t:radio - (empty) Value is not a valid option

[Michael Heinen]

How can I set the value of a checkbox inside selectOneRadio to null or empty? <h:panelGroup> <t:selectOneRadio id="multiDraft" value="#{DynaAnnoControllerBean.multiAttributes['multiDraft']}"                           style="width:auto;" layout="spread">                         <f:selectItem itemLabel="yes" itemValue="bla1"/>                         <f:selectItem itemLabel="no" itemValue="bla2"/>                         <f:selectItem itemLabel="untouched" itemValue=""/>             </t:selectOneRadio>                                                <t:radio for="" index="0"/>             <t:radio for="" index="1"/>             <t:radio for="" index="2"/> </h:panelGroup>                                                                      I got the message "Value is not a valid option" when the 3rd option "untouched" is selected. How can I set this value to null / empty? <f:selectItem itemLabel="" itemValue=""/> inside a selectOneMenu is working well.   Michael