Unreal Engine Issues

Crash when merging Skeletal Mesh with incomplete LOD streaming

SummaryMerging a Skeletal Mesh whose LOD streaming has not completed crashes with an AccessViolation while the vertex copy reads the Null buffers of LODs that have not been streamed inRoot cause is ...

[CrashReport] GPU Hang on Linux - /usr/lib/nvidia-381/libGLX_nvidia.so.0

This is a trending GPU hang crash on Linux in 4.16 and 4.17. It is similar to [Link Removed] (nvidia-375) ...

Crash when Undo after deleting a Material Layer of a Material Instance.

In Unreal Engine version 5.5.4, the Editor crashes when performing Undo after deleting a Material Layer of a Material Instance ...

Exporting a spawnable through Python doesn't work

CppCompileWarningSettings.NonInlinedGenCppWarningLevel messages should contain Warning\Error

The messages emitted when CppCompileWarningSettings.NonInlinedGenCppWarningLevel is set to Warning\Error should contain the literal so the tools pick them up and react accordingly. From the EPS c ...

Crash importing morph targets with animation and opening it in animation editor

Lina encountered a crash when importing the attached FBX file with morph targets and animation, and then opening it in the animation editor. I was not able to reproduce this issue in QAGame (her re ...

Crash on Package When Using Nativizing Animation Blueprint Has AnimGraph Connected with Enum

If an AnimNode connected with Enum and AnimBP is nativized, the package will occur crash. Following settings is solve this issue. [BlueprintNativizationSettings] +ExcludedBlueprintTypes=/Script/En ...

Need addElement and addElements to allow single insertion instead of to all elements with matching tag

Since multiple dict tags can be in a plist, not just the top level, need to be able to specify to only insert once. Adding an optional once="true" attribute to these commands in UPL will allow this ...

Actor Component properties can become "linked" across multiple Blueprints after a hot reload

If code in an Actor Component class is changed (eg. a new UPROPERTY is added) and a hot reload is performed to implement the changes, the properties in the component can become linked across any Blu ...

State Machine events "Left State Event" and "Fully Blended State" not firing when animation is sequence is playing

State Machine events "Left State Event" and "Fully Blended State" not firing when animation is sequence is playing at the moment you enter/leave the state. ...