Here is the relevant section from the XHTML

anonymous wrote : 
  |                             <ice:dataTable value="#{slaBeanList}"
  |                                                        var="slaBean"
  |                                                        
styleClass="wdgt-data-table"
  |                                                        
columnClasses="wdgt-vert-l, widget-box-body, widget-box-body, wdgt-vert-r"
  |                                                        rowClasses="odd-row, 
even-row"
  |                                                        
headerClass="wdgt-header"
  |                                                        
footerClass="wdgt-footer">
  |                             
  |                                     <ice:column>
  |                                             <f:facet name="header">
  |                                                     <ice:graphicImage 
url="img/spacer.gif" styleClass="wdgt-hdr-l"/>
  |                                             </f:facet>
  |                                             <f:facet name="footer">
  |                                                     <ice:graphicImage 
url="img/spacer.gif" styleClass="wdgt-ftr-l-even"/>
  |                                             </f:facet>
  |                                     </ice:column>
  |                                     
  |                                     <ice:column>
  |                                             <f:facet name="header">
  |                                                     <ice:graphicImage 
url="img/spacer.gif" styleClass="wdgt-hdr-m"/>
  |                                             </f:facet>
  |                                             <ice:selectBooleanCheckbox 
value="#{slaBean.selected}"/>
  |                                             <f:facet name="footer">
  |                                                     <ice:graphicImage 
url="img/spacer.gif" styleClass="wdgt-ftr-m-even"/>
  |                                             </f:facet>
  |                                     </ice:column>
  | 
  |                                     <ice:column>
  |                                             <f:facet name="header">
  |                                                     <ice:commandLink 
action="#{slaManagerAction.sortByColumnAction}" 
  |                                                                             
   styleClass="widget-box-header-text">
  |                                                                             
   
  |                                                             
<ice:graphicImage rendered="#{slaManagerAction.sortBy == 'name'}"
  |                                                                             
                styleClass="#{(slaManagerAction.ascending == 'true') ? 
'wdgt-hdr-sort-up' : 'wdgt-hdr-sort-down'}"
  |                                                                             
                url="img/spacer.gif"/>
  |                                                             <ice:outputText 
value="Name"/>
  |                                                             <f:param 
name="sortColumn" value="name"/>                                                
                               
  |                                                             
  |                                                     </ice:commandLink>
  |                                             </f:facet>
  |                                             
  |                                             <!-- This command link was 
originally a s:link object, but for some reason the 
  |                                                - the JSF/ICEfaces/SEAM 
handling of s:link did now work correctly with the
  |                                                - SEAM @DataModel & 
@DataModelSelection in the slaManagerAction. Not sure 
  |                                                - what the problem is, but 
perhaps it will get fixed in the next version
  |                                                - after 1.1GA
  |                                                -
  |                                                - s:xxxx might be working as 
designed... See the following URL
  |                                                -
  |                                                -  
http://www.jboss.com/index.html?module=bb&op=viewtopic&t=95978
  |                                                -  
http://www.jboss.com/index.html?module=bb&op=viewtopic&t=98321
  |                                                -
  |                                              -->
  |                                             <ice:commandLink 
value="#{slaBean.serviceLevelAgreement.name}" 
  |                                                                             
 action="#{slaManagerAction.updateSLA}"/>
  |                                             
  |                                             <f:facet name="footer">
  |                                                     <h:graphicImage 
url="img/spacer.gif" styleClass="wdgt-ftr-m-even" />
  |                                             </f:facet>
  |                                     </ice:column>
  |     
  |                                     <ice:column>
  |                                             <f:facet name="header">
  |                                                     <ice:graphicImage 
url="img/spacer.gif" styleClass="wdgt-hdr-r" />
  |                                             </f:facet>
  |                                             <f:facet name="footer">
  |                                                     <ice:graphicImage 
url="img/spacer.gif" styleClass="wdgt-ftr-r-even" />
  |                                             </f:facet>
  |                                     </ice:column>
  |                             </ice:dataTable>
  | 

The relevant portions from the slaManagerAction

anonymous wrote : 
  |     @DataModel(value="slaBeanList")
  |     private List slaBeanList;
  |     
  |     @DataModelSelection(value="slaBeanList")
  |     private ServiceLevelAgreementBean selectedBean;
  |     
  |     @SuppressWarnings("unused")
  |     @Out(required=false, value="SLA")
  |     private ServiceLevelAgreement sla;
  | 
  |     @Begin(join=true)
  |     public String updateSLA()
  |     {
  |             logger.debug("#updateSLA()");
  |             logger.debug("SEAM.isConversationContextActive = {0}", 
Boolean.toString(Contexts.isConversationContextActive()));
  |             if (selectedBean == null)
  |             {
  |                     logger.error("No SLA selection was set via the SEAM 
data model selection, unable to push 'SLA' into context");
  |                     throw new IllegalStateException("No SLA was selected or 
set by the conversation manager");
  |             }
  |             sla = selectedBean.getServiceLevelAgreement();
  |             return "UpdateSLA";     // JSF Navigation, see 
WEB-INF/navigation.xml
  |     }
  | 
  | 

I also just verified that if I change the ice:commandLink to s:link in the 
XHTML it fails badly! Here is the stack trace showing the IllegalStateExceptoin 
generated from the updateSLA() method.

anonymous wrote : 
  | 2007-01-03 17:36:29,281 ERROR [org.jboss.seam.core.Exceptions] redirecting 
to debug page
  | javax.ejb.EJBException: java.lang.IllegalStateException: No SLA was 
selected or set by the conversation manager
  |     at 
org.jboss.ejb3.tx.Ejb3TxPolicy.handleExceptionInOurTx(Ejb3TxPolicy.java:69)
  |     at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:83)
  |     at 
org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:191)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.stateful.StatefulInstanceInterceptor.invoke(StatefulInstanceInterceptor.java:83)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:77)
  |     at 
org.jboss.ejb3.security.Ejb3AuthenticationInterceptor.invoke(Ejb3AuthenticationInterceptor.java:102)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:47)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.stateful.StatefulContainer.localInvoke(StatefulContainer.java:203)
  |     at 
org.jboss.ejb3.stateful.StatefulLocalProxy.invoke(StatefulLocalProxy.java:98)
  |     at $Proxy126.updateSLA(Unknown Source)
  |     at 
com.raritan.ccsd.action.sla.ServiceLevelAgreementManager$$FastClassByCGLIB$$54de4ff3.invoke()
  |     at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:149)
  |     at 
org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:45)
  |     at 
org.jboss.seam.intercept.ClientSideInterceptor$1.proceed(ClientSideInterceptor.java:73)
  |     at 
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:55)
  |     at 
org.jboss.seam.interceptors.RemoveInterceptor.removeIfNecessary(RemoveInterceptor.java:39)
  |     at sun.reflect.GeneratedMethodAccessor239.invoke(Unknown Source)
  |     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:18)
  |     at 
org.jboss.seam.intercept.Interceptor.aroundInvoke(Interceptor.java:169)
  |     at 
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:64)
  |     at 
org.jboss.seam.interceptors.ExceptionInterceptor.handleExceptions(ExceptionInterceptor.java:38)
  |     at sun.reflect.GeneratedMethodAccessor201.invoke(Unknown Source)
  |     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:18)
  |     at 
org.jboss.seam.intercept.Interceptor.aroundInvoke(Interceptor.java:169)
  |     at 
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:64)
  |     at 
org.jboss.seam.intercept.RootInterceptor.createSeamInvocationContext(RootInterceptor.java:144)
  |     at 
org.jboss.seam.intercept.RootInterceptor.invokeInContexts(RootInterceptor.java:129)
  |     at 
org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:102)
  |     at 
org.jboss.seam.intercept.ClientSideInterceptor.interceptInvocation(ClientSideInterceptor.java:82)
  |     at 
org.jboss.seam.intercept.ClientSideInterceptor.intercept(ClientSideInterceptor.java:51)
  |     at org.jboss.seam.intercept.Proxy$$EnhancerByCGLIB$$538b5327.updateSLA()
  |     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.apache.myfaces.el.MethodBindingImpl.invoke(MethodBindingImpl.java:129)
  |     at 
org.jboss.seam.actionparam.ActionParamBindingHelper.invokeTheExpression(ActionParamBindingHelper.java:59)
  |     at 
org.jboss.seam.actionparam.ActionParamMethodBinding.invoke(ActionParamMethodBinding.java:71)
  |     at org.jboss.seam.core.Expressions$2.invoke(Expressions.java:98)
  |     at org.jboss.seam.core.Pages.callAction(Pages.java:398)
  |     at 
org.jboss.seam.jsf.AbstractSeamPhaseListener.callPageActions(AbstractSeamPhaseListener.java:253)
  |     at 
org.jboss.seam.jsf.AbstractSeamPhaseListener.beforeRender(AbstractSeamPhaseListener.java:201)
  |     at 
org.jboss.seam.jsf.SeamPhaseListener.beforePhase(SeamPhaseListener.java:51)
  |     at 
org.apache.myfaces.lifecycle.PhaseListenerManager.informPhaseListenersBefore(PhaseListenerManager.java:70)
  |     at 
org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:373)
  |     at 
com.icesoft.faces.webapp.xmlhttp.PersistentFacesServlet.service(PersistentFacesServlet.java:394)
  |     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.jboss.seam.servlet.SeamExceptionFilter.doFilter(SeamExceptionFilter.java:46)
  |     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.jboss.web.tomcat.tc5.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:156)
  |     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.processConnection(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.IllegalStateException: No SLA was selected or set by 
the conversation manager
  |     at 
com.raritan.ccsd.action.sla.ServiceLevelAgreementAction.updateSLA(ServiceLevelAgreementAction.java:200)
  |     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.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:112)
  |     at 
org.jboss.ejb3.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:166)
  |     at 
org.jboss.seam.intercept.EJBInvocationContext.proceed(EJBInvocationContext.java:37)
  |     at 
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:55)
  |     at 
org.jboss.seam.interceptors.BijectionInterceptor.bijectTargetComponent(BijectionInterceptor.java:51)
  |     at sun.reflect.GeneratedMethodAccessor205.invoke(Unknown Source)
  |     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:18)
  |     at 
org.jboss.seam.intercept.Interceptor.aroundInvoke(Interceptor.java:169)
  |     at 
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:64)
  |     at 
org.jboss.seam.interceptors.OutcomeInterceptor.interceptOutcome(OutcomeInterceptor.java:23)
  |     at sun.reflect.GeneratedMethodAccessor204.invoke(Unknown Source)
  |     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:18)
  |     at 
org.jboss.seam.intercept.Interceptor.aroundInvoke(Interceptor.java:169)
  |     at 
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:64)
  |     at 
org.jboss.seam.interceptors.ConversationInterceptor.endOrBeginLongRunningConversation(ConversationInterceptor.java:51)
  |     at sun.reflect.GeneratedMethodAccessor203.invoke(Unknown Source)
  |     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:18)
  |     at 
org.jboss.seam.intercept.Interceptor.aroundInvoke(Interceptor.java:169)
  |     at 
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:64)
  |     at 
org.jboss.seam.interceptors.BusinessProcessInterceptor.manageBusinessProcessContext(BusinessProcessInterceptor.java:50)
  |     at sun.reflect.GeneratedMethodAccessor202.invoke(Unknown Source)
  |     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:18)
  |     at 
org.jboss.seam.intercept.Interceptor.aroundInvoke(Interceptor.java:169)
  |     at 
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:64)
  |     at 
com.raritan.ccsd.action.interceptor.LoggedInInterceptor.checkLoggedIn(LoggedInInterceptor.java:53)
  |     at sun.reflect.GeneratedMethodAccessor242.invoke(Unknown Source)
  |     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:18)
  |     at 
org.jboss.seam.intercept.Interceptor.aroundInvoke(Interceptor.java:169)
  |     at 
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:64)
  |     at 
org.jboss.seam.interceptors.ManagedEntityIdentityInterceptor.aroundInvoke(ManagedEntityIdentityInterceptor.java:39)
  |     at sun.reflect.GeneratedMethodAccessor241.invoke(Unknown Source)
  |     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:18)
  |     at 
org.jboss.seam.intercept.Interceptor.aroundInvoke(Interceptor.java:169)
  |     at 
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:64)
  |     at 
org.jboss.seam.intercept.RootInterceptor.createSeamInvocationContext(RootInterceptor.java:144)
  |     at 
org.jboss.seam.intercept.RootInterceptor.invokeInContexts(RootInterceptor.java:129)
  |     at 
org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:102)
  |     at 
org.jboss.seam.intercept.SessionBeanInterceptor.aroundInvoke(SessionBeanInterceptor.java:49)
  |     at sun.reflect.GeneratedMethodAccessor227.invoke(Unknown Source)
  |     at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |     at java.lang.reflect.Method.invoke(Method.java:585)
  |     at 
org.jboss.ejb3.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:118)
  |     at 
org.jboss.ejb3.interceptor.EJB3InterceptorsInterceptor.invoke(EJB3InterceptorsInterceptor.java:63)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.entity.ExtendedPersistenceContextPropagationInterceptor.invoke(ExtendedPersistenceContextPropagationInterceptor.java:57)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor.invoke(TransactionScopedEntityManagerInterceptor.java:54)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:46)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:79)
  |     ... 79 more
  | 2007-01-03 17:36:29,328 DEBUG [org.jboss.seam.core.Events] Processing 
event:org.jboss.seam.preSetVariable.org.jboss.seam.debug.lastException
  | 
  | 

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