Hi Ramazan, Thank you for your quick reply. I reviewed the postanonymous wrote : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4051500#4051500 I already removed conversation-is-long-running-parameter from core:manager in components.xml. I think the problem probably resulted from ICEfaces, since icefaces\core\src\com\icesoft\util\SeamUtilities.java(322) has the code of seamManagerClass.getMethod("getConversationIsLongRunningParameter". I will post the problem on ICEfaces forum. Thanks.
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