UE4 crashes on project startup

Community Community & Industry Discussion
1

Hi,

Every time I try to run a unreal project on my PC it crashes.
My PC has a GTX 1060 and 16GB RAM with an i7 7th gen.

This is the error I get on startup ->

Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x00000048

nvwgf2umx
nvwgf2umx
nvwgf2umx
nvwgf2umx
nvwgf2umx
nvwgf2umx
nvwgf2umx
nvwgf2umx
nvwgf2umx
nvwgf2umx
D3D12
D3D12
dxgi
dxgi
dxgi
dxgi
dxgi
dxgi
dxgi
UE4Editor_D3D12RHI
UE4Editor_D3D12RHI
UE4Editor_D3D12RHI
UE4Editor_RHI
UE4Editor_RHI
UE4Editor_RHI
UE4Editor_RHI
UE4Editor_Core
UE4Editor_Core
UE4Editor_RenderCore
UE4Editor_Core
UE4Editor_Core
kernel32
ntdll

I have already tried clean installation of the graphics driver and also tried deleting registry and data files for the drivers before installing. Still the same issue continues.

Please HELP!

2

Hi, is this a c++ project? I’m not sure if this is related but similar error in this thread which may help - Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0xffffffff - C++ Gameplay Programming - Unreal Engine Forums

3

Could be related to many things, look at your log folder, browse to the bottom part and check (post here) the last lines, which usually hint at affected files.

6

This is the Log file error –>

[2020.02.22-20.40.14:186] 65]LogThreadingWindows: Error: Runnable thread RHIThread crashed.
[2020.02.22-20.40.14:186] 65]LogWindows: Error: === Critical error: ===
[2020.02.22-20.40.14:186] 65]LogWindows: Error:
[2020.02.22-20.40.14:186] 65]LogWindows: Error: Fatal error!
[2020.02.22-20.40.14:186] 65]LogWindows: Error:
[2020.02.22-20.40.14:186] 65]LogWindows: Error: Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x00000048
[2020.02.22-20.40.14:186] 65]LogWindows: Error:
[2020.02.22-20.40.14:186] 65]LogWindows: Error: [Callstack] 0x00007ffdd411b530 nvwgf2umx.dll!UnknownFunction ]
[2020.02.22-20.40.14:186] 65]LogWindows: Error: [Callstack] 0x00007ffdd40c248b nvwgf2umx.dll!UnknownFunction ]
[2020.02.22-20.40.14:186] 65]LogWindows: Error: [Callstack] 0x00007ffdd3d7c32a nvwgf2umx.dll!UnknownFunction ]
[2020.02.22-20.40.14:186] 65]LogWindows: Error: [Callstack] 0x00007ffdd3d7becb nvwgf2umx.dll!UnknownFunction ]
[2020.02.22-20.40.14:186] 65]LogWindows: Error: [Callstack] 0x00007ffdd3334d4a nvwgf2umx.dll!UnknownFunction ]
[2020.02.22-20.40.14:186] 65]LogWindows: Error: [Callstack] 0x00007ffdd3ec3aec nvwgf2umx.dll!UnknownFunction ]
[2020.02.22-20.40.14:186] 65]LogWindows: Error: [Callstack] 0x00007ffdd3d96388 nvwgf2umx.dll!UnknownFunction ]
[2020.02.22-20.40.14:186] 65]LogWindows: Error: [Callstack] 0x00007ffdd406f02a nvwgf2umx.dll!UnknownFunction ]
[2020.02.22-20.40.14:186] 65]LogWindows: Error: [Callstack] 0x00007ffdd406d222 nvwgf2umx.dll!UnknownFunction ]
[2020.02.22-20.40.14:186] 65]LogWindows: Error: [Callstack] 0x00007ffdd3413231 nvwgf2umx.dll!UnknownFunction ]
[2020.02.22-20.40.14:186] 65]LogWindows: Error: [Callstack] 0x00007ffdd358a619 nvwgf2umx.dll!UnknownFunction ]
[2020.02.22-20.40.14:186] 65]LogWindows: Error: [Callstack] 0x00007ffdd33da863 nvwgf2umx.dll!UnknownFunction ]
[2020.02.22-20.40.14:186] 65]LogWindows: Error: [Callstack] 0x00007ffdd78e82ba d3d12.dll!UnknownFunction ]
[2020.02.22-20.40.14:186] 65]LogWindows: Error: [Callstack] 0x00007ffdd78e7950 d3d12.dll!UnknownFunction ]
[2020.02.22-20.40.14:186] 65]LogWindows: Error: [Callstack] 0x00007ffe671a2d05 dxgi.dll!UnknownFunction ]
[2020.02.22-20.40.14:186] 65]LogWindows: Error: [Callstack] 0x00007ffe671a504b dxgi.dll!UnknownFunction ]
[2020.02.22-20.40.14:186] 65]LogWindows: Error: [Callstack] 0x00007ffe671609bf dxgi.dll!UnknownFunction ]
[2020.02.22-20.40.14:186] 65]LogWindows: Error: [Callstack] 0x00007ffe67134ca4 dxgi.dll!UnknownFunction ]
[2020.02.22-20.40.14:186] 65]LogWindows: Error: [Callstack] 0x00007ffe6713ad2f dxgi.dll!UnknownFunction ]
[2020.02.22-20.40.14:186] 65]LogWindows: Error: [Callstack] 0x00007ffe67139c1b dxgi.dll!UnknownFunction ]
[2020.02.22-20.40.14:186] 65]LogWindows: Error: [Callstack] 0x00007ffe671343cf dxgi.dll!UnknownFunction ]
[2020.02.22-20.40.14:186] 65]LogWindows: Error: [Callstack] 0x00007ffddfaf0812 UE4Editor-D3D12RHI.dll!UnknownFunction ]
[2020.02.22-20.40.14:186] 65]LogWindows: Error: [Callstack] 0x00007ffddfaf0419 UE4Editor-D3D12RHI.dll!UnknownFunction ]
[2020.02.22-20.40.14:186] 65]LogWindows: Error: [Callstack] 0x00007ffddfaf32f0 UE4Editor-D3D12RHI.dll!UnknownFunction ]
[2020.02.22-20.40.14:186] 65]LogWindows: Error: [Callstack] 0x00007ffe0dd9b920 UE4Editor-RHI.dll!UnknownFunction ]
[2020.02.22-20.40.14:186] 65]LogWindows: Error: [Callstack] 0x00007ffe0dd9eff0 UE4Editor-RHI.dll!UnknownFunction ]
[2020.02.22-20.40.14:186] 65]LogWindows: Error: [Callstack] 0x00007ffe0dd89c97 UE4Editor-RHI.dll!UnknownFunction ]
[2020.02.22-20.40.14:186] 65]LogWindows: Error: [Callstack] 0x00007ffe0dda0d06 UE4Editor-RHI.dll!UnknownFunction ]
[2020.02.22-20.40.14:186] 65]LogWindows: Error: [Callstack] 0x00007ffdfc319ff2 UE4Editor-Core.dll!UnknownFunction ]
[2020.02.22-20.40.14:186] 65]LogWindows: Error: [Callstack] 0x00007ffdfc31a393 UE4Editor-Core.dll!UnknownFunction ]
[2020.02.22-20.40.14:186] 65]LogWindows: Error: [Callstack] 0x00007ffe0b4fe1e1 UE4Editor-RenderCore.dll!UnknownFunction ]
[2020.02.22-20.40.14:186] 65]LogWindows: Error: [Callstack] 0x00007ffdfc79380f UE4Editor-Core.dll!UnknownFunction ]
[2020.02.22-20.40.14:186] 65]LogWindows: Error: [Callstack] 0x00007ffdfc793644 UE4Editor-Core.dll!UnknownFunction ]
[2020.02.22-20.40.14:186] 65]LogWindows: Error: [Callstack] 0x00007ffe6ac27bd4 KERNEL32.DLL!UnknownFunction ]
[2020.02.22-20.40.14:186] 65]LogWindows: Error: [Callstack] 0x00007ffe6b5cced1 ntdll.dll!UnknownFunction ]
[2020.02.22-20.40.14:186] 65]LogWindows: Error:
[2020.02.22-20.40.14:186] 65]LogWindows: Error: Crash in runnable thread RHIThread
[2020.02.22-20.40.14:207] 65]LogExit: Executing StaticShutdownAfterError
[2020.02.22-20.40.14:207] 65]LogWindows: FPlatformMisc::RequestExit(1)
[2020.02.22-20.40.14:207] 65]LogCore: Engine exit requested (reason: Win RequestExit)
[2020.02.22-20.40.14:250] 65]Log file closed, 02/22/20 15:40:14

This is the error I get when screen freezes on Startup (inside of VS) –>
(Check Attachement)

7

Disable RayTracing in project.

8

How do disable Ray Tracing in the project when I can’t open the project? Every time I try to open it it crashes due to D3D12RHI error… thanks!

9

If there is an error in any element within the map the editor is opening during the editor loading, you can skip the map loading if you edit your DefaultEngine.ini file inside your project’s Config folder and editing the parameter as follows:

Example:
EditorStartupMap=/Game/ThirdPersonBP/Maps/ThirdPersonExampleMap

to:
EditorStartupMap=

With that you will be able to at least open the project without a map loaded at editor. Once there you can change any project settings and restore EditorStartupMap to its previous value. Make sure to have a backup done for the DefaultEngine.ini before changing it!