Array out of bound exception thrown when accessing multidimensional (2d) array inside OnCalculate

[lawrence910426]

Source Code:

https://pastebin.com/Tv7BELjw

I have met array out of bound exception while accessing 2d-array inside OnCalculate. But once I changed line 39 to

S[0][0].Data[k] = i * 2 + j;

, that is, access only the (0,0) element, the exception is no longer thrown.

I believe this is a compiler bug or some feature not documented.

Reproduce procedure:

Put https://pastebin.com/Tv7BELjw into an indicator and run the indicator.

Change line 39 to S[0][0].Data[k] = i * 2 + j; and rerun the indicator.

Expected behavior:

S[i][j].Data[k] = i * 2 + j; would not throw exception.

Related Topic:

https://www.mql5.com/en/forum/305638

[Carl Schreiber]

This is valid for you too: https://www.mql5.com/en/forum/305638#comment_24582343

[Alexandre Borela]

You have to specify the amount of buffers the indicator will use, it is working on [0][0] because by default, indicators have 1 buffer, add the following:

#property indicator_buffers 4

[lawrence910426]

Alexandre Borela #:
You have to specify the amount of buffers the indicator will use, it is working on [0][0] because by default, indicators have 1 buffer, add the following:

Thank you very much. I have forgotten the 

#property indicator_buffers 4

Wish you all a great day! Also thank you for your help!