You are correct, and I did use a selectManyMenu, I mistakenly posted the code, containing a selectOneMenu. Nevertheless, the problem is that the tag is having a problem with the "states" collection referenced by companyHome.instance.states, it appears to want an Array but, seam-gen produced a Set. I tried converting the Set to an Array and it still didn't work. Any ideas? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4029329#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...