Hello! I am also experiencing problems with <s:entityconverter /> and a set as a backing bean. Lists work, Sets do not. I remember a similar bug report which was closed by Pete Muir. He said the limitations of using a selectMany with a set was actually a limitation of the jsf specification. (http://jira.jboss.com/jira/browse/JBSEAM-1152) At the end of that issue he posted a link to the jsf RI docs http://java.sun.com/javaee/javaserverfaces/1.2/docs/api/javax/faces/compo... My reading of the documentation would be that you can not use a set UNLESS you specified a converter which would be fine for me. Is that correct? The obvious work around of using lists instead of sets is not possible for me because of the "cannot fetch multiple bags" problems. It would be great if someone could tell me if it is possible and where to start to get this working. If this is a real limitation of the jsf specification please close 1302 as a duplicate of 1152. Regards Felix P.S.: Using entityConverter I always get the error message | com.sun.facelets.tag.MetaRulesetImpl finish | SCHWERWIEGEND: /benutzer/edit.xhtml @53,77 entityClass="my.example.clazz" Unhandled by MetaTagHandler for type org.jboss.seam.ui.EntityConverter | Might this be related? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4046671#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...