Ah.... I've been frantically searching for the cause of the "ding dong".... figured out it was low memory but couldn't figure out what was generating it. Here's the thing though..... with version 4.751a I get nice smooth performance and no OOM warnings, and indeed no OOM failures. With version 4.8 or newer, not only do I get OOM warnings, but I get significantly lower performance - drops from the usual 18-20 FPS to 9-12 FPS - with a complex aircraft at a complex airport, no traffic, normal auto gen and FSX generated weather, but all the other settings at max -. If I regress to version 4.751a the performance springs back up again. Now, far be it for me to cast aspersions... but is there something in the newer versions that uses significantly more memory than the older versions, and might it be possible that something isn't releasing memory as it should? Are there functions - like logging - that I can switch off in FSUIPC?. Please appreciate, though, my system is pretty low-end... some products clobber my performance in FSX - notably pretty much any Aerosoft Scenery add ons.. I've got a lowly 3 gig RAM - I could go to 4, but that's about as much as my main board will take. If I'm careful which add ons I use, I can get away with it, but FSUIPC is pretty much essential, so if there's a problem there, I could do with some help resolving it.
Best Regards
Drew Melia