Did you play our official coop missions or did you play any custom mod?

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 5,000k, so you can attach here. Thank you.

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

In case of random crashes, please install latest graphic and sound drivers. Usage of driver cleaner before installing new drivers will make sure you have no corrupted drivers left on computer.

I have uploaded the files that were in the folder you directed and it was happening on Wasteland servers A.K.A custom server mission

ever since alpha launch I have not been able to complete a coop mission without crashing

Crash information below

Problem signature:

Problem Event Name:	APPCRASH
Application Name:	arma3.exe
Application Version:	0.5.102.571
Application Timestamp:	512deb6a
Fault Module Name:	arma3.exe
Fault Module Version:	0.5.102.571
Fault Module Timestamp:	512deb6a
Exception Code:	c0000005
Exception Offset:	00821fc2
OS Version:	6.0.6002.2.2.0.768.3
Locale ID:	1033
Additional Information 1:	fd00
Additional Information 2:	ea6f5fe8924aaa756324d57f87834160
Additional Information 3:	fd00
Additional Information 4:	ea6f5fe8924aaa756324d57f87834160

Do you have same problem, when you play Escape from Stratis or Headhunters?

I'm pretty sure a lot of people are having this problem.

This is the same as 0003704. That was my report. Feel free to close mine down as duplicate

We need know in which mod it happened.

I can confirm I also experience crashes while "recieving" and during play, on both custom missions and on the 2 officially provided missions.

I also get terrible framerate in multiplayer, which doesn't seem to be a hardware issue because it's fine if the game is singleplayer, or if it's multiplayer and my machine is acting as the host! (Although my current rig is very old)

I'm going to collate some more info then possibly post up any issues I find, right now there's no real point me posting my DXDIag because I know what the "cause" will be... my system is too old. (But I think otherwise...)

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