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java.lang.NullPointerException: 	at org.jivesoftware.messenger.handler.IQLastActivityHandler.handleIQ(	at org.jivesoftware.messenger.handler.IQHandler.process(	at org.jivesoftware.messenger.IQRouter.handle(	at org.jivesoftware.messenger.IQRouter.route(	at org.jivesoftware.messenger.PacketRouter.route(	at	at	at	at	at