Sometimes I see this exception:
javax.faces.el.EvaluationException: Cannot get value for expression '#{project.type == 1}' at org.apache.myfaces.el.ValueBindingImpl.getValue(ValueBindingImpl.java:402) at javax.faces.component.UIComponentBase.isRendered(UIComponentBase.java:1075) Caused by: java.lang.NullPointerException at org.jboss.mx.loading.RepositoryClassLoader.findClass(RepositoryClassLoader.java:620) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at org.jboss.mx.loading.RepositoryClassLoader.loadClassImpl(RepositoryClassLoader.java:464) at org.jboss.mx.loading.RepositoryClassLoader.loadClass(RepositoryClassLoader.java:405) at java.lang.ClassLoader.loadClass(ClassLoader.java:251) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319) at org.jboss.seam.jsf.SeamApplication11.getPropertyResolver(SeamApplication11.java:168) at org.apache.myfaces.el.ELParserHelper$MyPropertySuffix.evaluate(ELParserHelper.java:532) at org.apache.commons.el.ComplexValue.evaluate(ComplexValue.java:145) at org.apache.commons.el.BinaryOperatorExpression.evaluate(BinaryOperatorExpression.java:154) at org.apache.myfaces.el.ValueBindingImpl.getValue(ValueBindingImpl.java:383) ... 97 more