JSF 2.0 How to display a different h:panelGroup each time an item is selected from a selectOneMenu

Question

I have a selectOneMenu that displays some different stuff categories:

Answer 1

sourceId=null[severity=(ERROR 2), summary=(One or more resources have the target of 'head', but no 'head' component has been defined within the view.), detail=(One or more resources have the target of 'head', but no 'head' component has been defined within the view.)]

Check your head tag , you may have missed the h prefix , write h:head , I solved the problem by using the prefix h.