We need dxdiag and files from this folder for solve your problem. C:\Users\<Name>\AppData\Local\Arma 3 Alpha\
Can you upload somewhere in winrar package please?
When package will be smaller than 2,097k, so you can attach here. Thank you.

http://feedback.arma3.com/how-to-user.html.html

I will upload said files after I comeback from job :)

I've uploaded two dxdiags. I would upload rar'ed archive here but it's about 9mb If moderator or developer could hit me with e-mail then i will send it.
I can try upload it on site like zippyshare anyway.
ArmA 3 runs on 32bit but OS is 64bit.

Here is the DL link:
http://www28.zippyshare.com/v/62509218/file.html

Do you have still this crash?

Didn't had the time to test it but it mostly happened to me when playing AiA where alot of units are engaging - but it also happened to me in vanilla alpha game. Excessive explosions might be the case of it, as it happened to me when shooting unguided rockets in AiA or detonating satchel charges in vanilla.

I could not reproduce this bug while playing with AiA no more. Anyway it can still occur in modded or vanilla game so I would let it open for a while to stress it more.

This error does not molest my gameplay no longer so mod could probably set it as resolved.

Issue closed as obsolete. If you encounter this problem again, please create another ticket. Thank you.