the source of report definition has not been specified

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I am getting the error "the source of report definition has not been specified",kindly help me this is my code

ReportViewer ReportViewer1 =null;
        try
        {
            rptData = new DataSet();
            objReportHelper = new ReportHelper();
 
            ReportViewer1 = new ReportViewer();
            ReportViewer1.Reset();
            if (Session["ReporttHelperObject"] != null)
            {
                objReportHelper = (ReportHelper)Session["ReporttHelperObject"];
 
                this.Title = objReportHelper.ReportMode.ToString().Replace("_", " ");
 
                rptData.ReadXmlSchema(Server.MapPath("Reports/DataSets/spReport_LoanSummaryBatchOther.xsd"));
 
                for (int i = 0; i < 5; i++)
                {
                    rptData.Tables[0].Rows.Add();
                    foreach (DataColumn dCol in rptData.Tables[0].Columns)
                    {
                        rptData.Tables[0].Rows[i][dCol.ColumnName] = dCol.DefaultValue;
                    }
                }
                //-------------------------------------------------------------
 
                ReportViewer1.ProcessingMode = ProcessingMode.Local;
                LocalReport rep = ReportViewer1.LocalReport;
                rep.Refresh();
                rep.ReportPath = "Reports/BatchOtherComments.rdlc";
 
                rptData.DataSetName = "spReport_LoanSummaryBatchOther";
                objReportDataSource = new ReportDataSource("spReport_LoanSummaryBatchOther", rptData.Tables[0]);
                //ReportViewer1.LocalReport.ReportPath = "Reports/BatchOtherComments.rdlc";
                rep.DataSources.Add(objReportDataSource);
             //   ReportViewer1.LocalReport.ReportEmbeddedResource = "Reports/BatchOtherComments.rdlc";
                //        byte[] rdlbytes = System.Text.Encoding.UTF8.GetBytes("Reports/rptDeniedLoansDetails.rdlc");
                //MemoryStream stream = new MemoryStream(rdlbytes);
                //ReportViewer1.LocalReport.LoadReportDefinition(stream);
 
 
                Warning[] warnings;
                string mimeType;
                string encoding;
                string extension;
                string deviceInfo;
                string[] streamids;
                deviceInfo =
                  "<DeviceInfo>" +
                  "  <OutputFormat>PDF</OutputFormat>" +
                  "  <PageSize>A4</PageSize>" +
                  "  <PageWidth>8.5in</PageWidth>" +
                  "  <PageHeight>11in</PageHeight>" +
                  "  <MarginTop>0.25in</MarginTop>" +
                  "  <MarginLeft>0.25in</MarginLeft>" +
                  "  <MarginRight>0.25in</MarginRight>" +
                  "  <MarginBottom>0.25in</MarginBottom>" +
                  "</DeviceInfo>";
                byte[] bytes = ReportViewer1.ServerReport.Render("PDF", null, out mimeType, out encoding, out extension, out streamids, out warnings);
                FileStream fs = new FileStream(@"C:/Users/wnaeem/Sample.PDF", FileMode.Create);
                fs.Write(bytes, 0, bytes.Length);
                fs.Close();
 
            }
        }
        catch (Exception ex)
        {
            throw ;
 
        }
        finally
        {
            ReportViewer1.Dispose();
        }