If you reference a named bundle inside a <ui:define>, the bundle must be declared with <f:loadBundle> in one of two places:

1. in the template itself or

2. in the template client *inside* the <ui:define> region where it is referenced

 

If you use one of the tags that iterates over rows like h:dataTable and t:tree2, the name you choose for the var="iterator_name" attribute must be unique in the request. The reason is that these tags store data for each iteration in the request variable map.