Hi Claudio. Well, I've tested a case very similar to yours, in the same versions (JBoss 4.2.2 with the default JBossWS: 2.0.1 SP2) I've changed one thing from my previous suggestion, annotate the dummy field with @XmlAttachmentRef: | public class DocumentsSet { | @XmlAttachmentRef | String dummy; | | @XmlElement(name="Documents") | List<Document> documents; | } | The Document class is very similar: | public class Document { | public Document() { | } | | public Document(String name, String fileUrl) { | this.name = name; | try { | this.data = new DataHandler(new URL(fileUrl)); | } catch (MalformedURLException exc) { | exc.printStackTrace(); | } | } | | String name; | | @XmlAttachmentRef | DataHandler data; | } | And it works here, I see a multipart message as the response, I'm using soapUI to invoke it and I can see the attachments in the result also. So, I believe it should work for you. Regards, Martin View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4131787#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...