Function of the #region Helpers as argument of a function in OnBarUpdate

[Stanfillirenfro]

Hello! I am failing since a certain time already to sle a problem related to a unction of the region Helpers as argument of a function in protected override void OnBarUpdate.
I am having the following error message:

Error on calling "OnBarUpdate" method on bar 500: Object reference not set to an instace of an object.

In the region parameters, I have:

  private double [][] Val1 = new double[2][];

In OnBarUpdate:

 if(CurrentBar < 500) return;
 double mov = EMA(Close, 14)[0];
 double myEMA = CostFunc(mov, 15, 0,618);

In the region Helpers I have:

#region Helpers
double CostFunc(double myPrice, int period, double y)
{
  Val1[1]]0] = y*2
  Val1[2]]0] = 7y*5
  return(Val1[1][0] + Val1{[2]]0]);
}

I made sure with the condition " if(CurrentBar < 500) return;" that I will not reach 500 bars with my array. How is it possible that the error occured on bars 500?
Why is the function of the region Helpers creating problem in "OnBarUpdate"?

I would apprecaite any help.

Thanks in advance.

[NinjaTrader_Emily]

Hello Stanfillirenfro,

Thank you for your inquiry.

Are you trying to use a multidimensional array for Val1? If so, I suspect there is an issue with the declaration of the array containing empty square brackets. In C#, multidimensional arrays are declared with one set of square brackets that contains commas depending on how many dimensions are being used. Here is a publicly available link from the Microsoft website with more information:

https://learn.microsoft.com/en-us/dotnet/csharp/programming-guide/arrays/multidimensional-arrays

Also, double-check all of your brackets and ensure they are opening/closing properly. In the following lines, it appears that the bracket before the zero is potentially facing the wrong direction:

Val1[1]]0] = y*2
Val1[2]]0] = 7y*5
return(Val1[1][0] + Val1{[2]]0]);

Please let us know if we may be of further assistance.

[Stanfillirenfro]

Many thanks NinjaTrader_Emily for your reply.

I was using here a JAGGED ARRAY which is also used in C#. Checking the documentation you sent me I have realized that I was not initializing each element of the array. I think the problem should be there.
I have checked the brackets too. Thanks!
I have to reimplement the code again and I will revert to you very soon.

Many thanks again.