Method expression parameters causes MethodNotFoundException

21:08:22,931 WARNING [javax.enterprise.resource.webcontainer.jsf.lifecycle] (http-localhost-127.0.0.1-8080-5) #{activeActions.select(active.parentId)}: java.lang.NullPointerException: javax.faces.FacesException: #{activeActions.select(active.serviceAgreement.parentId)}: java.lang.NullPointerException
          at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:110) [jsf-impl-2.1.5-jbossorg-1.jar:2.1.5-SNAPSHOT]
          at javax.faces.component.UICommand.broadcast(UICommand.java:315) [jboss-jsf-api_2.1_spec-2.0.0.Beta1.jar:2.0.0.Beta1]
          at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:794) [jboss-jsf-api_2.1_spec-2.0.0.Beta1.jar:2.0.0.Beta1]
          at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1259) [jboss-jsf-api_2.1_spec-2.0.0.Beta1.jar:2.0.0.Beta1]
          at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81) [jsf-impl-2.1.5-jbossorg-1.jar:2.1.5-SNAPSHOT]
          at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) [jsf-impl-2.1.5-jbossorg-1.jar:2.1.5-SNAPSHOT]
          at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118) [jsf-impl-2.1.5-jbossorg-1.jar:2.1.5-SNAPSHOT]
          at javax.faces.webapp.FacesServlet.service(FacesServlet.java:593) [jboss-jsf-api_2.1_spec-2.0.0.Beta1.jar:2.0.0.Beta1]
          at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:329) [jbossweb-7.0.7.Final.jar:]
          at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jbossweb-7.0.7.Final.jar:]
          at org.jboss.weld.servlet.ConversationPropagationFilter.doFilter(ConversationPropagationFilter.java:62) [weld-core-1.1.4.Final.jar:2011-11-22 20:01]
          at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280) [jbossweb-7.0.7.Final.jar:]
          at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jbossweb-7.0.7.Final.jar:]
          at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:275) [jbossweb-7.0.7.Final.jar:]
          at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161) [jbossweb-7.0.7.Final.jar:]
          at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:489) [jbossweb-7.0.7.Final.jar:]
          at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:151) [jboss-as-web-7.1.0.CR1b.jar:7.1.0.CR1b]
          at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:155) [jbossweb-7.0.7.Final.jar:]
          at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) [jbossweb-7.0.7.Final.jar:]
          at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) [jbossweb-7.0.7.Final.jar:]
          at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:362) [jbossweb-7.0.7.Final.jar:]
          at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:897) [jbossweb-7.0.7.Final.jar:]
          at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:626) [jbossweb-7.0.7.Final.jar:]
          at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:2033) [jbossweb-7.0.7.Final.jar:]
          at java.lang.Thread.run(Thread.java:679) [:1.6.0_23]
Caused by: javax.faces.el.MethodNotFoundException: java.lang.NullPointerException
          at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:104) [jboss-jsf-api_2.1_spec-2.0.0.Beta1.jar:2.0.0.Beta1]
          at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102) [jsf-impl-2.1.5-jbossorg-1.jar:2.1.5-SNAPSHOT]
          ... 24 more
Caused by: java.lang.NullPointerException
          at java.lang.Class.isAssignableFrom(Native Method) [:1.6.0_23]
          at org.apache.el.util.ReflectionUtil.isAssignableFrom(ReflectionUtil.java:299) [jbossweb-7.0.7.Final.jar:]
          at org.apache.el.util.ReflectionUtil.getMethod(ReflectionUtil.java:172) [jbossweb-7.0.7.Final.jar:]
          at org.apache.el.parser.AstValue.invoke(AstValue.java:251) [jbossweb-7.0.7.Final.jar:]
          at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:278) [jbossweb-7.0.7.Final.jar:]
          at org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:39) [weld-core-1.1.4.Final.jar:2011-11-22 20:01]
          at org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:50) [weld-core-1.1.4.Final.jar:2011-11-22 20:01]
          at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105) [jsf-impl-2.1.5-jbossorg-1.jar:2.1.5-SNAPSHOT]
          at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:88) [jboss-jsf-api_2.1_spec-2.0.0.Beta1.jar:2.0.0.Beta1]
          ... 25 more