or
{"Message":"An error has occurred.","ExceptionMessage":"Object reference not set to an instance of an object.","ExceptionType":"System.NullReferenceException","StackTrace":" at Telerik.Reporting.ExcelRendering.RenderingItem.Render(IWorksheet worksheet, TableLayoutInfo layoutInfo)\r\n at Telerik.Reporting.ExcelRendering.RenderingItemContainer.RenderInternal(IWorksheet worksheet, TableLayoutInfo layoutInfo)\r\n at Telerik.Reporting.ExcelRendering.Table.RenderInternal(IWorksheet worksheet, TableLayoutInfo layoutInfo)\r\n at Telerik.Reporting.ExcelRendering.RenderingItem.Render(IWorksheet worksheet, TableLayoutInfo layoutInfo)\r\n at Telerik.Reporting.ExcelRendering.RenderingItemContainer.RenderInternal(IWorksheet worksheet, TableLayoutInfo layoutInfo)\r\n at Telerik.Reporting.ExcelRendering.Section.RenderInternal(IWorksheet worksheet, TableLayoutInfo layoutInfo)\r\n at Telerik.Reporting.ExcelRendering.RenderingItem.Render(IWorksheet worksheet, TableLayoutInfo layoutInfo)\r\n at Telerik.Reporting.ExcelRendering.Group.RenderInternal(IWorksheet worksheet, TableLayoutInfo layoutInfo)\r\n at Telerik.Reporting.ExcelRendering.RenderingItem.Render(IWorksheet worksheet, TableLayoutInfo layoutInfo)\r\n at Telerik.Reporting.ExcelRendering.RenderingItemContainer.RenderInternal(IWorksheet worksheet, TableLayoutInfo layoutInfo)\r\n at Telerik.Reporting.ExcelRendering.Report.RenderInternal(IWorksheet worksheet, TableLayoutInfo layoutInfo)\r\n at Telerik.Reporting.ExcelRendering.RenderingItem.Render(IWorksheet worksheet, TableLayoutInfo layoutInfo)\r\n at Telerik.Reporting.ExcelRendering.Report.Render(IWorkbook workbook)\r\n at Telerik.Reporting.ExcelRendering.Excel97.ExcelReport.Telerik.Reporting.Processing.IRenderingExtension.Render(Report report, Hashtable renderingContext, Hashtable deviceInfo, CreateStream createStreamCallback, EvaluateHeaderFooterExpressions evalHeaderFooterCallback)\r\n at Telerik.Reporting.Processing.ReportProcessor.RenderCore(ExtensionInfo extensionInfo, IList`1 reports, Hashtable deviceInfo, IRenderingContext renderingContext, CreateStream createStreamCallback)\r\n at Telerik.Reporting.Processing.ReportProcessor.ProcessAndRender(String format, ReportSource reportSource, Hashtable deviceInfo, IRenderingContext renderingContext, CreateStream createStreamCallback)\r\n at Telerik.Reporting.Processing.ReportProcessor.ProcessAndRenderStateless(String format, ReportSource reportSource, Hashtable deviceInfo, IRenderingContext renderingContext, CreateStream createStreamCallback)\r\n at Telerik.Reporting.Processing.ReportProcessor.RenderReport(String format, ReportSource reportSource, Hashtable deviceInfo)\r\n at CPSReporting.TelerikCPSReportProcessor.RenderExcelReport(CPSReportDefinition reportDefinition) in c:\\Code\\CPS_SVN_REPO\\CPSReporting\\trunk\\TelerikCPSReportProcessor.cs:line 78\r\n at CreditPoint.Web.Controllers.WebAPI.ReportController.PrepResponse(HttpRequest request) in c:\\Code\\CPS_SVN_REPO\\Web\\branches\\RB-4.6\\Controllers\\WebAPI\\ReportController.cs:line 69\r\n at CreditPoint.Web.Controllers.WebAPI.ReportController.Post() in c:\\Code\\CPS_SVN_REPO\\Web\\branches\\RB-4.6\\Controllers\\WebAPI\\ReportController.cs:line 27\r\n at lambda_method(Closure , Object , Object[] )\r\n at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.<>c__DisplayClass13.b__c(Object instance, Object[] methodParameters)\r\n at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.Execute(Object instance, Object[] arguments)\r\n at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.<>c__DisplayClass5.b__4()\r\n at System.Threading.Tasks.TaskHelpers.RunSynchronously[TResult](Func`1 func, CancellationToken cancellationToken)"}InstanceReportSource instanceReportSource = new InstanceReportSource();XmlReaderSettings xmlReaderSettings = new XmlReaderSettings();xmlReaderSettings.IgnoreWhitespace = true;ReportXmlSerializer serializer = new ReportXmlSerializer();XmlReader primaryReportXmlReader = XmlReader.Create(reportDefinition.PrimaryReport.TemplateLocation, xmlReaderSettings);Telerik.Reporting.Report primaryReport = (Telerik.Reporting.Report)serializer.Deserialize(primaryReportXmlReader);primaryReportXmlReader.Close();this.SetConnectionStrings(ref primaryReport, reportDefinition.ConnectionString);instanceReportSource.ReportDocument = primaryReport;if (reportDefinition.PrimaryReport.ReportParameters != null){ foreach (KeyValuePair<string, object> item in reportDefinition.PrimaryReport.ReportParameters) instanceReportSource.Parameters.Add(this.CreateParameter(item.Key, item.Value));}foreach (CPSReport cpsSubReport in reportDefinition.SubReports){ XmlReader xmlReader = XmlReader.Create(cpsSubReport.TemplateLocation, xmlReaderSettings); Telerik.Reporting.Report subReportInstance = (Telerik.Reporting.Report)serializer.Deserialize(xmlReader); xmlReader.Close(); this.SetConnectionStrings(ref subReportInstance, reportDefinition.ConnectionString); Telerik.Reporting.SubReport subReport = primaryReport.Items.Find(cpsSubReport.ReportName, true).FirstOrDefault() as Telerik.Reporting.SubReport; ReportSource subReportSource_Type = subReport.ReportSource; InstanceReportSource subReportSource_Instance = new InstanceReportSource(); subReportSource_Instance.ReportDocument = subReportInstance; foreach(Telerik.Reporting.Parameter param in subReportSource_Type.Parameters) subReportSource_Instance.Parameters.Add(param); subReport.ReportSource = subReportSource_Instance;}Hashtable settings = new Hashtable() { { "UseNativePageHeader", false }, { "UseNativePageFooter", true }, { "ShowGridLines", false }};//Exception thrown here:RenderingResult result = _reportProcessor.RenderReport("XLS", instanceReportSource, settings);return result.DocumentBytes;