Hello,
Thank you for reporting the issue.
We need crash dump files from this folder for solve your problem.
C:\Users\<Name>\AppData\Local\Arma 3\
Can you upload somewhere in winrar package please?
When the archive is smaller than 5000k, you can attach it here. When it is bigger, please use some free sharing service and post link here.

How to find correct crashdump file:
Try to make the crash happen
Look into crashdump folder
Upload crashdump with latest date in name (crashdump is rpt + bidmp + mdmp file with same name). Please try to provide as many crashdumps as possible, it helps us investigating the problem in a big way.

Thank you.

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

Crush dumps uploaded.

Blues

Hi.

I am responding here, because I get the exact same error message, but while playing multiplayer.

I have included the crash files, but mdmp file was not genereated. (arma3-crash.7z)

Interesting is, that everyone on the server experienced severe desych/lag, then my game crashed with the "Arma 3. Out of memory (requested 0 KB)". What is even more interesting, is that my friends game got really laggy, and then he was propelled many kilometers to the ocean(!). His game did not actually crash. He just died in game.

Also, I was running the server myself (on a different dedicated machine). Server was writing logs to stdout, because it was a child progress in a node app, so I don't have full logs any more. I did grab this though that looked really interesting:

ARMA STDERR says: 20:34:52 Matrix is not valid as physx transform!
20:34:52 Matrix is not valid as physx transform!
20:34:52 Matrix is not valid as physx transform!
20:34:52 Matrix is not valid as physx transform!
20:34:52 Matrix is not valid as physx transform!
20:34:52 Matrix is not valid as physx transform!
20:34:52 Matrix is not valid as physx transform!

ARMA STDERR says: 20:34:52 Matrix is not valid as physx transform!
20:34:52 Matrix is not valid as physx transform!
20:34:52 Matrix is not valid as physx transform!
20:34:52 Matrix is not valid as physx transform!
20:34:52 Matrix is not valid as physx transform!
20:34:52 Matrix is not valid as physx transform!
20:34:52 Matrix is not valid as physx transform!
20:34:52 Matrix is not valid as physx transform!
20:34:52 Matrix is not valid as physx transform!

So, something going wrong with the physx definitely sounds like something that might propel people couple kms into the ocean:)

Arma client version 1.36.128579
ArmA Linux Server, ver. 1.36.128579

hey,try increasing ur virtual memory,this should help..
How to increase virtual memory:
1)open my computer
2)open system properties
3)on the left there is something called(Advanced system settings)
4)window will pop up,open the advanced tab
5)on performance click settings
6)window will pop up,open advanced tab
7)virtual memory click change
8)choose ur drive(the drive u have arma 3 in)
9)custom size,change it(depends on ur drive space free EG:if u have 80 gb free,make the initial 19531 and the maximum size 27415 (u can change the virtual memory to anything)But remember the more it increases the more the game will perform better...
10)restart the game and try the game...hope it helps..
Sorry for my bad english