Unreal Engine Issues
Unreal Engine Issues
[CrashReport] Failed assert during BP compilation (trying to call a default delegate) (UE4Editor_KismetCompiler!FScriptBuilderBase::EmitFunctionCall() [kismetcompilervmbackend.cpp:1216])
UE - Gameplay - Oct 27, 2017This is a trending crash coming out of the 4.18 release. User DescriptionsI tried to call an Event Dispatcher (which is assigned in the Level Blueprint) in the Construction Script of the Blueprint ...
[CrashReport] UE4Editor-MetalRHI.dylib!FMetalRHICommandContext::RHISetShaderUniformBuffer()
UE - Graphics Features - Jul 6, 2017This is a common Mac crash User DescriptionsEnabling Volumetric Translucent Shadow for an object with Translucent Material and Forward Shading always crashes on MacOS Sierra , Unreal 4.13 Callstac ...
Landscape cooked heightmap and Physical Material mismatch
UE - LD & Modeling - Terrain - Landscape - Jun 19, 2015Several users have reported crashes where the Heightfeild loaded from the DDC and physical material list do not match. Suggest adding the number of physical materials to part of the cooked heightma ...
[CrashReport] UE4Editor_VulkanRHI!VulkanRHI::VerifyVulkanResult() [vulkanutil.cpp:357]
UE - Graphics Features - Nov 10, 2017This is a low frequency crash that has occurred since at least 4.14 User DescriptionsStarted with vulkan.. crashed immediately.Activated vulkan, and moved around. Only that.I imported a 3d model in ...
Failed check() when placing large numbers in to a From Seconds node and print them to the screen
UE - Gameplay - Blueprint - Apr 10, 2017Crash when placing a number >= 922337181697 in to a From Seconds node and print them to the screen ...
Placing 'Groom' asset into scene results in assertion failed
UE - Graphics Features - Feb 10, 2020Dragging a groom asset into the level results in a crash. Link to Project: [Link Removed] Tested in: 4.25 CL#11223911 ...
Mutable constant texture variable with ClipUV mask only works with new experimental dynamic variable is connected as well
UE - Anim - Mutable - Sep 22, 2025We are attempting to use Mutable in 5.6.1 and have encountered an issue which we are not sure how to resolve. The issue occurs when using the ClipWithUVMask node. In short we have a customizable o ...
[CrashReport] UE4Editor_Engine!FUniformExpressionSet::CreateUniformBuffer() [materialuniformexpressions.cpp:354]
UE - Graphics Features - Nov 30, 2015Error Message - Assertion failed: !Value || Value->IsValidLowLevel() [File[Image Removed]:\BuildFarm\buildmachine_++depot+UE4-Releases+4.10\Engine\Source\Runtime\Engine\Private\Materials\MaterialU ...
[CrashReport] Fatal error: Cast of nullptr to Object failed
UE - Gameplay - Oct 5, 2017This is a common and longstanding crash that has affected many users since at least 4.11. Source context not available (error in user code?). User DescriptionsI was duplicating a Set function in c ...
Setting spline in Niagara Override Parameters corrupts system after closing level
UE - Niagara - Mar 19, 2019The USplineComponent appears to be corrupted. It will pass the null check, but operations done on the data cause the engine to crash. (See the linked UDN for more details) ...