Unreal Engine Issues

Crash on attempt to clear(NullifyInstance) of duplicated Hierachial Instanced Static Mesh

When creating an C++ Actor with a Hierarchical Instanced Static mesh. when duplicating such an actor with mesh instances, the instances are not visible on the level. In this state, calling HISM comp ...

[CrashReport] UE4Editor_Engine!FMaterialShaderMap::GetMeshShaderMap() [materialshader.cpp:2197]

This Jira was created from CrashReports submitted by the public due to the high number of occurrences. Descriptions from users are provided below. Error message: Assertion failed: (Index >= 0) & ( ...

[CrashReport] UE4Editor_AudioEditor!`FSoundSubmixGraphSchemaAction_NewNode::StaticGetTypeId'::`2'::$TSS0()

Error message: Access violation - code c0000005 (first/second chance not available) Source Context: 79 auto RenderCommand = [=](FRHICommandListImmediate& RHICmdList){ 80 81 ...

Blueprint reinstancing can duplicate delegate bindings from the reinstanced Blueprint Actor to another referenced Actor instance in the current scene.

This issue occurs because post-BP compile reinstancing does not clear delegate bindings to other referenced Actor instances in the scene. Thus, the old BP actor instance remains in the referenced Ac ...

Virtual Joystick + Swipe to Look = Choppy camera movement on newer iOS devices

User Submitted Video: [Link Removed] User Description: "Swipe to look (with only the left virtual gamepad joystick) is undoubtedly the established gold standard for 3D First Person mobile games. ...

Anim notify issue with root motion replication

https://udn.unrealengine.com/questions/510965/view.html ...

Editor crashes when replacing Packed Level Actor assets during asset deletion process

iOS Shipping Build using std::thread crashes on launch

A user is reporting that using the following code in a GameMode class causes shipping iOS packages to crash on launch:void ANOGSSDKGameModeBase::StartPlay() { std::thread([](){ std::clog << "THRE ...

[CrashReport] UE4Editor_CoreUObject!UObject::CreateDefaultSubobject() [obj.cpp:118]

Was created from CrashReports submitted by the public due to the high number of occurrences. Descriptions from users are provided below. Error message: Fatal error: [Link Removed] [Line: 117] No o ...

[CrashReport] Crash on Mac during Editor load (out of memory loading Boot.ddc): Assertion failed: A.ArrayNum >= 0

This is a common crash occurring for Mac users in the 4.16 release. It appears to occur during editor startup. The below details are taken from user log files.LogFileManager:Error: Requested read of ...