Data retrieval failed for the subreport, 'all_specificationrdlcsub', located at:

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C#

ASP.NET

RDLC

Data retrieval failed for the subreport, 'All_SpecificationRdlcSub', located at: 

when loading sub report

What I have tried:

Main Report Code

void LoadReport(int SampleDetails_Id)
    {        
        ReportViewer1.LocalReport.ReportPath = Server.MapPath("All_SpecificationRdlc.rdlc");
        ReportViewer1.LocalReport.EnableExternalImages = true;
        DataSet dsTata = new DataSet();


        DataTable DtChemicalGrading = new DataTable();
        DtChemicalGrading = CreateSampleTypeDt();
        Chemical_grade objChemical_grade = new Chemical_grade();

        DataTable dtChemicalType = objChemical_grade.GetReportData();
                
        ReportViewer1.LocalReport.DataSources.Clear();
        ReportViewer1.LocalReport.DataSources.Add(new ReportDataSource("DataSet1", dtChemicalType));

        ReportViewer1.LocalReport.SubreportProcessing += new SubreportProcessingEventHandler(SetSubDataSource);
        this.ReportViewer1.LocalReport.Refresh();

      

    }

Sub Report code

public void SetSubDataSource(object sender, SubreportProcessingEventArgs e)
    {

        int Chemical_Grade_Id = 0;
        int.TryParse(e.Parameters["Chemical_Grade_Id"].Values[0].ToString(), out Chemical_Grade_Id);
        DataTable dtGrading = new DataTable();
        Grading objGrading = new Grading();

        dtGrading = objGrading.GetSubReportData(Chemical_Grade_Id);



         e.DataSources.Add(new ReportDataSource("DataSet1", dtGrading));

}

I am getting data in subreport data table but when load it gives following Error.

Data retrieval failed for the subreport, 'All_SpecificationRdlcSub', located at: