STDERR]     at 
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  | 17:20:08,562 ERROR [STDERR]     at 
sun.reflect.NativeMethodAccessorImpl.invoke(N
  | ativeMethodAccessorImpl.java:39)
  | 17:20:08,562 ERROR [STDERR]     at 
sun.reflect.DelegatingMethodAccessorImpl.invo
  | ke(DelegatingMethodAccessorImpl.java:25)
  | 17:20:08,562 ERROR [STDERR]     at 
java.lang.reflect.Method.invoke(Method.java:585)
  | 17:20:08,562 ERROR [STDERR]     at 
org.jboss.seam.util.Reflections.invoke(Reflections.java:13)
  | 17:20:08,562 ERROR [STDERR]     at 
org.jboss.seam.interceptors.Interceptor.aroundInvoke(Interceptor.java:87)
  | 17:20:08,562 ERROR [STDERR]     at 
org.jboss.seam.interceptors.SeamInvocationContext.proceed(SeamInvocationContext.java:60)
  | 17:20:08,562 ERROR [STDERR]     at 
org.jboss.seam.interceptors.BusinessProcessInterceptor.manageBusinessProcessContext(BusinessProcessInterceptor.java:60)
  | 17:20:08,562 ERROR [STDERR]     at 
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  | 17:20:08,562 ERROR [STDERR]     at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
  | 17:20:08,562 ERROR [STDERR]     at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  | 17:20:08,562 ERROR [STDERR]     at 
java.lang.reflect.Method.invoke(Method.java:585)
  | 17:20:08,562 ERROR [STDERR]     at 
org.jboss.seam.util.Reflections.invoke(Reflections.java:13)
  | 17:20:08,562 ERROR [STDERR]     at 
org.jboss.seam.interceptors.Interceptor.aroundInvoke(Interceptor.java:87)
  | 17:20:08,562 ERROR [STDERR]     at 
org.jboss.seam.interceptors.SeamInvocationContext.proceed(SeamInvocationContext.java:60)
  | 17:20:08,562 ERROR [STDERR]     at 
org.jboss.seam.interceptors.TransactionInterc
  | eptor.doInTransactionIfNecessary(TransactionInterceptor.java:34)
  | 17:20:08,562 ERROR [STDERR]     at 
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  | 17:20:08,562 ERROR [STDERR]     at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
  | 17:20:08,562 ERROR [STDERR]     at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  | 17:20:08,562 ERROR [STDERR]     at 
java.lang.reflect.Method.invoke(Method.java:585)
  | 17:20:08,562 ERROR [STDERR]     at 
org.jboss.seam.util.Reflections.invoke(Reflections.java:13)
  | 17:20:08,562 ERROR [STDERR]     at 
org.jboss.seam.interceptors.Interceptor.aroundInvoke(Interceptor.java:87)
  | 17:20:08,562 ERROR [STDERR]     at 
org.jboss.seam.interceptors.SeamInvocationContext.proceed(SeamInvocationContext.java:60)
  | 17:20:08,562 ERROR [STDERR]     at 
org.jboss.seam.interceptors.RemoveInterceptor.removeIfNecessary(RemoveInterceptor.java:39)
  | 17:20:08,562 ERROR [STDERR]     at 
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  | 17:20:08,562 ERROR [STDERR]     at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
  | 17:20:08,562 ERROR [STDERR]     at 
sun.reflect.DelegatingMethodAccessorImpl.invo
  | ke(DelegatingMethodAccessorImpl.java:25)
  | 17:20:08,562 ERROR [STDERR]     at 
java.lang.reflect.Method.invoke(Method.java:585)
  | 17:20:08,562 ERROR [STDERR]     at 
org.jboss.seam.util.Reflections.invoke(Reflections.java:13)
  | 17:20:08,562 ERROR [STDERR]     at 
org.jboss.seam.interceptors.Interceptor.aroundInvoke(Interceptor.java:87)
  | 17:20:08,562 ERROR [STDERR]     at 
org.jboss.seam.interceptors.SeamInvocationContext.proceed(SeamInvocationContext.java:60)
  | 17:20:08,562 ERROR [STDERR]     at 
org.jboss.seam.ejb.SeamInterceptor.aroundInvokeInContexts(SeamInterceptor.java:73)
  | 17:20:08,562 ERROR [STDERR]     at 
org.jboss.seam.ejb.SeamInterceptor.aroundInvoke(SeamInterceptor.java:45)
  | 17:20:08,562 ERROR [STDERR]     at 
org.jboss.seam.interceptors.JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:51)
  | 17:20:08,562 ERROR [STDERR]     at 
org.jboss.seam.interceptors.JavaBeanInterceptor.intercept(JavaBeanInterceptor.java:39)
  | 17:20:08,562 ERROR [STDERR]     at 
com.jaxfront.seam.PurchaseOrder1$$EnhancerByCGLIB$$71ee1296.begin()
  | 17:20:08,562 ERROR [STDERR]     at 
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  | 17:20:08,562 ERROR [STDERR]     at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
  | 17:20:08,562 ERROR [STDERR]     at 
sun.reflect.DelegatingMethodAccessorImpl.invo
  | ke(DelegatingMethodAccessorImpl.java:25)
  | 17:20:08,562 ERROR [STDERR]     at 
java.lang.reflect.Method.invoke(Method.java:585)
  | 17:20:08,562 ERROR [STDERR]     at 
org.jboss.seam.util.Reflections.invoke(Reflections.java:13)
  | 17:20:08,562 ERROR [STDERR]     at 
org.jboss.seam.util.Reflections.invokeAndWrap(Reflections.java:32)
  | 17:20:08,562 ERROR [STDERR]     at 
org.jboss.seam.Component.callComponentMethod(Component.java:1239)
  | 17:20:08,562 ERROR [STDERR]     at 
org.jboss.seam.Component.callCreateMethod(Component.java:1227)
  | 17:20:08,562 ERROR [STDERR]     at 
org.jboss.seam.Component.newInstance(Component.java:1216)
  | 17:20:08,562 ERROR [STDERR]     at 
org.jboss.seam.Component.getInstance(Component.java:1168)
  | 17:20:08,562 ERROR [STDERR]     at 
org.jboss.seam.Component.getInstance(Component.java:1151)
  | 17:20:08,562 ERROR [STDERR]     at 
org.jboss.seam.jsf.SeamVariableResolver.resolveVariable(SeamVariableResolver.java:44)
  | 17:20:08,562 ERROR [STDERR]     at 
org.apache.myfaces.el.ValueBindingImpl$ELVari
  | ableResolver.resolveVariable(ValueBindingImpl.java:569)
  | 17:20:08,562 ERROR [STDERR]     at 
org.apache.commons.el.NamedValue.evaluate(NamedValue.java:124)
  | 17:20:08,562 ERROR [STDERR]     at 
org.apache.commons.el.ComplexValue.evaluate(ComplexValue.java:140)
  | 17:20:08,562 ERROR [STDERR]     at 
org.apache.myfaces.el.ValueBindingImpl.getValue(ValueBindingImpl.java:378)
  | 17:20:08,578 ERROR [STDERR]     at 
javax.faces.component.UIOutput.getValue(UIOutput.java:75)
  | 17:20:08,578 ERROR [STDERR]     at 
org.apache.myfaces.renderkit.RendererUtils.getStringValue(RendererUtils.java:225)
  | 17:20:08,578 ERROR [STDERR]     at 
org.apache.myfaces.renderkit.html.HtmlTextRendererBase.renderOutput(HtmlTextRendererBase.java:65)
  | 17:20:08,578 ERROR [STDERR]     at 
org.apache.myfaces.renderkit.html.HtmlTextRendererBase.encodeEnd(HtmlTextRendererBase.java:53)
  | 17:20:08,578 ERROR [STDERR]     at 
javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:331)
  | 17:20:08,578 ERROR [STDERR]     at 
javax.faces.webapp.UIComponentTag.encodeEnd(UIComponentTag.java:349)
  | 17:20:08,578 ERROR [STDERR]     at 
javax.faces.webapp.UIComponentTag.doEndTag(UIComponentTag.java:253)
  | 17:20:08,578 ERROR [STDERR]     at 
org.apache.jsp.purchaseOrder1_jsp._jspx_meth_h_outputText_0(purchaseOrder1_jsp.java:166)
  | 17:20:08,578 ERROR [STDERR]     at 
org.apache.jsp.purchaseOrder1_jsp._jspx_meth_h_form_0(purchaseOrder1_jsp.java:137)
  | 17:20:08,578 ERROR [STDERR]     at 
org.apache.jsp.purchaseOrder1_jsp._jspx_meth_f_view_0(purchaseOrder1_jsp.java:105)
  | 17:20:08,578 ERROR [STDERR]     at 
org.apache.jsp.purchaseOrder1_jsp._jspService(purchaseOrder1_jsp.java:69)
  | 17:20:08,578 ERROR [STDERR]     at 
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
  | 17:20:08,578 ERROR [STDERR]     at 
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
  | 17:20:08,578 ERROR [STDERR]     at 
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:332)
  | 17:20:08,578 ERROR [STDERR]     at 
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
  | 17:20:08,578 ERROR [STDERR]     at 
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
  | 17:20:08,578 ERROR [STDERR]     at 
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
  | 17:20:08,578 ERROR [STDERR]     at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
  | 17:20:08,578 ERROR [STDERR]     at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
  | 17:20:08,578 ERROR [STDERR]     at 
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
  | 17:20:08,578 ERROR [STDERR]     at 
org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463)
  | 17:20:08,578 ERROR [STDERR]     at 
org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398)
  | 17:20:08,578 ERROR [STDERR]     at 
org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
  | 17:20:08,578 ERROR [STDERR]     at 
org.apache.myfaces.context.servlet.ServletExternalContextImpl.dispatch(ServletExternalContextImpl.java:415)
  | 17:20:08,578 ERROR [STDERR]     at 
org.apache.myfaces.application.jsp.JspViewHandlerImpl.renderView(JspViewHandlerImpl.java:234)
  | 17:20:08,578 ERROR [STDERR]     at 
org.jboss.seam.jsf.SeamViewHandler.renderView(SeamViewHandler.java:59)
  | 17:20:08,578 ERROR [STDERR]     at 
org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:352)
  | 17:20:08,578 ERROR [STDERR]     at 
javax.faces.webapp.FacesServlet.service(FacesServlet.java:107)
  | 17:20:08,578 ERROR [STDERR]     at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
  | 17:20:08,578 ERROR [STDERR]     at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
  | 17:20:08,578 ERROR [STDERR]     at 
org.jboss.seam.servlet.SeamRedirectFilter.doFilter(SeamRedirectFilter.java:23)
  | 17:20:08,578 ERROR [STDERR]     at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
  | 17:20:08,578 ERROR [STDERR]     at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
  | 17:20:08,578 ERROR [STDERR]     at 
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
  | 17:20:08,578 ERROR [STDERR]     at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
  | 17:20:08,578 ERROR [STDERR]     at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
  | 17:20:08,578 ERROR [STDERR]     at 
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
  | 17:20:08,578 ERROR [STDERR]     at 
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
  | 17:20:08,578 ERROR [STDERR]     at 
org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175)
  | 17:20:08,578 ERROR [STDERR]     at 
org.jboss.web.tomcat.security.JaccContextValv
  | e.invoke(JaccContextValve.java:74)
  | 17:20:08,578 ERROR [STDERR]     at 
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
  | 17:20:08,578 ERROR [STDERR]     at 
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
  | 17:20:08,578 ERROR [STDERR]     at 
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
  | 17:20:08,578 ERROR [STDERR]     at 
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
  | 17:20:08,578 ERROR [STDERR]     at 
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
  | 17:20:08,578 ERROR [STDERR]     at 
org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
  | 17:20:08,578 ERROR [STDERR]     at 
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
  | 17:20:08,578 ERROR [STDERR]     at 
org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
  | 17:20:08,578 ERROR [STDERR]     at java.lang.Thread.run(Thread.java:595)
  | 17:20:08,578 ERROR [[jsp]] Servlet.service() for servlet jsp threw exception
  | javax.faces.el.EvaluationException: Cannot get value for expression 
'#{purchaseOrder1.number}'        at 
org.apache.myfaces.el.ValueBindingImpl.getValue(ValueBindingImpl.java
  | :397)
  |         at javax.faces.component.UIOutput.getValue(UIOutput.java:75)
  |         at 
org.apache.myfaces.renderkit.RendererUtils.getStringValue(RendererUtils.java:225)
  |         at 
org.apache.myfaces.renderkit.html.HtmlTextRendererBase.renderOutput(HtmlTextRendererBase.java:65)
  |         at 
org.apache.myfaces.renderkit.html.HtmlTextRendererBase.encodeEnd(HtmlTextRendererBase.java:53)
  |         at 
javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:331)
  |         at 
javax.faces.webapp.UIComponentTag.encodeEnd(UIComponentTag.java:349)
  |         at 
javax.faces.webapp.UIComponentTag.doEndTag(UIComponentTag.java:253)
  |         at 
org.apache.jsp.purchaseOrder1_jsp._jspx_meth_h_outputText_0(purchaseO
  | rder1_jsp.java:166)
  |         at 
org.apache.jsp.purchaseOrder1_jsp._jspx_meth_h_form_0(purchaseOrder1_
  | jsp.java:137)
  |         at 
org.apache.jsp.purchaseOrder1_jsp._jspx_meth_f_view_0(purchaseOrder1_
  | jsp.java:105)
  |         at 
org.apache.jsp.purchaseOrder1_jsp._jspService(purchaseOrder1_jsp.java:69)
  |         at 
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
  |         at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
  |         at 
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:332)
  |         at 
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:3
  | 14)
  |         at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
  |         at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
  |         at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
  |         at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
  |         at 
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
  |         at 
org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463)
  |         at 
org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398)
  |         at 
org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
  |         at 
org.apache.myfaces.context.servlet.ServletExternalContextImpl.dispatch(ServletExternalContextImpl.java:415)
  |         at 
org.apache.myfaces.application.jsp.JspViewHandlerImpl.renderView(JspViewHandlerImpl.java:234)
  |         at 
org.jboss.seam.jsf.SeamViewHandler.renderView(SeamViewHandler.java:59)
  |         at 
org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:352)
  |         at javax.faces.webapp.FacesServlet.service(FacesServlet.java:107)
  |         at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
  |         at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
  |         at 
org.jboss.seam.servlet.SeamRedirectFilter.doFilter(SeamRedirectFilter.java:23)
  |         at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
  |         at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
  |         at 
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
  |         at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
  |         at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
  |         at 
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
  |         at 
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
  |         at 
org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175)
  |         at 
org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
  |         at 
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
  |         at 
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
  |         at 
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
  |         at 
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
  |         at 
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
  |         at 
org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.p
  | rocessConnection(Http11BaseProtocol.java:664)
  |         at 
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
  |         at 
org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
  |         at java.lang.Thread.run(Thread.java:595)
  | Caused by: java.lang.NullPointerException
  |         at org.jboss.seam.core.Pageflow.begin(Pageflow.java:191)
  |         at 
org.jboss.seam.interceptors.ConversationInterceptor.beginNavigation(ConversationInterceptor.java:200)
  |         at 
org.jboss.seam.interceptors.ConversationInterceptor.beginConversation
  | (ConversationInterceptor.java:186)
  |         at 
org.jboss.seam.interceptors.ConversationInterceptor.beginConversationIfNecessary(ConversationInterceptor.java:146)
  |         at 
org.jboss.seam.interceptors.ConversationInterceptor.endOrBeginLongRunningConversation(ConversationInterceptor.java:70)
  |         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  |         at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
  |         at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |         at java.lang.reflect.Method.invoke(Method.java:585)
  |         at org.jboss.seam.util.Reflections.invoke(Reflections.java:13)
  |         at 
org.jboss.seam.interceptors.Interceptor.aroundInvoke(Interceptor.java:87)
  |         at 
org.jboss.seam.interceptors.SeamInvocationContext.proceed(SeamInvocationContext.java:60)
  |         at 
org.jboss.seam.interceptors.BusinessProcessInterceptor.manageBusiness
  | ProcessContext(BusinessProcessInterceptor.java:60)
  |         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  |         at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
  |         at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |         at java.lang.reflect.Method.invoke(Method.java:585)
  |         at org.jboss.seam.util.Reflections.invoke(Reflections.java:13)
  |         at 
org.jboss.seam.interceptors.Interceptor.aroundInvoke(Interceptor.java:87)
  |         at 
org.jboss.seam.interceptors.SeamInvocationContext.proceed(SeamInvocationContext.java:60)
  |         at 
org.jboss.seam.interceptors.TransactionInterceptor.doInTransactionIfN
  | ecessary(TransactionInterceptor.java:34)
  |         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  |         at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
  |         at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |         at java.lang.reflect.Method.invoke(Method.java:585)
  |         at org.jboss.seam.util.Reflections.invoke(Reflections.java:13)
  |         at 
org.jboss.seam.interceptors.Interceptor.aroundInvoke(Interceptor.java:87)
  |         at 
org.jboss.seam.interceptors.SeamInvocationContext.proceed(SeamInvocationContext.java:60)
  |         at 
org.jboss.seam.interceptors.RemoveInterceptor.removeIfNecessary(RemoveInterceptor.java:39)
  |         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  |         at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
  |         at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |         at java.lang.reflect.Method.invoke(Method.java:585)
  |         at org.jboss.seam.util.Reflections.invoke(Reflections.java:13)
  |         at 
org.jboss.seam.interceptors.Interceptor.aroundInvoke(Interceptor.java:87)
  |         at 
org.jboss.seam.interceptors.SeamInvocationContext.proceed(SeamInvocationContext.java:60)
  |         at 
org.jboss.seam.ejb.SeamInterceptor.aroundInvokeInContexts(SeamInterceptor.java:73)
  |         at 
org.jboss.seam.ejb.SeamInterceptor.aroundInvoke(SeamInterceptor.java:45)
  |         at 
org.jboss.seam.interceptors.JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:51)
  |         at 
org.jboss.seam.interceptors.JavaBeanInterceptor.intercept(JavaBeanInterceptor.java:39)
  |         at 
com.jaxfront.seam.PurchaseOrder1$$EnhancerByCGLIB$$71ee1296.begin(<ge
  | nerated>)
  |         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  |         at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
  | java:39)
  |         at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
  | sorImpl.java:25)
  |         at java.lang.reflect.Method.invoke(Method.java:585)
  |         at org.jboss.seam.util.Reflections.invoke(Reflections.java:13)
  |         at 
org.jboss.seam.util.Reflections.invokeAndWrap(Reflections.java:32)
  |         at org.jboss.seam.Component.callComponentMethod(Component.java:1239)
  |         at org.jboss.seam.Component.callCreateMethod(Component.java:1227)
  |         at org.jboss.seam.Component.newInstance(Component.java:1216)
  |         at org.jboss.seam.Component.getInstance(Component.java:1168)
  |         at org.jboss.seam.Component.getInstance(Component.java:1151)
  |         at 
org.jboss.seam.jsf.SeamVariableResolver.resolveVariable(SeamVariableResolver.java:44)
  |         at 
org.apache.myfaces.el.ValueBindingImpl$ELVariableResolver.resolveVari
  | able(ValueBindingImpl.java:569)
  |         at org.apache.commons.el.NamedValue.evaluate(NamedValue.java:124)
  |         at 
org.apache.commons.el.ComplexValue.evaluate(ComplexValue.java:140)
  |         at 
org.apache.myfaces.el.ValueBindingImpl.getValue(ValueBindingImpl.java:378)
  |         ... 49 more
  | 17:20:08,578 ERROR [[Faces Servlet]] Servlet.service() for servlet Faces 
Servlet threw exception
  | javax.faces.FacesException: Cannot get value for expression 
'#{purchaseOrder1.number}'
  |         at 
org.apache.myfaces.context.servlet.ServletExternalContextImpl.dispatch(ServletExternalContextImpl.java:421)
  |         at 
org.apache.myfaces.application.jsp.JspViewHandlerImpl.renderView(JspViewHandlerImpl.java:234)
  |         at 
org.jboss.seam.jsf.SeamViewHandler.renderView(SeamViewHandler.java:59)
  |         at 
org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:352)
  |         at javax.faces.webapp.FacesServlet.service(FacesServlet.java:107)
  |         at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
  | icationFilterChain.java:252)
  |         at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
  | ilterChain.java:173)
  |         at 
org.jboss.seam.servlet.SeamRedirectFilter.doFilter(SeamRedirectFilter.java:23)
  |         at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
  |         at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
  |         at 
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
  
  |       at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
  | icationFilterChain.java:202)
  |         at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
  |         at 
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
  |         at 
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
  |         at 
org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175)
  |         at 
org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
  |         at 
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
  |         at 
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
  |         at 
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
  |         at 
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
  |         at 
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
  |         at 
org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.p
  | rocessConnection(Http11BaseProtocol.java:664)
  |         at 
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
  |         at 
org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
  |         at java.lang.Thread.run(Thread.java:595)
  | Caused by: org.apache.jasper.JasperException: Cannot get value for 
expression '#{purchaseOrder1.number}'
  |         at 
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:510)
  |         at 
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393)
  |         at 
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
  |         at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
  |         at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
  |         at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
  |         at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
  |         at 
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
  |         at 
org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463)
  |         at 
org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398)
  |         at 
org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
  |         at 
org.apache.myfaces.context.servlet.ServletExternalContextImpl.dispatc
  | h(ServletExternalContextImpl.java:415)
  |         ... 25 more

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