[jboss-user] [JBoss Seam] - org.jboss.seam.core.messages error

[Stateless Bean]

Hi,
Sometimes and in all cases, when i use my app my jboss throw this error:


  | 22:45:32,375 ERROR [STDERR] 2007-09-07 22:45:32 com.sun.facelets.FaceletViewHand
  | ler handleRenderException
  | SEVERE: Error Rendering View[/pages/Buildings.xhtml]
  | javax.el.ELException: /pages/Buildings.xhtml: Cannot get value for expression '#{org.jboss.seam.core.messages}'
  |         at com.sun.facelets.compiler.TextInstruction.write(TextInstruction.java:
  | 48)
  |         at com.sun.facelets.compiler.UIInstructions.encodeBegin(UIInstructions.j
  | ava:39)
  |         at org.apache.myfaces.shared_impl.renderkit.RendererUtils.renderChild(Re
  | ndererUtils.java:433)
  |         at org.apache.myfaces.shared_impl.renderkit.RendererUtils.renderChildren
  | (RendererUtils.java:419)
  |         at org.apache.myfaces.shared_impl.renderkit.RendererUtils.renderChild(Re
  | ndererUtils.java:440)
  |         at org.apache.myfaces.shared_impl.renderkit.html.HtmlTableRendererBase.r
  | enderColumnBody(HtmlTableRendererBase.java:332)
  |         at org.apache.myfaces.shared_impl.renderkit.html.HtmlTableRendererBase.e
  | ncodeColumnChild(HtmlTableRendererBase.java:301)
  |         at org.apache.myfaces.shared_impl.renderkit.html.HtmlTableRendererBase.e
  | ncodeInnerHtml(HtmlTableRendererBase.java:277)
  |         at org.apache.myfaces.shared_impl.renderkit.html.HtmlTableRendererBase.e
  | ncodeChildren(HtmlTableRendererBase.java:123)
  |         at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.
  | java:524)
  |         at com.sun.facelets.tag.jsf.ComponentSupport.encodeRecursive(ComponentSu
  | pport.java:244)
  |         at com.sun.facelets.tag.jsf.ComponentSupport.encodeRecursive(ComponentSu
  | pport.java:249)
  |         at com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.jav
  | a:573)
  |         at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:
  | 384)
  |         at javax.faces.webapp.FacesServlet.service(FacesServlet.java:138)
  |         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.web.RedirectFilter.doFilter(RedirectFilter.java:45)
  |         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
  | icationFilterChain.java:202)
  |         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
  | ilterChain.java:173)
  |         at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:57)
  |         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
  | icationFilterChain.java:202)
  |         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
  | ilterChain.java:173)
  |         at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFi
  | lter.java:96)
  |         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
  | icationFilterChain.java:202)
  |         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
  | ilterChain.java:173)
  |         at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV
  | alve.java:213)
  |         at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV
  | alve.java:178)
  |         at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(Securit
  | yAssociationValve.java:175)
  |         at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValv
  | e.java:74)
  |         at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j
  | ava:126)
  |         at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j
  | ava:105)
  |         at org.jboss.web.tomcat.tc5.jca.CachedConnectionValve.invoke(CachedConne
  | ctionValve.java:156)
  |         at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal
  | ve.java:107)
  |         at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav
  | a:148)
  |         at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java
  | :869)
  |         at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.p
  | rocessConnection(Http11BaseProtocol.java:664)
  |         at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpo
  | int.java:527)
  |         at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWor
  | kerThread.java:112)
  |         at java.lang.Thread.run(Thread.java:595)
  | Caused by: java.lang.NullPointerException
  |         at org.jboss.mx.loading.RepositoryClassLoader.findClass(RepositoryClassL
  | oader.java:620)
  |         at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
  |         at org.jboss.mx.loading.RepositoryClassLoader.loadClassImpl(RepositoryCl
  | assLoader.java:464)
  |         at org.jboss.mx.loading.RepositoryClassLoader.loadClass(RepositoryClassL
  | oader.java:405)
  |         at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
  |         at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
  |         at org.apache.myfaces.application.ApplicationImpl.getPropertyResolver(Ap
  | plicationImpl.java:198)
  |         at org.jboss.seam.jsf.SeamApplication11.getPropertyResolver(SeamApplicat
  | ion11.java:197)
  |         at org.apache.myfaces.el.ELParserHelper$MyPropertySuffix.evaluate(ELPars
  | erHelper.java:532)
  |         at org.apache.commons.el.ComplexValue.evaluate(ComplexValue.java:145)
  |         at org.apache.myfaces.el.ValueBindingImpl.getValue(ValueBindingImpl.java
  | :383)
  |         at org.jboss.seam.core.Expressions$1.getValue(Expressions.java:69)
  |         at org.jboss.seam.Component.getInstanceFromFactory(Component.java:1684)
  |         at org.jboss.seam.Component.getInstance(Component.java:1633)
  |         at org.jboss.seam.Component.getInstance(Component.java:1610)
  |         at org.jboss.seam.jsf.SeamVariableResolver.resolveVariable(SeamVariableR
  | esolver.java:53)
  |         at org.apache.myfaces.config.LastVariableResolverInChain.resolveVariable
  | (LastVariableResolverInChain.java:42)
  |         at com.sun.facelets.el.LegacyELContext$LegacyELResolver.getValue(LegacyE
  | LContext.java:134)
  |         at com.sun.el.parser.AstIdentifier.getValue(AstIdentifier.java:73)
  |         at com.sun.el.parser.AstValue.getValue(AstValue.java:114)
  |         at com.sun.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:195)
  | 
  |         at com.sun.facelets.el.ELText$ELTextVariable.writeText(ELText.java:184)
  |         at com.sun.facelets.el.ELText$ELTextComposite.writeText(ELText.java:108)
  | 
  |         at com.sun.facelets.compiler.TextInstruction.write(TextInstruction.java:
  | 45)
  |         ... 39 more
  | 
  | 

Can anybody help me, to fix it?

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