java.lang.NullPointerException

I have a very simple page with a datagrid and a link to add a line to the grid. Clicking on the link generates an exception:

 java.lang.NullPointerException
 	at com.sun.facelets.FaceletViewHandler.writeState(FaceletViewHandler.java:761)
 	at ecruiser.render.html.HTML_FormRenderer.encodeEnd(Unknown Source)
 	at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:539)
 	at ecruiser.advanced.datatable.render.html.HTML_BasicDataTableRenderer.encodeEnd(Unknown Source)
 	at ecruiser.advanced.datatable.render.html.HTML_DataTableRenderer.encodeEnd(Unknown Source)
 	at ecruiser.render.ECRenderer.ajaxEncode(Unknown Source)
 	at ecruiser.render.html.HTML_ElementRenderer.ajaxEncode(Unknown Source)
 	at ecruiser.advanced.datatable.render.html.HTML_DataTableRenderer.ajaxEncode(Unknown Source)
 	at ecruiser.advanced.datatable.render.html.HTML_GridTableRenderer.ajaxEncode(Unknown Source)
 	at ecruiser.ajax.AjaxPhaseListener.encodeRecursive(Unknown Source)
 	at ecruiser.ajax.AjaxPhaseListener.encodeRecursive(Unknown Source)
 	at ecruiser.ajax.AjaxPhaseListener.encodeComponent(Unknown Source)
 	at ecruiser.ajax.AjaxPhaseListener.ajaxResponse(Unknown Source)
 	at ecruiser.ajax.AjaxPhaseListener.afterPhase(Unknown Source)
 	at org.apache.myfaces.lifecycle.PhaseListenerManager.informPhaseListenersAfter(PhaseListenerManager.java:92)
 	at org.apache.myfaces.lifecycle.LifecycleImpl.executePhase(LifecycleImpl.java:99)
 	at org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:70)
 	at javax.faces.webapp.FacesServlet.service(FacesServlet.java:139)
 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)

Any ideas what I do wrong?

Thanks

Did you put the gridTable inside a <h:form> tag?

Yes .. that was it. Thanks.

So it mean that we have to put the gridTable inside a <h:form> tag when using Facelets ?

Yes, that's right.


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