I have an entity Person that has a ManyToMany relation to other Persons ("friends" ;)). When editing one person there's a SelectManyMenu showing all Persons and you can select or deselect friends. The SelectManyMenu has a Converter (... converter="#{personConverter}"), of course. This one is implemented as a Stateless Session Bean with @Name("personConverter") and the two methods getAsString(...) and getAsObject(...). The persons are filled into that List by <f:selectItems value="#{personListe.selectItems}" />. You guess it, the selectItems() method returns a List, which's items are all added like this: ...add(new SelectItem(aPerson.getId(), aPerson.getName())); So far so good. Should be nothing special here ;). When going to the edit page everything works fine, and the Log shows me that the getAsString-method is called for every Person in the list. BUT: As soon as a safe the edited person (and it doesn't play a role whether I select friends or not) there's an Exception: FATAL [org.apache.myfaces.renderkit.html.HtmlRepsonseStateManager] Cannot decode Object from Base64 String | java.lang.ClassNotFoundException: No ClassLoaders found for: de.beffo.test.converter.PersonConverter | at org.jboss.mx.loading.LoadMgr3.beginLoadTask(LoadMgr3.java:212) | at ... Well... how can it be that the Converter is found when the page is displayed, and not found right after submitting? Anyone having experience with such a behaviour? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3960961#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...