Hey, First experience with JSF and Seam so I might be completely out of scope here. I have a NullpointerException in the restoreState method of UILineChart (method param State is null). I don't know why State is null but I guess that the saveState method of UILineChart should save his parent state in Values[0]. thanks regards, Nicolas Germeau View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4095307#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...