Histogram type error

[User (Legacy)]

Hi,

Our system sets chart type in Page_Load function. For all chart types we 

used until now it worked well. Now we trying to use Histogram type. Form 

contains histogram chart and submit button, which submits form and does 

nothing. After second time button is pressed, form crashes with message:

[NullReferenceException: Object reference not set to an instance of an 

object.]

   SoftwareFX.ChartFX.Statistical.Server.BoxPlot.P(Int32 BH, 

GalleryAttribute BI, Int32 BJ, PaintMarkBase BK)

   SoftwareFX.ChartFX.Internet.Server.0S.DV(ChartCore 1KJ, IGalleryType 1KK)

   SoftwareFX.ChartFX.Internet.Server.ExtensionManager.IP(ChartCore 1XJ)

   SoftwareFX.ChartFX.Internet.Server.ChartCore.6R(Object 13L)

   SoftwareFX.ChartFX.Internet.Server.ChartCore.7H(IPersistBase 14P)

   SoftwareFX.ChartFX.Internet.Server.ChartCore.Import(FileFormat format, 

Stream stream)

   SoftwareFX.ChartFX.Internet.Server.ChartCore.Import(FileFormat format, 

String fileName)

   SoftwareFX.ChartFX.Internet.Server.Chart.LoadViewState(Object objState)

   System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +136

   System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +412

   System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +412

   System.Web.UI.Page.LoadPageViewState() +306

   System.Web.UI.Page.ProcessRequestMain() +447

If Visual Studio Designer is used for setting chart control type, then 

program does not crash (control creation code in InitializeComponent).

How to make program work correctly with chart type set in Page_Load 

function?

Code, used for chart type setting:

this.statistics1.Chart = this.Chart1;

this.statistics1.Gallery.Current = 

SoftwareFX.ChartFX.Statistical.Server.Galleries.Gallery.Histogram;

Regards, Vita