Unreal Engine Issues

Race condition in full builds of UE4 engine source

This is a race condition caused by how "Clean.bat", a batch file used during rebuilds, tries to manually rebuild the UnrealBuildTool project when it runs. This causes a spam of UnrealBuildTool build ...

Compilation error when using Particle SubUV in Niagara Mesh Particles with Raytracing enabled.

The licensee has shared the following workaround for modifying NiagaraMeshVertexFactory.ush. struct FVertexFactoryInterpolantsVSToPS { TANGENTTOWORLD_INTERPOLATOR_BLOCK #if USE_PARTICLE_SUBU ...

[CrashReport] UE4Editor-MetalRHI!FMetalCommandEncoder::SetShaderTexture(mtlpp::FunctionType, FMetalTexture const&, unsigned long, mtlpp::ResourceUsage) [MetalCommandEncoder.cpp:1702]

Generated from CrashReporter ...

Physics Constraint Actor: When plasticity is enabled, Drive Position Target is reset to zero on constraint initialization

When a Chaos joint constraint is first created, having linear/angular plasticity enabled will unexpectedly force its linear/angular drive position target to zero on initialization, disregarding the ...

[CrashReport] UE4Editor-MetalRHI!FMetalCommandBufferDebugHelpers::TrackResource(id<MTLCommandBuffer>, objc_object*) [MetalCommandBuffer.cpp:147]

Generated from CrashReporter ...

Adding a section with mesh editor mode lead to a staticmesh editor crash

Mobile Previewer: Safe Zone Invalid Until Window Resize

When the Mobile Previewer loads, the Safe Zone widget is not working properly at startup, and requires a window resize to update to the correct Safe Zone. ...

Using dynamic bindings in a code class will result in the bindings becoming a permanent part of any Blueprint created from that class if a hot reload is performed.

If dynamic bindings are being used in a custom code class from which Blueprints are derived, any hot reload will make the bindings a permanent part of the Blueprint and they cannot be removed or cha ...

[CrashReport] UnrealEditor-MetalRHI!FMetalRHIBuffer::FMetalRHIBuffer(unsigned int, EBufferUsageFlags, EMetalBufferUsage, ERHIResourceType) [MetalVertexBuffer.cpp:152]

Generated from CrashReporter ...

Internal Compile error received from rearranging Format Text nodes

Internal Compile error received from rearranging Format Text nodes Output Log of Error: LogBlueprint:Error: [compiler] Error Internal compiler error inside CreateExecutionSchedule (site 2); please ...