Unreal Engine Issues

Flat Tessellation broken on DX12 renderer

Behavior reproduced in 4.17.2 CL 3658906, 4.18.3 CL 3832480 and 4.19.P4 CL 3873914 To run the engine with DX12 I made a shortcut of the UE4Editor.exe found at D:\Epic Games\UE_4.18\Engine\Binaries\ ...

Assert when compilling blueprint with interface implemented

StaticMesh reimport: socket List not refresh if the count is the same

[CrashReport] UE4Editor_CoreUObject!FWeakObjectPtr::operator=() [weakobjectptr.cpp:28]

This Jira was created from CrashReports submitted by the public due to the high number of occurrences. Error message: Access violation - code c0000005 (first/second chance not available) Source C ...

[CrashReport] libUE4Editor-VulkanRHI.so!FVulkanCommandListContext::RHIDrawIndexedPrimitive(FRHIIndexBuffer*, int, unsigned int, unsigned int, unsigned int, unsigned int, unsigned int) [VulkanCommands.cpp:818]

Generated from CrashReporter ...

Motion Matching: Check failure when adding sequence into DB that references a niagara emitter

The serialization code for the motion matching database has a check that will fail if a property has the IgnoreForMemberInitializationTestName meta tag.  Niagara emitters contain a property that has ...

[CrashReport] UE4Editor_Engine!FAnimCurveBase::SetCurveTypeFlag() [animcurvetypes.cpp:18]

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: Access violation - code c0000005 ( ...

Project fails to build for iOS from Windows when Generate .uedebugsymbols is enabled

This does not occur in 4.18.3 at CL 3823254UATHelper: Packaging (iOS): ERROR: System.IO.DirectoryNotFoundException: Could not find a part of the path 'D:\Epic Games\UE_4.19\Engine\Binaries\ThirdPa ...

Virtual Production Template - Blank Template under Film, Television, and Live Events has AJA/BlackMagic plugins enabled by default on unsupported platform

[AI] Behavior Tree gets stuck in an infinite loop if a Conditional Loop decorator cannot find a child node to run

Behavior Tree can be stuck in an infinite loop with a Conditional Loop that cannot run any child nodes. Exception thrown at 0x00007FFC0E405F65 (UnrealEditor-AIModule.dll) in UnrealEditor.exe: 0xC ...