FG28_Kodiak, it looks like PassThrough trigger works 2 times, when entering the zone and when exiting it. If there are several aircraft they can triger it several time as well. A solution is not to do any calculations or actions in onTrigger method but make them in some other method like OnTickGame if the trigger
was active before. It looks like my mission works now with this workaround but it is not very convenient. If you have any advice I will be grateful.
The mission is here
http://forum.1cpublishing.eu/showpos...1&postcount=10
Thanks again!