Hey hi.. this block actually if (ExistingAssociatetbl.Rows.Count > 0) { IdentityValue = Convert.ToInt16(ExistingAssociatetbl.Rows[ExistingAssociatetbl.Rows.Count - 1][0].ToString()); IdentityValue += 1; } and also.. the stack exception shows error in this method too.. and the line is marked with two ** private bool CheckDuplicates(System.Data.DataTable dtCheckDuplicates) { DataTable dtDuplicateRecords = dtCheckDuplicates.Clone(); bool blnCheckDuplicate; for (int iRow = 0; iRow <= dtCheckDuplicates.Rows.Count - 1; iRow++) { blnCheckDuplicate = false; ** string strCheckRow = string.Empty; object[] arr = dtCheckDuplicates.Rows[iRow].ItemArray; for (int iColumn = 0; iColumn <= arr.Length - 1; iColumn++) { if (dtCheckDuplicates.Columns[iColumn].ColumnName.Trim().ToUpper() != "SNO") { if (iColumn != arr.Length - 1) strCheckRow += dtCheckDuplicates.Columns[iColumn].ColumnName + " = '" + arr[iColumn].ToString() + "' and "; else strCheckRow += dtCheckDuplicates.Columns[iColumn].ColumnName + " = '" + arr[iColumn].ToString() + "'"; } } if (dtDuplicateRecords.Select(strCheckRow).Length > 0) { blnCheckDuplicate = true; } if (!blnCheckDuplicate) { DataRow[] drs = dtCheckDuplicates.Select(strCheckRow); if (drs.Length > 1) { lblError.Text = ""; lblError.Text = AdhocConstants.DuplicateTravelPlan; return true; } } } return false; } thnks for the help..

hey thnks dude.. :) lemme try that

i'l get u the code snippet..

public void SaveNewRecords()
{
try
{
if (!Page.IsValid)
{
return;
}
dgTravelPlan.ShowFooter = false;

            DataTable ExistingAssociatetbl = new DataTable();
            if (Session\[AdhocConstants.sessionRequestData\] != null)
            {
                ExistingAssociatetbl = (DataTable)Session\[AdhocConstants.sessionRequestData\];

                ExistingAssociatetbl.Columns\[0\].AutoIncrement = true;
                ExistingAssociatetbl.Columns\[0\].AutoIncrementSeed = 1;
                int IdentityValue;
                if (ExistingAssociatetbl.Rows.Count > 0)
                {
                    IdentityValue = Convert.ToInt16(ExistingAssociatetbl.Rows\[ExistingAssociatetbl.Rows.Count - 1\]\[0\].ToString());
                    IdentityValue += 1;
                }
                else
                    IdentityValue = 1;

                AdhocUtility objutility = new AdhocUtility();

                GetTravelPlanFooter();

                DataRow tblExistingRow = objutility.CreateAssociateRow(ExistingAssociatetbl, FromCity, PickupLocationType, PickupLocation, DropLocationType, DropLocation, PickupDate, PickupTime, ReturnPickupTime, NOD, Disposal, PickupTypeValue, DropTypeValue, FromCityValue, DisposalID, DestinationCityValue, InterCity);
                tblExistingRow\["Sno"\] = IdentityValue;
                ExistingAssociatetbl.Rows.Add(tblExistingRow);


                if ((CheckDuplicates(ExistingAssociatetbl) == false) & (CheckDateTime(ExistingAssociatetbl) == false))
                {
                    if (IdentityValue == 1)
                        ExistingAssociatetbl.Rows.Find(Sno = 1).Delete();
                    ExistingAssociatetbl.AcceptChanges();
                    Session\[AdhocConstants.sessionRequestData\] = ExistingAssociatetbl;
                    dgTravelPlan.DataSource = Session\[AdhocConstants.sessionRequestData\];
                    dgTravelPlan.DataBind();
                    if (strStatus == AdhocConstants.TypeModify)
                        dgTravelPlan.Rows\[0\].Visible = true;
                    else
                        dgTravelPlan.Rows\[0\].Visible = false;

                    btnSubmit.Visible = true;

Hi.. thnks for the reply.. the issue is - i am not able to reproduce the same exception in my local.. i am in tech support for this application and its been done by a client in live environment.. i can share u the stack trace but wont be of much use i guess.. if u can giv me a rough reason of occurance this error..i'l debug and try to find the point of cause..

Can anyone please help me with the following exception. Exception Type: System.Data.SyntaxErrorException ----------------------------------------------------------- Message: Syntax error: Missing operand after 'V' operator. ----------------------------------------------------------- Data: System.Collections.ListDictionaryInternal TargetSite: System.Data.ExpressionNode Parse() HelpLink: NULL/Undefined Source: System.Data what is a 'V' operator ?? how shld i proceed about fixing this ?? thanks