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

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java.lang.NullPointerException:
at oracle.adf.model.binding.DCIteratorBinding.getSortCriteria(DCIteratorBinding.java:3715)
at oracle.adf.model.binding.DCInvokeMethod.setAssociatedIteratorBinding(DCInvokeMethod.java:865)
at oracle.adf.model.binding.DCIteratorBinding.cacheRefOnOperation(DCIteratorBinding.java:5132)
at oracle.jbo.uicli.binding.JUMethodIteratorDef$JUMethodIteratorBinding.getActionBinding(JUMethodIteratorDef.java:283)
at oracle.jbo.uicli.binding.JUMethodIteratorDef.isRefreshable(JUMethodIteratorDef.java:59)
at oracle.adf.model.binding.DCExecutableBindingDef.isRefreshable(DCExecutableBindingDef.java:274)
at oracle.adf.model.binding.DCBindingContainer.internalRefreshControl(DCBindingContainer.java:2975)
at oracle.adf.model.binding.DCBindingContainer.refresh(DCBindingContainer.java:2845)
at oracle.adf.controller.v2.lifecycle.PageLifecycleImpl.prepareModel(PageLifecycleImpl.java:112)
at oracle.adf.controller.v2.lifecycle.Lifecycle$2.execute(Lifecycle.java:137)
at oracle.adfinternal.controller.lifecycle.LifecycleImpl.executePhase(LifecycleImpl.java:192)
at oracle.adfinternal.controller.faces.lifecycle.ADFPhaseListener.access$400(ADFPhaseListener.java:21)
at oracle.adfinternal.controller.faces.lifecycle.ADFPhaseListener$PhaseInvokerImpl.startPageLifecycle(ADFPhaseListener.java:231)
at oracle.adfinternal.controller.faces.lifecycle.ADFPhaseListener$1.after(ADFPhaseListener.java:267)
at oracle.adfinternal.controller.faces.lifecycle.ADFPhaseListener.afterPhase(ADFPhaseListener.java:71)
at oracle.adfinternal.controller.faces.lifecycle.ADFLifecyclePhaseListener.afterPhase(ADFLifecyclePhaseListener.java:53)
at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl._executePhase(LifecycleImpl.java:364)
at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:177)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:265)
at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:300)
at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)
at oracle.adf.model.servlet.ADFBindingFilter.doFilter(ADFBindingFilter.java:191)
at oracle.adf.share.http.ServletADFFilter.doFilter(ServletADFFilter.java:62)
at oracle.adfinternal.view.faces.webapp.rich.RegistrationFilter.doFilter(RegistrationFilter.java:97)
at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl$FilterListChain.doFilter(TrinidadFilterImpl.java:420)
at oracle.adfinternal.view.faces.activedata.AdsFilter.doFilter(AdsFilter.java:60)
at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl$FilterListChain.doFilter(TrinidadFilterImpl.java:420)
at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._doFilterImpl(TrinidadFilterImpl.java:247)
at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl.doFilter(TrinidadFilterImpl.java:157)
at oracle.bpel.services.workflow.client.worklist.util.WorkflowFilter.doFilter(WorkflowFilter.java:175)
at oracle.adf.library.webapp.LibraryFilter.doFilter(LibraryFilter.java:159)
at oracle.dms.wls.DMSServletFilter.doFilter(DMSServletFilter.java:330)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at weblogic.servlet.internal.RequestEventsFilter.doFilter(RequestEventsFilter.java:27)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.doIt(WebAppServletContext.java:3684)
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:2268)
at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2174)
at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1446)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:173)

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