[NullReferenceException: Object reference not set to an instance of an object.]
   ScriptingNamespace.ScriptingReport.initializeParameters() +92
   ScriptingNamespace.ScriptingReport.rep_lookback_BeforePrint(Object sender, PrintEventArgs e) +221
   DevExpress.XtraReports.ScriptManager.Run(EventHandler`1 handler, Object sender, E e) +118
   DevExpress.XtraReports.XREventsScriptManager.RunEventScript(Object eventId, String eventName, IScriptable scriptable, E e) +263

[Exception: The following error occurred when the script in procedure rep_lookback.BeforePrint was executed:
 Object reference not set to an instance of an object.]
   DevExpress.XtraReports.XREventsScriptManager.RunEventScript(Object eventId, String eventName, IScriptable scriptable, E e) +699
   DevExpress.XtraReports.UI.XRControl.RunEventScript(Object eventId, String eventName, E e) +104
   DevExpress.XtraReports.UI.XRControl.OnBeforePrint(PrintEventArgs e) +46
   DevExpress.XtraReports.UI.XtraReport.OnBeforePrint(PrintEventArgs e) +24
   DevExpress.XtraReports.UI.XtraReport.CreateDocument(Single progressRange, Boolean buildPagesInBackground, Boolean suppressClearDataContext) +531
   DevExpress.XtraReports.UI.XtraReport.TryCreateDocument(Single progressRange, Boolean buildPagesInBackground, Boolean suppressClearDataContext) +100

[Exception: The following error occurred when the script in procedure rep_lookback.BeforePrint was executed:
 Object reference not set to an instance of an object.]
   DevExpress.XtraPrinting.PrintingSystemBase.OnCreateDocumentException(ExceptionEventArgs args) +4143676
   DevExpress.XtraReports.UI.XtraReport.TryCreateDocument(Single progressRange, Boolean buildPagesInBackground, Boolean suppressClearDataContext) +244
   DevExpress.XtraReports.UI.XtraReport.CreateDocument(Boolean buildPagesInBackground) +14
   DevExpress.XtraReports.UI.XtraReport.CreateDocument() +15
   DevExpressReportFail.FailingReport.Page_Load(Object sender, EventArgs e) in d:\SC\VSProject\T251029\test\DevExpressReportFail\DevExpressReportFail\FailingReport.aspx.cs:32
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +51
   System.Web.UI.Control.OnLoad(EventArgs e) +92
   System.Web.UI.Control.LoadRecursive() +54
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +772