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The Instruction at 0x004a15d7 referenced memory at 0x724e6000
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After playing the experimental branch for a bit today i noticed recurring crashes because of memory errors.

The error reads "The Instruction at 0x004a15d7 referenced memory at 0x724e6000 The memory could not be written."

I have a total of 8GB Ram and Windows has allocated another 8GB of virtual memory.


Legacy ID
Game Crash
Steps To Reproduce

Will happen randomly whilst playing the game (seems possible that it has a higher chance of occuring when the server crashes / freezes / restarts unexpectedly).

Additional Information

Attached an image of the memory usage on crash.


Example RPT of crash

Event Timeline

f3cuk edited Steps To Reproduce. (Show Details)Feb 24 2015, 10:10 PM
f3cuk edited Additional Information. (Show Details)
f3cuk set Category to Game Crash.
f3cuk set Reproducibility to Sometimes.
f3cuk set Severity to None.
f3cuk set Resolution to Open.
f3cuk set Legacy ID to 1517325547.May 8 2016, 9:36 PM
f3cuk added a subscriber: f3cuk.May 8 2016, 9:36 PM
f3cuk added a comment.Feb 25 2015, 4:54 PM

Some extended RPT info on the crashes (they keep happening)

Exception code: C0000005 ACCESS_VIOLATION at 004A15D7
Allocator: C:\Program Files (x86)\Steam\steamapps\common\DayZ\dll\tbb4malloc_bi.dll
graphics: D3D9, Device: AMD Radeon R9 200 Series, Driver:aticfx32.dll
resolution: 1920x1080x32

DZ_Animals_CowV2 in DZ\animals\cow_1406\
DZ_Animals_sus_scrofa in DZ\animals\sus_scrofa\, DZ_Anims_Rtm in DZ\anims\data\
DZ_Buildings in DZ\buildings\


DZ_Weapons_Optics in DZ\weapons\attachments\optics\

Mods: DZ
Distribution: 0
Version 0.54.126645
Fault address: 004A15D7 01:000A05D7 C:\Program Files (x86)\Steam\steamapps\common\DayZ\DayZ.exe
file: cur_mp (CUR_MP)
world: ChernarusPlus
Prev. code bytes: 89 48 10 83 C0 12 83 FA 04 72 12 8B 0E 83 EA 04
Fault code bytes: 89 08 83 C6 04 83 C0 04 83 FA 04 73 EE 85 D2 74

EAX:51224FFD EBX:84FC2E14
ESI:84FCE684 EDI:00000100
DS:002B ES:002B FS:0053 GS:002B


note: Minidump has been generated into the file C:\Users\f3cuk\AppData\Local\DayZ\DayZ.mdmp

f3cuk added a comment.Feb 26 2015, 3:53 AM

So far no issues since I started using "-malloc=system -maxMem=2047".

Micheal added a subscriber: Micheal.May 8 2016, 9:36 PM

I have the same

Bugs still appear for me after 1 minute of gameplay or even when i log in can't even play.

Me and my friend have exact same bug occuring over and over.

Yeah it's a pain. I did however not encounter any issues since i started using -malloc=system -maxMem=2047 as launch parameters.

Played with four other guys today and it happened to everybody.

Same error here, game has always worked fine until new 0.54.126645 update, now it crashes every 45min-1hr, what is most annoying is after re-joining server for the 2nd or 3rd time, I join as a new spawn and lose all my gear!!!


I have the same error

pretty much same error here only a couple different numbers. only started happening since .54 "stable." keyword "stable"

f3cuk added a comment.Feb 28 2015, 4:59 PM

Guys really, try these as starting parameters: -malloc=system -maxMem=2047

1.) Right click DayZ on steam
2.) Click on Properties
3.) Click Set launch options
4.) Enter: -malloc=system -maxMem=2047 so it looks like this

I had the same thing happen its a problem with memory management. It would appear that if you have a lot of memory this can occur. Not sure if it might be cpu also.

Here's how to fix it :-
And it will fix it!

Lets assume you have steam.

  1. Right click on DayZ in steam and select properties.
  2. Click on the general TAB along the top. (Might already be on that)
  3. At bottom of screen click on "Set Launch Options"
  4. A Box will open type in ---> -maxMem=2048

Do not include ---> its simply pointing to what you type.

This will cure the trouble your having. If it still occurs you might what to also try.

How many extra cores/threads your CPU has, see the list below:
Amd cpus:
-Dual Core: -cpuCount=2, -exThreads=1
-Quad Core: -cpuCount=4, -exThreads=3
-Six Cores: -cpuCount=4, -exThreads=5
-Eight Cores: -cpuCount=4, -exThreads=7
Intel cpus:
-Dual Core: -cpuCount=2, -exThreads=1
-Dual Core with 4 threads: -cpuCount=2, -exThreads=3
-Quad Core: -cpuCount=4, -exThreads=3
-Quad Core with 8 threads: -cpuCount=4, -exThreads=7

example my added line would be ---->
-maxMem=2048 -cpuCount=4 -exeThread=7

If your not using steam find your game exe file and add it.