[jboss-user] [JBoss Seam] - java.lang.NoClassDefFoundError: javax/el/ELContext

[ejbengine]

I'm getting a java.lang.NoClassDefFoundError: javax/el/ELContext  
error when JBoss is launching and trying to deploy a war file .Part of the stack trace is :
anonymous wrote : 
  | 14:50:55,615 ERROR [[/shoppingcart]] Exception sending context initialized event to listener instance of class org.jboss.seam.servlet.SeamListener
  | java.lang.RuntimeException: Could not create Component: org.jboss.seam.core.expressions
  | 	at org.jboss.seam.init.Initialization.addComponent(Initialization.java:908)
  | 	at org.jboss.seam.init.Initialization.installComponents(Initialization.java:839)
  | 	at org.jboss.seam.init.Initialization.init(Initialization.java:506)
  | 	at org.jboss.seam.servlet.SeamListener.contextInitialized(SeamListener.java:34)
  | 	at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3763)
  | 	at org.apache.catalina.core.StandardContext.start(StandardContext.java:4211)
  | 	at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:759)
  | 	at org.apache.catalina.core.Contai
  | 
and :

	anonymous wrote : at java.lang.Thread.run(Unknown Source)
  | Caused by: java.lang.NoClassDefFoundError: javax/el/ELContext
  | 	at java.lang.Class.getDeclaredMethods0(Native Method)
  | 	at java.lang.Class.privateGetDeclaredMethods(Unknown Source)
  | 	at java.lang.Class.getDeclaredMethods(Unknown Source)
  | 	at org.jboss.seam.Component.initMembers(Component.java:492)
  | 	at org.jboss.seam.Component.(Component.java:247)
  | 	at org.jboss.seam.Component.(Component.java:207)
  | 14:50:55,631 ERROR [StandardContext] Error listenerStart
  | 14:50:55,631 ERROR [StandardContext] Context [/shoppingcart] startup failed due to previous errors
  | 




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