Getting an error when moving a drawing tool

[ofiramitai]

Hi,

I've created a drawing tool that draws a zone. The tool is derived from the RegionHighlightBase.
When I attach the tool to All Charts and try to move it around the chart, the screen freeze for many seconds, and under the log screen, I see the message:
"Error on getting/setting property 'InitialMouseDownAnchor' for NinjaScript 'Zone': Exception has been thrown by the target of an invocation."

If I change the Attach To property to just the current chart, there is no problem.

Can you think of a reason this happens?

Below is the code:

public override void OnMouseMove(ChartControl chartControl, ChartPanel chartPanel, ChartScale chartScale, ChartAnchor dataPoint)
{
base.OnMouseMove(chartControl, chartPanel, chartScale, dataPoint);

StartAnchor.Price = Math.Round(StartAnchor.Price * 4, MidpointRounding.ToEven) / 4;
EndAnchor.Price = Math.Round(EndAnchor.Price * 4, MidpointRounding.ToEven) / 4;
Tag = String.Format("@Z {0:0.00}-{1:0.00}", Math.Round(StartAnchor.Price * 4, MidpointRounding.ToEven) / 4, Math.Round(EndAnchor.Price * 4, MidpointRounding.ToEven) / 4);


if (StartAnchor.Price != lastStartAnchorPrice || EndAnchor.Price != lastEndAnchorPrice)
{
if (lastEndAnchorPrice != 0 && disableUponMove)
{

Active = false;
}
lastStartAnchorPrice = StartAnchor.Price;
lastEndAnchorPrice = EndAnchor.Price;
}

}

[NinjaTrader_BrandonH]

Hello ofiramitai,

Thanks for your post.

I have moved this forum post to the NinjaTrader Desktop General Development section of the Forums since the question is related to creating a DrawingTool and not specifically an Indicator.

That said, it could be possible that you are causing an endless loop in the script. When working with any issue, it is important to take steps to isolate the issue so that the exact line causing the behavior can be found. This is a process of elimination and a process of debugging by adding prints.

I suggest reducing the script by commenting out code until the behavior stops. Then uncomment lines of code until the behavior returns to identify the specific line causing the behavior in your script. Debugging prints may also be added to narrow in on the offending code.

Let me know if you have further questions.