Unreal Engine Issues
Unreal Engine Issues
Packaging for ARM 32 bit fails during build phase with libopenvr_api.so: file not recognized
Tools - May 8, 2017This is the ouput in the UnrealBuildTool log:[301/301] Link ThirdPersonServer D:/GitHub-Release-4.16/3427662/Engine/Source/ThirdParty/OpenVR/OpenVRv1_0_6/lib/linux64/libopenvr_api.so: file not reco ...
[CrashReport] UE4Editor_InputCore!FKey::FKey()
UE - Editor - UI Systems - Slate - Nov 1, 2017This is a trending crash coming out of the 4.18 release. It may be a regression as there are no records of it occurring in 4.17. Users have not provided any descriptions of their actions when the c ...
[CrashReport] UE4Editor_ImageCore!CopyImage() [imagecore.cpp:144]
UE - Graphics Features - Mar 27, 2018No user comments on crash group 135 case ERawImageFormat::BGRA8: 136 { 137 const FColor* SrcColors = SrcImage.AsBGRA8(); 138 for (int32 TexelIndex = 0 ...
BP-implemented BT decorators end up thinking they're not on active branch
UE - AI - Mar 13, 2015This issue makes BP BT decorators not being able to run condition checking every tick. The core issue is here: bool UBTDecorator_BlueprintBase::GetShouldAbort(UBehaviorTreeComponent& OwnerComp) co ...
[CrashReport] UE4Editor_SlateCore!FSlateElementBatcher::AddElements() [elementbatcher.cpp:52]
UE - Editor - UI Systems - Slate - Nov 21, 2017This is an infrequent crash coming out of the 4.18 release. Users have not provided any descriptions of their actions when the crash occurred. Based on affected project names, this may be a VR is ...
Blueprint Array/Map properties with DefaultToInstanced types are not instanced properly
UE - Gameplay - Blueprint - May 6, 2019At a licensee, I discovered a problem where Blueprint-created array and map properties are not correctly propagating the ContainsInstancedReferenced property flag. This means that if you create a Ma ...
DrawDebugString display wrong position in PIE when changed display scale
Tools - Sep 16, 2020The display position of the text in DrawDebugString is affected by the scale of the display. Should refer to the Project() of DebugCanvas (not Canvas). - Suggest Code void AHUD::DrawDebugTextL ...
Missing SmallOSAlloc/Free memory tracking with LLM on iOS
UE - Platform - Mobile - Dec 11, 2020Licensee reports missing memory tracking for LLM on iOS: In Engine/Source/Runtime/Core/Private/HAL/MallocBinned.cpp in SmallOSAlloc, there is a compiler define for IOS and within it there is an LLM ...
AsyncSaveGameToSlotForLocalPlayer does not properly handle multiple requests
UE - Gameplay - Nov 14, 2025ULocalPlayerSaveGame::AsyncSaveGameToSlotForLocalPlayer was designed to properly support multiple in flight requests at the same time, but the current code does not work correctly and this can cause ...
Editor Crashes When Reopened Project's Level that Contains Vertex Painted Asset is Opened
Tools - Apr 17, 2018Editor crashes when asset is imported in as a skeletal mesh, brought into a level, vertex painted using the paint tab under modes, all assets are saved, project is reopened, then level is reopened. ...