Unreal Engine Issues
Unreal Engine Issues
In Packaged builds, Chaos Cache Manager can't animate Geometry Collections with Nanite Enabled if Cache Mode is set to Static Pose
UE - Simulation - Physics - Destruction - Feb 27, 2025In Packaged builds, Chaos Cache Manager (CCM) can't animate Geometry Collections (GC) with Nanite Enabled if Cache Mode is set to Static Pose. The licensee tried to animate a CCM using Sequencer onl ...
MDL imported from Substance Source with Datasmith causes a crash
UE - Editor - Content Pipeline - Import and Export - Mar 8, 2019MDL downloaded from Substance Source causes a crash. This is reported on UDN by an Enterprise customer: https://udn.unrealengine.com/questions/487598/why-would-ue4-is-always-crashing-when-import ...
FAnimationRuntime::BlendPosesPerBoneFilter() causes an assertive crash when Skeletal Mesh LOD is changed
UE - Anim - Runtime - Nov 1, 2023The crash occurs from "check(BoneBlendWeights.Num() == NumBones);" This crash occurs when the following conditions are met;The skeletal mesh LOD is changed.The number of bones is difference between ...
Creating a control rig via FControlRigBlueprintActions::CreateNewControlRigAsset crashes
UE - Anim - Rigging - Control Rig - Nov 10, 2023FControlRigBlueprintActions::CreateNewControlRigAsset is crashing in ResolveObjectHandleNoRead. Looking at the control rig in UControlRigBlueprint::Serialize, it's marked as pendingkill but I'm uns ...
Crash when generating proxy mesh
Tools - Jul 12, 2019Generating a proxy mesh with imported models and the simplify mesh flag set to true causes the editor to crash. Tested in 4.21.2 (CL - 4753647), 4.22.3 (CL - 7053647), 4.23 (CL - 7288428), 4.24 (CL ...
Crash when executing Rename Asset or Duplicate Asset and other functions in Scripted Actions
UE - Gameplay - Blueprint - Jan 8, 2019In Scripted Actions, if you execute a function after using Rename Asset or Duplicate Asset, it will crash. If you do not execute the function it will not crash. ...
Take Recorder crashes if actor with animation despawns during recording
UE - Anim - Sequencer - Mar 8, 2021Skeletal animations are finalized at the end of recording, and expect the actor to still be around, but actors can despawn during recording leading to a crash. ...
Changing reflection capture resolution after setting preview rendering level to Android ES3.1 crashes the editor
UE - Graphics Features - Nov 20, 2019Applying a new reflection capture resolution after changing Preview Rendering Level to Android ES3.1 results in crash. Tested in: 4.24 P3 CL#10283392 4.25CL#10303496 ...
Level asset "Diff against depot" opens P4 Merge tool
UE - World Creation - Worldbuilding Tools - Mar 1, 2024You can right click a level asset in the editor's Content Browser and do the action Source Control > Diff against Depot. However, this does not provide a useful diff window. It currently opens the d ...
Copying a Folder that contains the space character from the Outliner does not enclose the Folder name on Double Quotes. Because of that, later Pasting will only handle the first word of the Folder name.
UE - World Creation - Worldbuilding Tools - Jun 10, 2025Copying a Folder that contains the space character from the Outliner does not enclose the Folder name on Double Quotes. Because of that, later Pasting will only handle the first word of the Folder n ...