I am having trouble with some custom code, I want to get the range of my data and add a line midway

I tested out some code that works ok for a floatbar in the winforms charting object, and tried to use it in the reporting chart tool custom code.

double test = (double)floatBar.Values[0];

As soon as i put this code into my report it no longer runs as says there is an error, as soon as i remove  it it runs again.  Same for BeginValues, EndValues etc.

Am i doing something wrong?  I have two level grouping on my report but i'm not sure if that makes a difference.

using System;

using System.Drawing;

using Nevron.GraphicsCore;

using Nevron.Chart;

using Nevron.ReportingServices;

namespace MyNamespace

/// <summary>

/// Sample class

/// </summary>

public class MyClass

{

/// <summary>

/// Main entry point

/// </summary>

/// <param name="context"></param>

public static void RSMain(NRSChartCodeContext context)

{

if (context.Document.Charts.Count == 0)

return;

NChart chart = context.Document.Charts[0];

//Create shift markers

int shiftCount = context.GetInt32Parameter("shiftCount");

for (int i = 1; i < shiftCount; i++)

{

NFloatBarSeries floatBar = chart.Series[0] as NFloatBarSeries;

NAxis yAxis = chart.Axis((int)StandardAxis.PrimaryY);

//NAxisConstLine cl1 = chart.Axis(StandardAxis.PrimaryY).ConstLines.Add();

NAxisConstLine cl1 = yAxis.ConstLines.Add();

cl1.StrokeStyle.Color = Color.Purple;

cl1.StrokeStyle.Width = new NLength(1.5f);

cl1.FillStyle = new NColorFillStyle(new NArgbColor(125, Color.Purple));

cl1.Value = 40569.3;

double start = (double)floatBar.BeginValues[floatBar.BeginValues.Count - 1];

double end = (double)floatBar.EndValues[floatBar.BeginValues.Count - 1];

NAxisStripe s1 = chart.Axis(StandardAxis.PrimaryY).Stripes.Add(start, end);

s1.FillStyle = new NColorFillStyle(Color.FromArgb(125, Color.SteelBlue));

}