Thread being used?

[lucyjoy]

Hi

I have been using an indicator for 2 years in Ninjatrader, its open code but I have not changed anything.

Suddenly last week it wont load and I get this message

Indicator 'Juncuc': Error on calling 'OnBarUpdate' method on bar 0: The calling thread cannot access this object because a different thread owns it.

Any Ideas please?

[lucyjoy]

It seems to be this causing it, when I change the colours in the inputs gui it works....

private Brush longColour=new SolidColorBrush( Color.FromRgb(15,90,180));//Brushes.Black;
private Brush shortColour=new SolidColorBrush( Color.FromRgb(255,50,50));//Brushes.Black;

any ides why?

[lucyjoy]

I have attached a picture, if I change in the inputs gui to this the error goes away and it loads...

[NinjaTrader_BrandonH]

Hello lucyjoy,

Thanks for your post.

A private brush would not be in the UI and changing a brush in the UI would not cause a threading error. It is likely some other code in the script is causing the threading error to occur.

Are you making sure to set a default brush color in State.SetDefaults for public brushes in the script?

This error could also occur if you are trying to get a SharpDX brush from a System.Windows.Media brush.

Ultimately, you would need to reduce the script by commenting out code or add debugging prints to the script in OnBarUpdate() to determine exactly which line of code in OnBarUpdate() is throwing the threading error.

Below is a link to a forum post that demonstrates how to use prints to understand behavior.

https://ninjatrader.com/support/foru...121#post791121

Let me know if I may assist further.