Data retrieval failed for the subreport, 'Subreport1', located at

Posted Jan 01, 1970 12:00 AM

I am trying to get a subreport working. I am using VS 2010. I've inserted a "Subreport1" into my main report and keep getting the error: Data retrieval failed for the subreport, 'Subreport1', located at....

Here's my code:

public partial class rptEngOrd : Form
    public rptEngOrd()

    private List<EngOrd> eoNumParam;
    private string eonum;
    private DataSet dsReport;
    private DataSet dsSubReport;

    private void rptEngOrd_Load(object sender, EventArgs e)

    private void LoadComboBoxes()
            eoNumParam = EngOrdDB.GetDistinctEONum();
            cboEONum.DataSource = eoNumParam;
            cboEONum.SelectedIndex = -1;

        catch (Exception ex)
            MessageBox.Show(ex.Message, ex.GetType().ToString());

    private void btnPreview_Click(object sender, EventArgs e)

            if (cboEONum.SelectedValue.ToString().Equals("zALL"))
                eonum = "";
                eonum = cboEONum.SelectedValue.ToString();

            //get the data
            dsReport = EngOrdDB.GetEngOrdbyEONum(eonum);

            //provide local report information to viewer
            reportViewer1.LocalReport.ReportEmbeddedResource = "CustomMenu.rptEngOrd.rdlc";
            reportViewer1.ProcessingMode = ProcessingMode.Local;

            //prepare report data source
            ReportDataSource rds = new ReportDataSource();
            rds.Name = "dsReport";
            rds.Value = dsReport.Tables[0];

            //prepare sub report data source
            dsSubReport = EngOrdTaskDB.GetEngOrdTaskbyEONum(eonum);
            ReportDataSource rdsSub = new ReportDataSource();
            rdsSub.Name = "dsSubReport";
            rdsSub.Value = dsSubReport.Tables[0];
            reportViewer1.LocalReport.SubreportProcessing += new SubreportProcessingEventHandler(srptProcessingEventHandler);

            //load the report viewer


        catch (Exception ex)
            //display generic message back to user



    private void srptProcessingEventHandler(object sender, SubreportProcessingEventArgs e)
        ReportDataSource r = reportViewer1.LocalReport.DataSources[1];



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