Okay, I'll try these ...Thanks. and BTW it was doing the same before I switched to dev... with or without mods

https://www.dropbox.com/s/vswadlakfncywkg/ArmaReport_Log_20161217T020223_drumn.zip?dl=0 This time the crash occurred while switching from the scenario UI to the main UI.( when I hit the BACK button). And it happens every time since I've switched to dev. 32 bit version

https://www.dropbox.com/s/8g4ppkey28m1z01/ArmaReport_Log_20161216T220215_drumn.zip?dl=0 okay...try that.

Sorry about that... I thought I uploaded a report... I tried to upload it again and it kept saying that it couldn't be read. but anyway an answer to your questions is 1. Single player 2. It always happens when I'm in a helicopter. In all instances ( about ten times) I was (in all cases) playing a scenario from the steam workshop called piloting the A9. Just before it crashes the frames drop to about 1 frame every 3 seconds.
specs are.
cpu. 6850k
graphics. NVidia 1080
x 99 motherboard
32 gigs memory

sorry the first picture I uploaded was the wrong one