Hi !
Same here. (Last Nvidia driver)
Last week I flew a MP mission (F-18, Persian Gulf) with a friend, created after wednesday 2.5.4 update. No problem.
Today, back from holidays, I take the same mission file, edit it to make some changes to have a similiar mission (farther target location with more SAM and night time). Crash to desktop after about 30min without any crash message, crash log or track. We try again and crash again after almost the same amount of time.
I try in SP and it crash too. I had some mods so I try with no mods and do many flight test (using temporal acceleration), same result: crash. No specific action done when it crash.
Crash time is not always the same, it depend what I do. It can be after about 30min (or more) if I take off and fly at mission start. But I can stay 1h waiting on catapult then take off and it crash later.
But if I do several flights with same flight path and parameters (altitude, throttle, etc...) it will crash approximately at the same time/location.
last dcs.log and mission file attached.
From windows Event Viewer (Windows Logs/Application):
Maybe I say something stupid but it looks like a kind of "memory leak". It load/leak until a point where it crash. Havadarya Power Plant.miz dcslog.zip