Max, The current seam-gen behaviour is unchanged and acts exactly the same way as before. The hack provides the following improvement: 1. Every seam project gets its own build.properties (currently stored in user home, can be changed to project itself) Why is this useful? As said in the google discussion group, now seam-gen can be stored in a shared server environment and all users can work with their own project without any conflicts. The command line switch "-Dproject.name" comes into play only when you want to run a particular project and the not the last project that seam-gen was configured for. (again mostly in shared environment, users need to use this switch to run their project and not someone else :) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4033513#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...