> “personBean.levels.isEmpty”
Yes, it’s empty an in the form the first time rendered all the options are unchecked. > > You should use "name" instead of "key" Why not key? i have the correspondan property files personBean.levels=Cursos I also see the label Cursos and the options The problem is about the XML validation. <field name=“personBean.levels”> <field-validator type=“fieldexpression> <param-name=“expression”>[!CDATA[#personBean.levels.length==0]]>></param> <message>You must select at least one option</message> </field-validator> </field> It is always trigger Un saludo, José A.