Unreal Engine 4.14 & 4.15 keep Crashing

Development Programming & Scripting Blueprint
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1

Unreal is continually crashing on me, and causing multiple setbacks on one of my games. Won’t display anything when I Play in the editor, constantly crashing whenever I open up the Blueprint editor, and forcing me to restart some of my progress after each crash since the last time I saved. The previous solution provided to me does not help whatsoever, Unreal Engine Issues and Bug Tracker (UE-41095), and need a new solution. Please help!
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SEGV_MAPERR at 0x3

FGenericPlatformMisc::RaiseException(unsigned int) Address = 0x10d4f944b (filename not found) [in UE4Editor-Core.dylib]
FOutputDeviceMacError::Serialize(wchar_t const*, ELogVerbosity::Type, FName const&) Address = 0x10d6be2d8 (filename not found) [in UE4Editor-Core.dylib]
FOutputDevice::Logf(wchar_t const*, …) Address = 0x10d7a0197 (filename not found) [in UE4Editor-Core.dylib]
FDebug::AssertFailed(char const*, char const*, int, wchar_t const*, …) Address = 0x10d719196 (filename not found) [in UE4Editor-Core.dylib]
ReportMetalCommandBufferFailure(id, wchar_t const*) Address = 0x1432d13cf (filename not found) [in UE4Editor-MetalRHI.dylib]
MetalCommandBufferFailureInternal(id) Address = 0x1433529dc (filename not found) [in UE4Editor-MetalRHI.dylib]
HandleNVIDIAMetalCommandBufferError(id) Address = 0x1432cff15 (filename not found) [in UE4Editor-MetalRHI.dylib]
FMetalCommandBufferFence::Wait(unsigned long long) Address = 0x1433034c1 (filename not found) [in UE4Editor-MetalRHI.dylib]
FMetalDynamicRHI::RHIGetRenderQueryResult(FRHIRenderQuery*, unsigned long long&, bool) Address = 0x143303e87 (filename not found) [in UE4Editor-MetalRHI.dylib]
FetchVisibilityForPrimitives(FScene const*, FViewInfo&, bool, bool) Address = 0x11d947559 (filename not found) [in UE4Editor-Renderer.dylib]
FSceneRenderer::ComputeViewVisibility(FRHICommandListImmediate&) Address = 0x11d8fa73b (filename not found) [in UE4Editor-Renderer.dylib]
FDeferredShadingSceneRenderer::InitViews(FRHICommandListImmediate&, FILCUpdatePrimTaskData&, TArray, TInlineAllocator<4u, FDefaultAllocator> >&) Address = 0x11d8cad22 (filename not found) [in UE4Editor-Renderer.dylib]
FDeferredShadingSceneRenderer::Render(FRHICommandListImmediate&) Address = 0x11d33e7ab (filename not found) [in UE4Editor-Renderer.dylib]
FRendererModule::BeginRenderingViewFamily(FCanvas*, FSceneViewFamily*)::EURCMacro_FDrawSceneCommand::DoTask(ENamedThreads::Type, TRefCountPtr const&) Address = 0x11d8edd10 (filename not found) [in UE4Editor-Renderer.dylib]
TGraphTask::ExecuteTask(TArray&, ENamedThreads::Type) Address = 0x11d9603eb (filename not found) [in UE4Editor-Renderer.dylib]
FNamedTaskThread::ProcessTasksNamedThread(int, bool) Address = 0x10d520571 (filename not found) [in UE4Editor-Core.dylib]
FNamedTaskThread::ProcessTasksUntilQuit(int) Address = 0x10d51c015 (filename not found) [in UE4Editor-Core.dylib]
FTaskGraphImplementation::ProcessThreadUntilRequestReturn(ENamedThreads::Type) Address = 0x10d518891 (filename not found) [in UE4Editor-Core.dylib]
RenderingThreadMain(FEvent*) Address = 0x1134263d4 (filename not found) [in UE4Editor-RenderCore.dylib]
FRenderingThread::Run() Address = 0x113439b97 (filename not found) [in UE4Editor-RenderCore.dylib]
FRunnableThreadPThread::Run() Address = 0x10d578cb3 (filename not found) [in UE4Editor-Core.dylib]
FRunnableThreadPThread::_ThreadProc(void*) Address = 0x10d53aee1 (filename not found) [in UE4Editor-Core.dylib]
_pthread_body Address = 0x7fff90a8099d (filename not found) [in libsystem_pthread.dylib]
_pthread_body Address = 0x7fff90a8091a (filename not found) [in libsystem_pthread.dylib]
thread_start Address = 0x7fff90a7e351 (filename not found) [in libsystem_pthread.dylib]

2

Hi MarshalHouck,

Nvidia have a fix for their driver that partially address this - there is a bug in MetalRHI too that needs resolving but without Nvidia’s fix it won’t stop the crash. This has been slotted to be fixed for UE4.16.

On a Mac, the only way to update Nvidia’s drivers are to update to the latest version of . So, in conclusion, the only way this specific bug is going to be fixed for your system is when you are both running the latest version of that includes the fix from nVidea as well as updating (by opening a copy of your project in UE4.16 -do NOT overwrite your original).

While there is no known workaround for this, I suspect that changing your Preview Rendering Level under “Settings” and Engine Scalability Settings to “Medium” and Material Quality level to “low” may alleviate the problem until then. Both fixes are estimated for 3-4 weeks barring any unforeseen issues.

.