Unreal Engine Issues
Unreal Engine Issues
[CrashReport] Assertion failed: !bIsReentrant - UE4Editor-UnrealEd.dylib!SaveWorld()
UE - Platform - Apple - Jul 27, 2017This is a common crash on Mac in 4.16 and has occurred since at least 4.14. User DescriptionsI added a character to a blank map and tried to save it. Callstack from LogLogEditorViewport: Clicking ...
[CrashReport] UE4Editor-Slate.dylib!FMenuStack::PostPush(TSharedPtr<IMenu, (ESPMode)0>, TSharedRef<FMenuBase,()
Tools - Dec 1, 2017This is a longstanding but infrequent Mac crash that has occurred since at least 4.15. Users have not provided any descriptions. Callstack from Log[2017.11.19-04.18.41:283][ 0]LogSlate: Took 0.000 ...
Race condition in USkeletalMeshComponent::TickCloth due to delayable tick function.
UE - Simulation - Physics - Character - Aug 1, 2016USkeletalMeshComponent::TickComponent is run in the PrePhysics tick group. This is the only place where the SkeletalMesh is actually checked to be != nullptr to determine whether or not the TickClot ...
UE 5.5 delayed Python initialization causes issues
UE - Editor - Workflow Systems - Oct 28, 2024From this UDN: [Link Removed] The customer reports that this issue did not happen in 5.4. ...
FX.TestGPUSort fails on Vulkan
UE - Niagara - May 5, 2025“FX.TestGPUSort” fails on both PC Editor and Android with Vulkan RHI. ...
Ensures for Pixel and Vertex Shaders occur when running TM-ShaderModels with -onethread
UE - Graphics Features - Jan 20, 2017Two ensures fire when opening the TM-ShaderModels Map in QAGame with the -onethread argument. The callstacks look identical with the exception that one is for a pixel shader and the other is for a v ...
[CrashReport] UnrealEditor-LevelEditor!FViewportClient::InputKey(FInputKeyEventArgs const &) [UnrealClient.h:851]
UE - Editor - Workflow Systems - May 27, 2021Generated from CrashReporter ...
[CrashReport] UE4Editor-D3D12RHI!FD3D12DescriptorCache::SetConstantBuffers<0>(FD3D12RootSignature const *,FD3D12ConstantBufferCache &,unsigned short const &) [D3D12DescriptorCache.cpp:752]
UE - Rendering Architecture - RHI - Apr 12, 2019Generated from CrashReporter ...
Build All Levels fails with duplicate level instances
UE - World Creation - Worldbuilding Tools - Level Instances - Jan 24, 2024Allow having TArray with index size using 64 bits instead of 32 bits
UE - Foundation - Core - Apr 27, 2018With the geometry data getting bigger and bigger we hit more often the int32 limits of the default TArray. All geometry data is store in array so we cannot have more then 2GB of vertexinstances or t ...