I have aggressively tried to resolve this one myself but have not been able to figure out why this application is incredibly unstable / unusable.
Not too long ago when UE4 came the public I was able to successfully use the app however unstable it was with many of its functions. Recently (as of its last update) I can no longer even launch the UE4 (4.0.2) as it continues to crash (UE4Editor-Cmd.exe). I have seen similar posts however their solution is to force Nvidia graphics settings which uses some version of the Nvidia control panel I do not have, so I am assuming it must be specific to mobile / laptop users.
I have tried completely uninstalling it (down to removing every registry entry existent and temp files along with app data entries) for UE4. Re-downloading from the website and completely re-installing the app. I have disabled SLi disabled my quicksync (Intel) I have defined as generic of a 3d application profile in Nvidia control panel as I can manage for this app, but still no launching occurs. I have verified the integrity of the files several times. I have included links to screenshots of the issues in order so you can get an idea of whats happening, including some of my specs to make it easier to understand what is going on.
Update:
3 reinstall’s after finding this in the logs using -d3d11debug … same issue persists, even installer file is fresh from the site:
[2014.04.15-03.08.30:675][ 0]LogFileManager:Warning: ReadFile failed: Count=0 Length=1480934644 Error=The operation completed successfully. for file C:/ProgramData/Epic/Engine/DerivedDataCache/Boot.ddc
[2014.04.15-03.09.29:742][ 0]LogWindows:Error: appError called: Assertion failed: (Index >= 0) & (Index < ArrayNum) [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.0\Engine\Source\Runtime\Core\Public\Containers\Array.h] [Line: 518]
Array index out of bounds: 2147483640 from an array of size -2147483643
Stack:
Address = 0xd974b496 (filename not found) [in C:\Program Files\Unreal Engine\4.0\Engine\Binaries\Win64\UE4Editor-Core.dll]
Address = 0xd95ef685 (filename not found) [in C:\Program Files\Unreal Engine\4.0\Engine\Binaries\Win64\UE4Editor-Core.dll]
Address = 0xd94cfc01 (filename not found) [in C:\Program Files\Unreal Engine\4.0\Engine\Binaries\Win64\UE4Editor-Core.dll]
Address = 0xd94ddc40 (filename not found) [in C:\Program Files\Unreal Engine\4.0\Engine\Binaries\Win64\UE4Editor-Core.dll]
Address = 0xe7cbb62b (filename not found) [in C:\Program Files\Unreal Engine\4.0\Engine\Binaries\Win64\UE4Editor-DerivedDataCache.dll]
Address = 0xe7cbcda8 (filename not found) [in C:\Program Files\Unreal Engine\4.0\Engine\Binaries\Win64\UE4Editor-DerivedDataCache.dll]
Address = 0xe7cbdb99 (filename not found) [in C:\Program Files\Unreal Engine\4.0\Engine\Binaries\Win64\UE4Editor-DerivedDataCache.dll]
Address = 0xe7cbd4cc (filename not found) [in C:\Program Files\Unreal Engine\4.0\Engine\Binaries\Win64\UE4Editor-DerivedDataCache.dll]
Address = 0xe7cbdc76 (filename not found) [in C:\Program Files\Unreal Engine\4.0\Engine\Binaries\Win64\UE4Editor-DerivedDataCache.dll]
Address = 0xe7cbcb2d (filename not found) [in C:\Program Files\Unreal Engine\4.0\Engine\Binaries\Win64\UE4Editor-DerivedDataCache.dll]
Address = 0xe7cbdd7c (filename not found) [in C:\Program Files\Unreal Engine\4.0\Engine\Binaries\Win64\UE4Editor-DerivedDataCache.dll]
Address = 0xe7cbd7a3 (filename not found) [in C:\Program Files\Unreal Engine\4.0\Engine\Binaries\Win64\UE4Editor-DerivedDataCache.dll]
Address = 0xe7cbdcd1 (filename not found) [in C:\Program Files\Unreal Engine\4.0\Engine\Binaries\Win64\UE4Editor-DerivedDataCache.dll]
Address = 0xe7ca6710 (filename not found) [in C:\Program Files\Unreal Engine\4.0\Engine\Binaries\Win64\UE4Editor-DerivedDataCache.dll]
Address = 0xe7ca6b65 (filename not found) [in C:\Program Files\Unreal Engine\4.0\Engine\Binaries\Win64\UE4Editor-DerivedDataCache.dll]
Address = 0xe7ca6bbd (filename not found) [in C:\Program Files\Unreal Engine\4.0\Engine\Binaries\Win64\UE4Editor-DerivedDataCache.dll]
Address = 0xe7cbacac (filename not found) [in C:\Program Files\Unreal Engine\4.0\Engine\Binaries\Win64\UE4Editor-DerivedDataCache.dll]
Address = 0xd95f8ead (filename not found) [in C:\Program Files\Unreal Engine\4.0\Engine\Binaries\Win64\UE4Editor-Core.dll]
Address = 0xd95f8edb (filename not found) [in C:\Program Files\Unreal Engine\4.0\Engine\Binaries\Win64\UE4Editor-Core.dll]
Address = 0xd6f86a43 (filename not found) [in C:\Program Files\Unreal Engine\4.0\Engine\Binaries\Win64\UE4Editor-Engine.dll]
Address = 0x3f0a26ae (filename not found) [in C:\Program Files\Unreal Engine\4.0\Engine\Binaries\Win64\UE4Editor-Cmd.exe]
Address = 0x3f09cd6c (filename not found) [in C:\Program Files\Unreal Engine\4.0\Engine\Binaries\Win64\UE4Editor-Cmd.exe]
Address = 0x3f09ceca (filename not found) [in C:\Program Files\Unreal Engine\4.0\Engine\Binaries\Win64\UE4Editor-Cmd.exe]
Address = 0x3f0a8ae9 (filename not found) [in C:\Program Files\Unreal Engine\4.0\Engine\Binaries\Win64\UE4Editor-Cmd.exe]
Address = 0x3f0a94e9 (filename not found) [in C:\Program Files\Unreal Engine\4.0\Engine\Binaries\Win64\UE4Editor-Cmd.exe]
Address = 0x76f959ed (filename not found) [in C:\Windows\system32\kernel32.dll]
Address = 0x771cc541 (filename not found) [in C:\Windows\SYSTEM32\ntdll.dll]
Address = 0x771cc541 (filename not found) [in C:\Windows\SYSTEM32\ntdll.dll]
[2014.04.15-03.09.29:742][ 0]LogWindows:Error: Windows GetLastError: The operation completed successfully. (0)
[2014.04.15-03.09.29:813][ 0]LogWindows: === Critical error: ===