Unreal Engine Issues

Attempting to set skeletal mesh on vehicle blueprint during PIE crashes editor

Switching the skeletal mesh of an actor during PIE crashes the editor. Frequency: 5/5 Crashreporter: N/A ...

Crash Occurs When One Morph Target is Deleted and Another is Adjusted Afterward

Engine crashes when a morph target on an asset that has multiple morph targets is deleted and then another morph is adjusted afterwards Notes: Asset came from an older Jira where this same issue o ...

Assert when adding geometry cache asset as a component to a blueprint actor

When adding an asset directly to a blueprint, it is not in the streaming components, so the assertion fails when setting the geometry cache. ...

pose search cook determinism issue

Animation System relies on FindFunctionByName which is not thread safe.

Currently, there are several places in FAnimInstanceProxy and FAnimNode_Base (and derived classes) that rely on FindFunctionByName in order to resolve transitions, evaluate pins, etc. This can happ ...

Editor Crashes When Using Set Replicates in the Construction Script

When spawning an actor using the Spawn Actor From Class node that has a Set Replicates node in the construction script, the editor crashes upon attempting to run a dedicated server with 2 players. ...

Crash accessing USplineComponent from Niagara while it is being updated on game thread

I was working with a licensee on something unrelated, and ran into this niagara threading crash. It looks like UNiagaraDataInterfaceSpline::SampleSplinePositionByUnitDistance on one of the niagara h ...

Duplicating a map crashes the editor (Blueprint compile crash)

EDIT: Date: 1/21/2015 Adding the [Link Removed] Duplicating a map in the Content Browser crashes the editor. It does not matter if the map being duplicated is the currently open map or not. EDIT ...

Crash in FObjectReplicator::StartReplicating when removing replicated uproperty and hot reloading with two players

The editor crashes when the user removes the replicated uproperty from a variable and tries to hot reload while a PIE session with two players is still active. This issue was found while trying to ...

Crash can occur when calling GetSkinnedVertexPosition on a skeletal mesh with a slightly different bone hierarchy than the skeletal mesh whose skeleton it is using

MDW: In progress (Dev-AnimPhys CL 3392820) When calling GetSkinnedVertexPosition on a skeletal mesh that uses the same skeleton as a different skeletal mesh with a slightly different bone hierarchy ...