Unreal Engine Issues
Unreal Engine Issues
Crash rendering image sequence if the Sub-Level with matinee is not loaded
Tools - Apr 15, 2016Crash rendering image sequence if the Sub-Level containing the matinee is not loaded. This seems to go away if the level is either set to "Always Loaded". Seems to be a result of people not switch ...
Material slot assignment incorrect after mesh reduction completely removes all triangles from a section
When mesh reduction results in a section becoming empty, the material slots are incorrectly assigned. e.g. if section 0 gets removed due to it having no triangles after reduction, then its material ...
Compile on load crashes for classes within an abstract class
UE - Gameplay - Blueprint Compiler - Feb 20, 2021When compiling on load in -game, a blueprint class that inherits from a native class that is marked within and the class that it is within is abstract, a crash will occur when FBlueprintCompilationM ...
When painting on a landscape with edit layers, there are UV distortions happening across the boundaries of paint layers when material is using SetMaterialAttributes
UE - Graphics Tools - Terrain - Landscape - Mar 10, 2025Context Landscape Edit Layers enables users to paint landscapes using non-destructive layers, and can add multiple layers to the landscape that can be edited independently from each other. Problem ...
"Error Provision not found" even though the provision is present and valid in 4.13.1
UE - Platform - Mobile - Oct 31, 2016A few users are reporting on the Answer Hub and in the Forums that they are getting the following error in their output logs: "Error Provision not found" even though the provision is present and va ...
IAP fails (in-game) on iOS Match3
UE - Online - Aug 28, 2018The device this was tested on is 4987_iPhone 6+_11.2 The live build didn't provide UE4 logging, but that will be added. There is also a failure to purchase on Android but it gets farther than this ...
Soft angular constraints solve velocity like hard constraints
UE - Runtime - Simulation - Jul 17, 2025Soft angular constraints are solving velocity like hard constraints. Instead of swinging back and forth, the affected body just snaps to 45 degrees. Check the steps to reproduce for more details. Th ...
Starting position of physics simulated bp is different in Standalone Game
UE - Simulation - Physics - Feb 26, 2016Starting position of physics simulated bp is different in Standalone Game User Description: Things work fine in the editor window, but when I run a standalone game then blueprints with physics bod ...
Get Random Point In Radius does not return certain vectors
UE - AI - Mar 25, 2015https://answers.unrealengine.com/questions/198619/get-random-point-in-radius-does-not-work-properly.html "Get Random Point In Radius" will leave one square sector empty. Seems like it creates patch ...
Simulated ability tasks not being cleaned up in UActorChannel::ReplicationMap
UE - Networking - Nov 20, 2018I've noticed the issue occurring in both 4.20.3 (CL 4369336) and 4.21.0 (CL 4541578). The user on AnswerHub has also noticed the issue in 4.20.2 (CL unknown) and claims the issue did not occur in 4. ...