Oops I am returning arrays actually This is the error: | sourceId=j_id19:j_id32[severity=(ERROR 2), summary=(Conversion Error setting value 'PP EP EX TOX' for '#{chemical.equipment}'. ), detail=(Conversion Error setting value 'PP EP EX TOX' for '#{chemical.equipment}'. )] | relevant xhtml | <h:selectManyCheckbox value="#{chemical.equipment}"> | <s:selectItems value="#{enumLists.equipment}" var="item" label="#{item}"/> | <s:convertEnum /> | </h:selectManyCheckbox> | chemical.equipment is a set of enum eg (a Set of Enum Equipment). enumLists.equipement is an array of the values of Equipment View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4100735#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...