Index Out of Range, Exception Handled Still Error Thrown

Question

I have been getting a strange error during run time.

The Datatable is Below

I looked into my code and I specifically make it sure that this doesn't happen by using Rows.Count (for supportPointSelected). I check the Count and if and only of its lager than 0 (the First IF statement of the code) I go ahead with it. Please find the code below.

private List<byte> routeHandler(DataTable supportPointSelected, double taskState, int indices)
{
    //TPCANStatus statusCan = new TPCANStatus();
    int a = supportPointSelected.Columns.IndexOf("Number");     // column number indices
    int b = supportPointSelected.Columns.IndexOf("XSupport"); // column number X
    int c = supportPointSelected.Columns.IndexOf("YSupport"); // column number Y
    int d = supportPointSelected.Columns.IndexOf("VSupport"); // column number Velocity


    if (supportPointSelected.Rows.Count > 0) // Check to Avoid the Error
    {
        if (Convert.ToDouble(supportPointSelected.Rows[0][d]) == 0)
        {
            supportPointSelected.Rows[0][d] = 0.01; // This is the Point the Error Occurs
        }
        else { }
                }
    else { }

    List<byte> output = new List<byte>();
    // Logic do Something
    return output;
}