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java.lang.NullPointerException: 	at java.io.File.(File.java:194)	at com.icesoft.faces.component.dataexporter.DataExporterRenderer.createFile(DataExporterRenderer.java:137)	at com.icesoft.faces.component.dataexporter.DataExporterRenderer.encodeBegin(DataExporterRenderer.java:42)	at javax.faces.component.UIComponentBase.encodeBegin(UIComponentBase.java:703)	at com.icesoft.faces.renderkit.dom_html_basic.DomBasicRenderer.encodeParentAndChildren(DomBasicRenderer.java:350)	at com.icesoft.faces.renderkit.dom_html_basic.GroupRenderer.encodeChildren(GroupRenderer.java:96)	at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:721)	at com.icesoft.faces.renderkit.dom_html_basic.DomBasicRenderer.encodeParentAndChildren(DomBasicRenderer.java:352)	at com.icesoft.faces.renderkit.dom_html_basic.GroupRenderer.encodeChildren(GroupRenderer.java:96)	at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:721)	at com.icesoft.faces.renderkit.dom_html_basic.DomBasicRenderer.encodeParentAndChildren(DomBasicRenderer.java:352)	at com.icesoft.faces.renderkit.dom_html_basic.GroupRenderer.encodeChildren(GroupRenderer.java:96)	at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:721)	at com.icesoft.faces.renderkit.dom_html_basic.DomBasicRenderer.encodeParentAndChildren(DomBasicRenderer.java:352)	at com.icesoft.faces.renderkit.dom_html_basic.DomBasicRenderer.encodeParentAndChildren(DomBasicRenderer.java:359)	at com.icesoft.faces.renderkit.dom_html_basic.GroupRenderer.encodeChildren(GroupRenderer.java:96)	at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:721)	at com.icesoft.faces.component.util.CustomComponentUtils.renderChild(CustomComponentUtils.java:339)	at com.icesoft.faces.component.panelstack.PanelStackRenderer.encodeChildren(PanelStackRenderer.java:116)	at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:721)	at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:552)	at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:557)	at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:557)	at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:557)	at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:557)	at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:557)	at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:557)	at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:557)	at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:557)	at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:505)	at com.icesoft.faces.application.D2DViewHandler.renderView(D2DViewHandler.java:154)	at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:107)	at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:245)	at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:137)	at com.icesoft.faces.webapp.http.core.JsfLifecycleExecutor.apply(JsfLifecycleExecutor.java:17)	at com.icesoft.faces.webapp.http.core.ReceiveSendUpdates.renderCycle(ReceiveSendUpdates.java:140)	at com.icesoft.faces.webapp.http.core.ReceiveSendUpdates.service(ReceiveSendUpdates.java:68)	at com.icesoft.faces.webapp.http.core.RequestVerifier.service(RequestVerifier.java:26)	at com.icesoft.faces.webapp.http.common.standard.PathDispatcherServer.service(PathDispatcherServer.java:24)	at com.icesoft.faces.webapp.http.servlet.MainSessionBoundServlet.service(MainSessionBoundServlet.java:160)	at com.icesoft.faces.webapp.http.servlet.SessionDispatcher$1.service(SessionDispatcher.java:30)	at com.icesoft.faces.webapp.http.servlet.ThreadBlockingAdaptingServlet.service(ThreadBlockingAdaptingServlet.java:19)	at com.icesoft.faces.webapp.http.servlet.EnvironmentAdaptingServlet.service(EnvironmentAdaptingServlet.java:63)	at com.icesoft.faces.webapp.http.servlet.SessionDispatcher.service(SessionDispatcher.java:50)	at com.icesoft.faces.webapp.http.servlet.SessionVerifier.service(SessionVerifier.java:22)	at com.icesoft.faces.webapp.http.servlet.PathDispatcher.service(PathDispatcher.java:23)	at com.icesoft.faces.webapp.http.servlet.MainServlet.service(MainServlet.java:95)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)	at com.icesoft.faces.webapp.xmlhttp.BlockingServlet.service(BlockingServlet.java:56)	at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:225)	at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:127)	at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:283)	at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:175)	at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3214)	at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)	at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)	at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:1983)	at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:1890)	at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1344)	at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209)	at weblogic.work.ExecuteThread.run(ExecuteThread.java:181)