java.lang.NullPointerException: This exception has no message.

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Thrown when an application is trying to use or access an object whose reference equals to null. You are probably trying to use a reference that points to no location in memory as though it were referencing an object.

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java.lang.NullPointerException:
at java.util.Hashtable.put(Hashtable.java:514)
at oracle.apps.fnd.common.DBPreferenceStore.load(DBPreferenceStore.java:162)
at oracle.apps.fnd.wf.worklist.webui.NtfWorklistCO.processRequest(NtfWorklistCO.java:185)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:604)
at oracle.apps.fnd.framework.webui.OAWebBeanTableHelper.processRequest(OAWebBeanTableHelper.java:2144)
at oracle.apps.fnd.framework.webui.beans.table.OATableBean.processRequest(OATableBean.java:1035)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:976)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:943)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:663)
at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:252)
at oracle.apps.fnd.framework.webui.beans.layout.OAStackLayoutBean.processRequest(OAStackLayoutBean.java:350)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:976)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:943)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:663)
at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:252)
at oracle.apps.fnd.framework.webui.beans.layout.OAStackLayoutBean.processRequest(OAStackLayoutBean.java:350)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:976)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:943)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:663)
at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:252)
at oracle.apps.fnd.framework.webui.beans.layout.OAStackLayoutBean.processRequest(OAStackLayoutBean.java:350)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:976)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:943)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:663)
at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:252)
at oracle.apps.fnd.framework.webui.beans.layout.OAHeaderBean.processRequest(OAHeaderBean.java:391)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:976)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:943)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:663)
at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:252)
at oracle.apps.fnd.framework.webui.beans.layout.OACellFormatBean.processRequest(OACellFormatBean.java:411)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:976)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:943)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:663)
at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:252)
at oracle.apps.fnd.framework.webui.beans.layout.OARowLayoutBean.processRequest(OARowLayoutBean.java:347)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:976)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:943)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:663)
at oracle.apps.fnd.framework.webui.OAFlexibleContentHelper.processRequest(OAFlexibleContentHelper.java:504)
at oracle.apps.fnd.framework.webui.beans.OAFlexibleContentBean.processRequest(OAFlexibleContentBean.java:356)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:976)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:943)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:663)
at oracle.apps.fnd.framework.webui.beans.layout.OAFlexibleCellLayoutBean.processRequest(OAFlexibleCellLayoutBean.java:359)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:976)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:943)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:663)
at oracle.apps.fnd.framework.webui.beans.layout.OAFlexibleRowLayoutBean.processRequest(OAFlexibleRowLayoutBean.java:358)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:976)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:943)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:663)
at oracle.apps.fnd.framework.webui.beans.layout.OAFlexibleCellLayoutBean.processRequest(OAFlexibleCellLayoutBean.java:359)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:976)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:943)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:663)
at oracle.apps.fnd.framework.webui.beans.layout.OAFlexibleRowLayoutBean.processRequest(OAFlexibleRowLayoutBean.java:358)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:976)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:943)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:663)
at oracle.apps.fnd.framework.webui.beans.layout.OAFlexibleLayoutBean.processRequest(OAFlexibleLayoutBean.java:357)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:976)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:943)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:663)
at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:252)
at oracle.apps.fnd.framework.webui.beans.layout.OAStackLayoutBean.processRequest(OAStackLayoutBean.java:350)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:976)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:943)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:663)
at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:252)
at oracle.apps.fnd.framework.webui.OAPageLayoutHelper.processRequest(OAPageLayoutHelper.java:1183)
at oracle.apps.fnd.framework.webui.beans.layout.OAPageLayoutBean.processRequest(OAPageLayoutBean.java:1569)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:976)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:943)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:663)
at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:252)
at oracle.apps.fnd.framework.webui.beans.form.OAFormBean.processRequest(OAFormBean.java:385)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:976)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:943)
at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:663)
at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:252)
at oracle.apps.fnd.framework.webui.beans.OABodyBean.processRequest(OABodyBean.java:353)
at oracle.apps.fnd.framework.webui.OAPageBean.processRequest(OAPageBean.java:2630)
at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:1950)
at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:550)
at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:438)
at undefined._OA._jspService(_OA.java:212)
at com.orionserver.http.OrionHttpJspPage.service(OrionHttpJspPage.java:59)
at oracle.jsp.runtimev2.JspPageTable.service(JspPageTable.java:390)
at oracle.jsp.runtimev2.JspServlet.internalService(JspServlet.java:594)
at oracle.jsp.runtimev2.JspServlet.service(JspServlet.java:518)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:734)
at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:391)
at com.evermind.server.http.ServletRequestDispatcher.unprivileged_forward(ServletRequestDispatcher.java:280)
at com.evermind.server.http.ServletRequestDispatcher.access$100(ServletRequestDispatcher.java:68)
at com.evermind.server.http.ServletRequestDispatcher$2.oc4jRun(ServletRequestDispatcher.java:214)
at oracle.oc4j.security.OC4JSecurity.doPrivileged(OC4JSecurity.java:284)
at com.evermind.server.http.ServletRequestDispatcher.forward(ServletRequestDispatcher.java:219)
at com.evermind.server.http.EvermindPageContext.forward(EvermindPageContext.java:395)
at undefined._OA._jspService(_OA.java:221)
at com.orionserver.http.OrionHttpJspPage.service(OrionHttpJspPage.java:59)
at oracle.jsp.runtimev2.JspPageTable.service(JspPageTable.java:390)
at oracle.jsp.runtimev2.JspServlet.internalService(JspServlet.java:594)
at oracle.jsp.runtimev2.JspServlet.service(JspServlet.java:518)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:734)
at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:391)
at com.evermind.server.http.ServletRequestDispatcher.unprivileged_forward(ServletRequestDispatcher.java:280)
at com.evermind.server.http.ServletRequestDispatcher.access$100(ServletRequestDispatcher.java:68)
at com.evermind.server.http.ServletRequestDispatcher$2.oc4jRun(ServletRequestDispatcher.java:214)
at oracle.oc4j.security.OC4JSecurity.doPrivileged(OC4JSecurity.java:284)
at com.evermind.server.http.ServletRequestDispatcher.forward(ServletRequestDispatcher.java:219)
at com.evermind.server.http.EvermindPageContext.forward(EvermindPageContext.java:395)
at undefined._OA._jspService(_OA.java:221)
at com.orionserver.http.OrionHttpJspPage.service(OrionHttpJspPage.java:59)
at oracle.jsp.runtimev2.JspPageTable.service(JspPageTable.java:390)
at oracle.jsp.runtimev2.JspServlet.internalService(JspServlet.java:594)
at oracle.jsp.runtimev2.JspServlet.service(JspServlet.java:518)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:734)
at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:391)
at com.evermind.server.http.ServletRequestDispatcher.unprivileged_forward(ServletRequestDispatcher.java:280)
at com.evermind.server.http.ServletRequestDispatcher.access$100(ServletRequestDispatcher.java:68)
at com.evermind.server.http.ServletRequestDispatcher$2.oc4jRun(ServletRequestDispatcher.java:214)
at oracle.oc4j.security.OC4JSecurity.doPrivileged(OC4JSecurity.java:284)
at com.evermind.server.http.ServletRequestDispatcher.forward(ServletRequestDispatcher.java:219)
at com.evermind.server.http.EvermindPageContext.forward(EvermindPageContext.java:395)
at undefined._OA._jspService(_OA.java:221)
at com.orionserver.http.OrionHttpJspPage.service(OrionHttpJspPage.java:59)
at oracle.jsp.runtimev2.JspPageTable.service(JspPageTable.java:390)
at oracle.jsp.runtimev2.JspServlet.internalService(JspServlet.java:594)
at oracle.jsp.runtimev2.JspServlet.service(JspServlet.java:518)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
at com.evermind.server.http.ResourceFilterChain.doFilter(ResourceFilterChain.java:64)
at oracle.apps.jtf.base.session.ReleaseResFilter.doFilter(ReleaseResFilter.java:26)
at com.evermind.server.http.EvermindFilterChain.doFilter(EvermindFilterChain.java:15)
at oracle.apps.fnd.security.AppsServletFilter.doFilter(AppsServletFilter.java:318)
at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:642)
at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:391)
at com.evermind.server.http.HttpRequestHandler.doProcessRequest(HttpRequestHandler.java:908)
at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:458)
at com.evermind.server.http.AJPRequestHandler.run(AJPRequestHandler.java:313)
at com.evermind.server.http.AJPRequestHandler.run(AJPRequestHandler.java:199)
at oracle.oc4j.network.ServerSocketReadHandler$SafeRunnable.run(ServerSocketReadHandler.java:260)
at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:303)
at java.lang.Thread.run(Thread.java:744)

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