Hi

i have a comboBox that i want to populate from my Bean but i got a weird exception andcombo i cannot figure what to fix.

here is the comboBox :

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<a4j:outputPanel layout="block">

        <h:outputLabel value="Categorie :" />

              <rich:comboBox defaultLabel="Categorie" >

                    <f:selectItems value="#{ValeursMBean.valeursOptions}"/>

              </rich:comboBox>

</a4j:outputPanel>

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here is my Bean :

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package cdvm.surv.web;

import java.io.Serializable;

import java.util.ArrayList;

import java.util.Iterator;

import java.util.List;

import javax.annotation.PostConstruct;

import javax.faces.model.SelectItem;

import org.richfaces.component.html.HtmlScrollableDataTable;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.context.annotation.Scope;

import org.springframework.stereotype.Component;

import cdvm.surv.model.ValeurRef;

import cdvm.surv.service.ValeurRefService;

@Component("valeursMBean")

@Scope("session")

public class ValeursMBean implements Serializable {

    @Autowired

    private transient ValeurRefService valeurefService;

    private transient HtmlScrollableDataTable valeurTable;

    private ArrayList<String> valcategories = new ArrayList<String>();

    private List<SelectItem> valeursOptions = new ArrayList<SelectItem>();

    private ArrayList<ValeurRef> valeurs = new ArrayList<ValeurRef>();

    private List<ValeurRef> valeurefList;

    private ValeurRef currentvaleur;

public ValeursMBean(){

        valeursOptions.clear();

        for (ValeurRef val: valeurs) {     

               valeursOptions.add(new SelectItem(val.getCategorie()));           

        }

        valcategories.clear();

        for (ValeurRef val: valeurs) {

            valcategories.add(val.getCategorie())

       }

   }

    @PostConstruct

    public void init(){

        valeurefList = valeurefService.find();

        currentvaleur=new ValeurRef();  // vider currentvaleur

    }

    public void update(){

        valeurefService.save(currentvaleur);

        init();

        }      

    public void delete(){

        valeurefService.delete(currentvaleur);

        init();

    }

    // Getter and Setter...

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but i get this error :

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java.lang.IllegalArgumentException: Value  of tag <selectItems> attribute is incorrect.

org.ajax4jsf.util.SelectUtils.getSelectItems(SelectUtils.java:101)

org.richfaces.renderkit.ComboBoxBaseRenderer.getItems(ComboBoxBaseRenderer.java:95)

org.richfaces.renderkit.html.ComboBoxRenderer.doEncodeEnd(ComboBoxRenderer.java:578)

org.richfaces.renderkit.html.ComboBoxRenderer.doEncodeEnd(ComboBoxRenderer.java:626)

org.ajax4jsf.renderkit.RendererBase.encodeEnd(RendererBase.java:134)

javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:848)

org.ajax4jsf.renderkit.RendererBase.renderChild(RendererBase.java:281)

org.ajax4jsf.renderkit.RendererBase.renderChildren(RendererBase.java:258)

org.ajax4jsf.renderkit.html.AjaxOutputPanelRenderer.encodeChildren(AjaxOutputPanelRenderer.java:78)

javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:828)

com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeRecursive(HtmlBasicRenderer.java:271)

com.sun.faces.renderkit.html_basic.GridRenderer.encodeChildren(GridRenderer.java:242)

javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:828)

javax.faces.component.UIComponent.encodeAll(UIComponent.java:883)

javax.faces.render.Renderer.encodeChildren(Renderer.java:137)

javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:828)

javax.faces.component.UIComponent.encodeAll(UIComponent.java:883)

javax.faces.component.UIComponent.encodeAll(UIComponent.java:889)

com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:592)

org.ajax4jsf.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:100)

org.ajax4jsf.application.AjaxViewHandler.renderView(AjaxViewHandler.java:176)

com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:106)

com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251)

com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:144)

javax.faces.webapp.FacesServlet.service(FacesServlet.java:245)

org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:206)

org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290)

org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:388)

org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:515)

i'll be thankful for any kind of suggestions.