it doesn't really please me that others than me had the same problem ;-) The post of jcc on 2009.08.11 20:30 talked precisely of the problem i actually face.
Do you know a workaround that I can use to calculate the Margin without using the AccountMargin(), which is not reliable ?
We're talking here about the position sizing and the risk of the system... wich is the most important part of a system ...
Thank you for your help
Appears that this problem is Broker_Specific. Change Broker or Check for AccountMargin=0. Those are your obvious work around.