selectOneListbox - does not contain Objects of type SelectItem?!?

[Jeffrey Porter <PO...@WMGMAIL.wmg.warwick.ac.uk>]

 
Hello all again,
 
I presume that I'm having another blonde moment (a moment of stupidity).
I'm getting the following exception, but I can't see why.
 
I'm giving it an ArrayList of SelectItem objects, but still it fails.
 
Anyone got any ideas?
 
Thanks again
Jeff.
 
 
 
javax.servlet.ServletException: Collection referenced by UISelectItems
with binding '#{myObject.subCategories}' and Component-Path :
{Component-Path : [Class: javax.faces.component.UIViewRoot,ViewId:
/attachPIR.jsp][Class: javax.faces.component.html.HtmlPanelGroup,Id:
body][Class: javax.faces.component.html.HtmlForm,Id: _id0][Class:
javax.faces.component.html.HtmlSelectOneListbox,Id: _id80][Class:
javax.faces.component.UISelectItems,Id: _id81]} does not contain Objects
of type SelectItem
        javax.faces.webapp.FacesServlet.service(FacesServlet.java:109)
 
org.apache.myfaces.component.html.util.ExtensionsFilter.doFilter(Extensi
onsFilter.java:122)
 
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilte
r.java:81)

 

 

JSP...

<h:selectOneListbox value="#{myObject.subCategory}" >

<f:selectItems value="#{myObject.subCategories}"/>

</h:selectOneListbox>
 
 
CODE...
import javax.faces.model.SelectItem;
    public List getSubCategories() {
        subCategories = new ArrayList();
        SelectItem item = new SelectItem("subcategory");
        subCategories.add(item);
        
        return subCategories;
    }