rich:dataTable Attribute sortMode invalid for tag dataTable

[padrew]

I'm seeing the following exception:

ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[localhost].[/].[jsp]] Servlet.service() for servlet jsp threw exception
org.apache.jasper.JasperException: /people/person_search/standard_search.jsp(103,17) Attribute sortMode invalid for tag dataTable according to TLD

This is the dataTable in question:

<rich:dataTable sortMode="single" id="person_search" value="#{PersonBean.results}" var="person" rows="#{PersonBean.rows}" binding="#{PersonBean.dataTable}" rowClasses="rowOver, alt rowOver" onRowMouseOver="this.style.backgroundColor='#F1F1F1'" onRowMouseOut="this.style.backgroundColor='#{a4jSkin.tableBackgroundColor}'">

I'm using the following RichFaces jars:

richfaces-api-3.1.6.GA.jar
richfaces-impl-3.1.6.GA.jar
richfaces-ui-3.1.6.GA.jar

jsp runs fine without sortMode attribute

[ilya_shaikovsky]

this functionality not present in 3.1.x branch,

[padrew]

Thanks. I changed to the

richfaces-api-3.3.1.GA.jar
richfaces-impl-3.3.1.GA.jar
richfaces-ui-3.3.1.GA.jar

it forced me to change the following:

String regionId = ajaxContext.getSubmittedRegionClientId(facesContext);

to

String regionId = ajaxContext.getSubmittedRegionClientId();

and now I get the following Exception:

ERROR [org.apache.myfaces.lifecycle.PhaseListenerManager] Exception in PhaseListener RESTORE_VIEW(1) afterPhase
java.lang.NullPointerException

[ilya_shaikovsky]

please add more code both bean and page in order to understand where you need it and how using.