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java.lang.UnsupportedOperationException: 	at java.util.AbstractList.remove(AbstractList.java:172)	at java.util.AbstractList$Itr.remove(AbstractList.java:437)	at java.util.AbstractList.removeRange(AbstractList.java:662)	at java.util.AbstractList.clear(AbstractList.java:258)	at com.icesoft.faces.component.panelpositioned.PanelPositionedRenderer.decode(PanelPositionedRenderer.java:337)	at javax.faces.component.UIComponentBase.decode(UIComponentBase.java:500)	at com.icesoft.faces.component.panelseries.UISeries.processDecodes(UISeries.java:263)	at javax.faces.component.UIForm.processDecodes(UIForm.java:53)	at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:602)	at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:602)	at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:602)	at javax.faces.component.UIViewRoot.processDecodes(UIViewRoot.java:135)	at org.apache.myfaces.lifecycle.LifecycleImpl.applyRequestValues(LifecycleImpl.java:219)	at org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:71)	at com.icesoft.faces.webapp.xmlhttp.BlockingServlet.renderCycle(BlockingServlet.java:410)	at com.icesoft.faces.webapp.xmlhttp.BlockingServlet.receiveUpdates(BlockingServlet.java:398)	at com.icesoft.faces.webapp.xmlhttp.BlockingServlet.service(BlockingServlet.java:264)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)	at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)	at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)	at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)	at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)	at java.lang.Thread.run(Thread.java:595)