I have reproduced the problem by creating an annotation type in Java sources and annotating it: @Deprecated public @interface MyAnnotation { } Please check if you have annotation types. If this is the case, try this workaround: move annotation types to a separate project, build a jar of it, and add the jar to the classpath of the main project. Seam builder will not fail if annotation types are in a jar. We will fix the issue ASAP. Max, shall we patch 3.0.0? View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4224283#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...