There is definitely an issue with EJB vararg methods in Weblogic 10 (see stack trace below). Since Seam has quite a few vararg methods then it means that you can't deploy a full JSF->Seam->EJB3.0 application on Weblogic 10 yet. An error occurred during activation of changes, please see the log for details. Exception preparing module: EJBModule(jboss-seam.jar) Unable to deploy EJB: jboss-seam.jar from jboss-seam.jar: There are 1 nested errors: java.io.IOException: Compiler failed executable.exec: /checkpoint/weblogic10/wlserver_10.0/samples/domains/wl_server/servers/examplesServer/cache/EJBCompilerCache/-1fp2y4mbf7ax/org/jboss/seam/core/Dispatcher_u7njda_Intf.java:20: modifier transient not allowed here public transient javax.ejb.Timer scheduleEvent(java.lang.String arg0, java.lang.Long arg1, java.util.Date arg2, java.lang.Long arg3, java.lang.Object[] arg4); ^ /checkpoint/weblogic10/wlserver_10.0/samples/domains/wl_server/servers/examplesServer/cache/EJBCompilerCache/-1fp2y4mbf7ax/org/jboss/seam/core/TransactionListener_r4jqkg_LocalTransactionListenerImpl.java:109: modifier transient not allowed here public transient void scheduleEvent(java.lang.String arg0, java.lang.Object[] arg1) ^ /checkpoint/weblogic10/wlserver_10.0/samples/domains/wl_server/servers/examplesServer/cache/EJBCompilerCache/-1fp2y4mbf7ax/org/jboss/seam/core/TransactionListener_r4jqkg_Intf.java:23: modifier transient not allowed here public transient void scheduleEvent(java.lang.String arg0, java.lang.Object[] arg1); View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4085812#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...