Crash on play if a BP manipulates a InstancedStaticMeshComponent by using a ClearInstances node followed by an AddInstance node.
This is a blocker for the licensee.
This is a regression:
Working in 4.16.2-35114769
Not working in 4.17.0 Preview 1-3528061
Crash reporter: [Link Removed]
Crash reporter callstack links to [Link Removed] as well (https://jira.it.epicgames.net/browse/UE-46263); however, the repo in this JIRA will reproduce after the fix for [Link Removed] went in.
Licensee Description:
We noticed a 100% render thread crash (Unknown RHI vertex element type) since we upgrade to 4.17 preview 1
The crash is caused by ClearInstances followed by AddInstance on the InstancedStaticMeshComponent.
I've attached a sample project so you can investigate.
Currently this is a blocker for us so please advise how to fix it, thanks!
Results: The editor will crash immediately on play
LoginId:a1be990b4855275a6b8acdb5d49d864a EpicAccountId:75f47e038a8442f0af6c18e1f38eeb85 Fatal error: [File:D:\Build\++UE4+Release-4.17+Compile\Sync\Engine\Source\Runtime\Windows\D3D11RHI\Private\D3D11VertexDeclaration.cpp] [Line: 49] Unknown RHI vertex element type 0 UE4Editor_Core!FDebug::AssertFailed() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:349] UE4Editor_D3D11RHI!FD3D11VertexDeclarationKey::FD3D11VertexDeclarationKey() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\windows\d3d11rhi\private\d3d11vertexdeclaration.cpp:53] UE4Editor_D3D11RHI!FD3D11DynamicRHI::RHICreateVertexDeclaration() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\windows\d3d11rhi\private\d3d11vertexdeclaration.cpp:97] UE4Editor_RHI!FDynamicRHI::CreateVertexDeclaration_RenderThread() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\rhi\private\rhicommandlist.cpp:1972] UE4Editor_RHI!FRHICommandListImmediate::CreateVertexDeclaration() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\rhi\public\rhicommandlist.h:2626] UE4Editor_ShaderCore!RHICreateVertexDeclaration() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\rhi\public\rhicommandlist.h:3503] UE4Editor_ShaderCore!FVertexFactory::InitDeclaration() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\shadercore\private\vertexfactory.cpp:301] UE4Editor_Engine!FInstancedStaticMeshVertexFactory::InitRHI() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\engine\private\instancedstaticmesh.cpp:449] UE4Editor_RenderCore!FRenderResource::InitResource() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\rendercore\private\renderresource.cpp:33] UE4Editor_RenderCore!TGraphTask<`BeginInitResource'::`2'::EURCMacro_InitCommand>::ExecuteTask() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\core\public\async\taskgraphinterfaces.h:784] UE4Editor_Core!FNamedTaskThread::ProcessTasksNamedThread() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\core\private\async\taskgraph.cpp:650] UE4Editor_Core!FNamedTaskThread::ProcessTasksUntilQuit() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\core\private\async\taskgraph.cpp:559] UE4Editor_RenderCore!RenderingThreadMain() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\rendercore\private\renderingthread.cpp:325] UE4Editor_RenderCore!FRenderingThread::Run() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\rendercore\private\renderingthread.cpp:459] UE4Editor_Core!FRunnableThreadWin::Run() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\core\private\windows\windowsrunnablethread.cpp:76]
i have this problem UE4CC-Windows-58DC12AF4B97F057BD108FBFF569B2E9_0000
Delay nodes occasionally don't fire the "Completed" output in a nativized build
Undefined sysmbol: typeinfo for AActor when cross-compile linux dedicated server on windows
I am not able to find world outliner how to enable it?
An error occurred while trying to generate project files !?
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-47607 in the post.
| 2 |
| Component | UE - Graphics Features |
|---|---|
| Affects Versions | 4.17, 4.18 |
| Target Fix | 4.17 |
| Created | Jul 21, 2017 |
|---|---|
| Resolved | Jul 25, 2017 |
| Updated | Apr 27, 2018 |