Unreal Engine Issues

Package Failed with VS2019

Error Log: UATHelper: Packaging (Windows (64-bit)): CSC : warning CS1685: The predefined type 'System.Runtime.CompilerServices.ExtensionAttribute' is defined in multiple assemblies in the global al ...

The ChaosCacheManager changes the bSimulatePhysics flag from the ObservedComponents and, if deleted, the change will persist, what can lead to confusion as observed physical entities will inadvertently stop simulating physics

The ChaosCacheManager (CCM) changes the bSimulatePhysics flag from the ObservedComponents and, if deleted, the change will persist, what can lead to confusion as observed physical entities will inad ...

[CrashReport] Assertion failed: !IsLoading() in CollectGarbageInternal()

This is a common crash occurring for users in the 4.16 release. It is spread out across many different CrashGroups with slight variations in callstack. Users have not provided any descriptions whe ...

Editor crash when saving a level instance in a folder with the same name as the level

Apex Cloth disappears when Setting Custom Time Dilation to Zero

Apex Cloth assets disappear if you set the Custom Time Dilation to 0.0. You can workaround the issue by setting the Custom Time Dilation to 1.0, and then use the 'Force Cloth Next Update Teleport a ...

Shader compiler errors when using enclosed local variables in a material while ray tracing is enabled

A licensee is seeing an issue with a couple of post process materials after enabling ray tracing. While the materials presenting the issue fail to compile for different reasons, they both refernce t ...

A welded hierarchy blocks updates to collision settings on all but the root primitive. Calling SetCollisionResponseToChannel on the children won't work.

A welded hierarchy blocks updates to collision settings on all but the root primitive. Calling SetCollisionResponseToChannel on the children won't work. The licensee noticed that IPhysicsProxyBase* ...

Shortcut(Function, Add a new function graph) leads to crash in the MacroLibrary editor.

Shortcut will still led to create a new function in the macro library. and this makes engine crash with following callstack. Assertion failed: Blueprint->BlueprintType != BPTYPE_MacroLibrary [Link ...

Ensure triggered inside Range Struct Customization when Property Node is no longer valid (e.g. when editing FFloatRange while FRuntimeFloatCurve editor is visible) [Ref. UE-341339]

[Link Removed] was fixed by CL 46990575, successfully avoiding an ensure condition inside FIntervalStructCustomization::SetValue() when its Property Node is no longer valid. However, the same proble ...

Crash when building lighting with a skylight that draw lit translucent material

A common crash affecting many users in 4.17.0 ...