Error Message Box (from IB)

[SteveB]

In the fast moving market today, I believe my script tried changing the Target at the same time the order got filled (using IB demo acct).

NT display a message box indicating I tried changing a price for an order that was not there (sorry did not copy details).

Instead of NT displaying this message box, would it not be more appropriate to return an error in the OnOrderUpdate section?

[NinjaTrader_JoshP]

I believe you do get both. This scenario is very possible. What happens when you try to modify an already terminated order is it will be ignored. Please use TraceOrders = true to see the exact message.