Hello. I have been tasked with upgrading our AS from jboss-4.0.3SP1 to jboss-4.0.5.GA, and our portal from 2.2.1-SP3 to 2.4.1. Both the AS and portal where downloaded and unzipped manually. My JDBC driver, jboss-portal.sar, and portal-hsqldb-ds.xml have been copied to the /server/default/lib. At the moment I am only working with the hypersonic database. Almost everything works at this point. In addition to migrating my portlet descriptors I have been bringing our layout into compliance with JBoss standards - in the past we were not using many portlet styles and had no controls in the title bar. I have my portlet decorations and contols rendering correctly in my portlet title now and all of the controls work except for maximizing a portlet. The exception: anonymous wrote : javax.servlet.ServletException: No null layout allowed here | org.jboss.portal.server.servlet.PortalServlet.process(PortalServlet.java:315) | org.jboss.portal.server.servlet.PortalServlet.doGet(PortalServlet.java:173) | javax.servlet.http.HttpServlet.service(HttpServlet.java:697) | javax.servlet.http.HttpServlet.service(HttpServlet.java:810) | org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96) | | root cause | | java.lang.IllegalArgumentException: No null layout allowed here | org.jboss.portal.theme.LayoutDispatcher.(LayoutDispatcher.java:87) | org.jboss.portal.theme.impl.JSPLayout.assembleResponse(JSPLayout.java:54) | org.jboss.portal.core.command.MarkupCommand.execute(MarkupCommand.java:363) | org.jboss.portal.core.command.ControllerCommand.dispatch(ControllerCommand.java:84) | ... *snip* | I have searched the forums and found a thread or two concerning this exception where the solution seemingly had to do with the database connectivity. Since my entire portal is working except maximizing, I'm inclined to say I have a different problem. That said, we've never tried maximizing our portlets before so it could be some old mistake made before I started. Any thoughts? Thanks in advance. Nollie View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4028423#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...