Crystal reports - Database error code 17

Hi,

I have been trying to debug a project and everything is perfect except for the report generation module.

For report generation i am using Crystal reports, However when i try to generate the report, the Below error is displayed. Could anyone Help me to rectify the error.

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The Related coding is given below:-

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using CrystalDecisions.Shared;

using CrystalDecisions.CrystalReports.Engine;

using System.Data.SqlClient;

namespace msmReports

{

   public static  class util

    {

       public static void billById(string billno)

       {

           frmrptViewer frm = new frmrptViewer();

           frm.crv.ReportSource = new rptbill();

           ParameterFields fields = new ParameterFields();

           ParameterField field = new ParameterField();

           field.Name = "@billno";

           ParameterDiscreteValue value = new ParameterDiscreteValue();

           value.Value = billno;

           field.CurrentValues.Add(value);

           fields.Add(field);

           frm.crv.ParameterFieldInfo = fields;

           frm.Show();

       }

       public static void viewstock()

       {

           msmReports.frmrptViewer frm = new msmReports.frmrptViewer();

           frm.crv.ReportSource = new msmReports.rptStockview();

           frm.Show();

       }

    }

}

.

Please Check and reply if any solutions can be offerred.

Regards Noel......

Message was edited by: Don Williams