Unreal Engine Issues
Unreal Engine Issues
Crashes when attempting to use an Instanced Struct inside Control Rig / Rig VM
UE - Anim - Rigging - Control Rig - Mar 17, 2025Currently, the Control Rig Editor allows the user to use the "Instanced Struct" type, for example for a variable or function input/output. However, this type does not seem to be properly supported ( ...
Crash when saving a Data Table that is referencing itself in a Data Table Row Handle
Tools - Feb 23, 2017Crash when saving a Data Table that is referencing itself in a Data Table Row Handle. Reopening the project also causes a crash. *Regression: Yes This was fixed and working in 4.13-3037605 This i ...
Niagara Scalability Crash When Processing Significance
UE - Niagara - Jun 4, 2025Method FNiagaraScalabilityManager::ProcessSignificance() iterates on indices from Context.SignificanceIndices and uses them to access the State and ManagedComponents arrays. It can then decide to cr ...
Attempting to build lighting in project crashes editor
UE - LD & Modeling - Terrain - Landscape - May 18, 2016Attempting to build lighting in user's project crashes editor. Frequency: 3/3 CrashReporter: N/A ...
Crash on Exiting or Starting PIE with Weight Blended Landscape on ES2 Preview Level
UE - LD & Modeling - Terrain - Landscape - Oct 8, 2015When you are in Rendering Preview Level ES2 (Mobile/HTML) and have a level which has a landscape with weight-blended layered material painted on, PIE will crash on Start of or Exit from. [Link Remo ...
Crash when using a Self reference with a Custom Event variable
UE - Gameplay - Blueprint - Jan 19, 2017Crash when using a Self reference with a Custom Event variable that is using Pass By Reference. The crash only seems to occur if the setup was created in the Player Controller class. This was origi ...
MAC: Crash summoning context menu
UE - Platform - Apple - Jan 6, 2015Crashes only happends on projects that are almost done(2 projects and both are BP only), does not crash when start new project. Log is upload on pastebin, link to log: [Link Removed] ...
Assertion failed: (Index >= 0) & (Index < ArrayNum) when importing large Alembic file
UE - Editor - Content Pipeline - Datasmith - Importer - May 3, 2022Regression testing done on //UE4/Release-4.27.2 CL-18427296 and this issue did occur. [Link Removed] [Link Removed] Below is snips of customers description and proposed workaround:Importing alembi ...
Having lots of SpeedTrees loaded in/out/in with level streaming causes crash with Standalone game
UE - Foundation - Core - Jan 21, 2015Description: When using lots of static meshes placed in the scene and using level streaming to switch levels out can cause standalone game to crash while loading the map back in. For example, if you ...
Imported heightmaps with 2x2 sections crash editor
UE - LD & Modeling - Terrain - Landscape - Jul 18, 2016Importing a heightmap with 2x2 segments seems to cause the editor to crash in 3 different instances: 1. Importing the same 2x2 segment landscape a second time after deleting the first instance 2. ...