Hi Claudio. Maybe I was not clear enough, I'm not sure you have tried my solution, so here is an example: Create a wrapper class, let's say Documentos: | public class Documentos { | @XmlMimeType("application/octet-stream") | private String dummy; | | private List<DocumentoData> documentos; | } | It should work, the trick is the annotation in the dummy string, simply put the field, you don't need to use it Btw, I will upload a patch later, and I will test a case similar to yours, so I expect this problem to be fixed on jbossws 2.0.4 . Regards, Martin View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4131721#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...