I've been getting this Memory Application Error since a few weeks ago. It started happening when I bought a new video card (Galax NVIDIA GTX 1060). But the system is clean (recently formatted) and all drivers are up-to-date.
It usually seems to happen when I'm joining a server and I ALT+TAB the game when it's still loading the map. But I need to know if it's a hardware issue or a game issue, as I've seen more people complaining about the same errors.
I checked Arma 3's wiki and, so far, I've done the following steps:
Try joining another server, then rejoin the previous one. (OK)
Update the graphics card drivers to a newer version. (OK)
Rollback the graphics card drivers to an older version. (OK)
Check the temperature of your GPUs and CPUs. (OK)
Verify the integrity of the game cache using Steam. (OK)
Re-install DirectX. (OK)
Uninstall the Visual C++ 2013 Redistributable package (x86 version), restart your computer and install the package again (do not use the Repair function). (OK)
Run a Windows System File Check tool to repair corrupted system files. (OK)
The errors occur occasionally. More info can be found here: https://forums.bistudio.com/topic/194419-memory-application-error
Hope to get a quick answer, since I'm running out of warranty-period.