Unhandled exception: Object Rererence set to an instance of an object

[efeuvejota01]

Good morning:
I have an add-on based on the “AddOnShell (No tabs)” example provided in the forum.
In one of the CheckBox fields I have the following code:

When I click the checkbox being flat in any position the following is shown in the NinjaScriptOutput:


And the following error


Due to the messages in the output window I know that the error comes in the line 485
Question:
How can I workaround this? taking in mind that when I am in a position the `if´ works perfectly?

Thank you very much!!

[NinjaTrader_Kate]

Hello efeuvejota01,

Thank you for your post.

The most likely culprit here would be that the position object is null. Are you assigning position a value in OnPositionUpdate?

https://ninjatrader.com/support/helpGuides/nt8/positionupdate.htm

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

[efeuvejota01]

Thank you Kate!!
I changed the line for
" if ((position == null) || (position.MarketPosition!=MarketPosition.Flat))"
and now is working as intended.
Thank you