Topic: I run system via Strategy Trader n got this error: Invalid ticket.

Hi, whenever my strategy tried to place an order, eg. EurUSD Entry Order Sent with SL=0 but TP=1.35xx etc. 

3 minutes later, I get this message in the Strategy Trader journal -Error in operation execution: Invalid ticket.

And the order that was initially sent and executed, was closed and hence made a loss 3 min later when the error message came in.

Could you kindly advice me what went wrong and how can i correct this problem.