Ahh, we're using it differently. I'm following the seam examples, where the upload componet sets the value to a bean variable that is a byte []. For instance this is from my backing bean (with the obvious getters/setters left out): | private String uploadFileName; | private byte [] uploadFile; | and here's what the facelets page looks like: | <s:fileUpload id="feed" data="#{feedMapping.uploadFile}" fileName="#{feedMapping.uploadFileName}"/> | That plus the null check from my previous post works well for me, and I don't get the nullpointer you're seeing. Does that help? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4026447#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...