Hi Harry,I carefully verified objects management and memory heap ...Even jumped from a location to another without memory problems !I will try to fly away some 200 NM and watch where is the problem : thanks for the advise.Laurent (rotw)

LaurentMaybe its just a bug in FLY. I have never been able to figure out the method that FLY uses to call DeleteObject. It obviously waits until the object is not needed. But I tink it also has a time componenet to it. In my case I flew from Cincinnati (where I had the smokestack) to Richmond which is about 350 miles and I was about 40 minutes into the flight when the problem occrued. Harry

Hi all, and harryg,I've just posted the v2.0 with memory bug solution, less wind magnitude and a new tag for no wind conditions.Best regards to all of you,laurent (rotw)

Congratulation for all experiments that help FlyII to be better day by day. ThanksGiorgio Gnesda