Hi, I am getting the following exceptions when running the seamdiscs example on JBoss AS 4.2.0 GA. What I did are: 1. Download and install JBoss AS 4.2.0 GA; 2. Check out the jboss-seam module from CVS; 3. Run ant under the project folder; 4. Run ant under jboss-seam\trinidad; 5. Modify build.properties under jboss-seam\trinidad\example\seamdiscs to point to the correct location of JBoss AS 4.2; 6. Run ant under jboss-seam\trinidad\example\seamdiscs; Thanks, Tong javax.servlet.ServletException: java.lang.IllegalArgumentException: Stack must not be null | org.jboss.seam.web.ExceptionFilter.endWebRequestAfterException(ExceptionFilter.java:97) | org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:66) | org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:56) | org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:81) | org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:56) | org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:47) | org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:56) | org.ajax4jsf.framework.ajax.xmlfilter.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:127) | org.ajax4jsf.framework.ajax.xmlfilter.BaseFilter.doFilter(BaseFilter.java:277) | org.jboss.seam.web.AbstractAjax4jsfFilter.doFilter(AbstractAjax4jsfFilter.java:35) | org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:56) | org.jboss.seam.web.SeamFilter.doFilter(SeamFilter.java:127) | org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96) | | root cause | | java.lang.IllegalArgumentException: Stack must not be null | org.jboss.seam.core.ConversationEntry.<init>(ConversationEntry.java:40) | org.jboss.seam.core.ConversationEntries.createConversationEntry(ConversationEntries.java:52) | org.jboss.seam.core.Manager.createConversationEntry(Manager.java:685) | org.jboss.seam.core.Manager.beforeRedirect(Manager.java:834) | org.jboss.seam.core.Manager.beforeRedirect(Manager.java:852) | org.jboss.seam.exceptions.DebugPageHandler.handle(DebugPageHandler.java:24) | org.jboss.seam.core.Exceptions.handle(Exceptions.java:78) | org.jboss.seam.web.ExceptionFilter.endWebRequestAfterException(ExceptionFilter.java:85) | org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:66) | org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:56) | org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:81) | org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:56) | org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:47) | org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:56) | org.ajax4jsf.framework.ajax.xmlfilter.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:127) | org.ajax4jsf.framework.ajax.xmlfilter.BaseFilter.doFilter(BaseFilter.java:277) | org.jboss.seam.web.AbstractAjax4jsfFilter.doFilter(AbstractAjax4jsfFilter.java:35) | org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:56) | org.jboss.seam.web.SeamFilter.doFilter(SeamFilter.java:127) | org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96) | View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4053205#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...