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java.lang.NullPointerException: 	at javax.faces.event.MethodExpressionActionListener.processAction(MethodExpressionActionListener.java:87)	at javax.faces.event.ActionEvent.processListener(ActionEvent.java:77)	at javax.faces.component.UIComponentBase.broadcast(UIComponentBase.java:776)	at javax.faces.component.UICommand.broadcast(UICommand.java:368)	at com.icesoft.faces.component.inputfile.InputFile.broadcast(InputFile.java:150)	at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:450)	at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:759)	at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:97)	at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251)	at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:117)	at com.icesoft.faces.webapp.xmlhttp.PersistentFacesState.execute(PersistentFacesState.java:279)	at com.icesoft.faces.webapp.xmlhttp.PersistentFacesState.executeAndRender(PersistentFacesState.java:300)	at com.icesoft.faces.webapp.xmlhttp.PersistentFacesState.setupAndExecuteAndRender(PersistentFacesState.java:312)	at com.icesoft.faces.webapp.xmlhttp.PersistentFacesState$RenderRunner.run(PersistentFacesState.java:431)	at edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:665)	at edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:690)	at java.lang.Thread.run(Thread.java:595)