Steps to Reproduce

REPRO STEPS:

  1. Load QAGame in the editor
  2. Click Import from the Content Browser
  3. Navigate to \Engine\Content\NotForLicensees\QA\Import_Test_Assets\AlembicAssets and select SceneTest.abc, then click Open
  4. Change the Import Type to Skeletal Mesh
  5. Click Import

RESULT:
Editor crashes.

Callstack
Assertion failed: SoftVertices.Num() == 0 || SoftVertices.Num() == NumVertices [File:E:\UE4_Release-413\Engine\Source\Runtime\Engine\Public\SkeletalMeshTypes.h] [Line: 406]
UE4Editor_Engine!FSkeletalMeshSceneProxy::GetDynamicElementsSection() skeletalmesh.cpp:5301 
UE4Editor_Engine!FSkeletalMeshSceneProxy::GetMeshElementsConditionallySelectable() skeletalmesh.cpp:5123 
UE4Editor_Engine!FSkeletalMeshSceneProxy::GetDynamicMeshElements() skeletalmesh.cpp:5068 
UE4Editor_Renderer!FSceneRenderer::GatherDynamicMeshElements() scenevisibility.cpp:1895 
UE4Editor_Renderer!FSceneRenderer::ComputeViewVisibility() scenevisibility.cpp:2561 
UE4Editor_Renderer!FDeferredShadingSceneRenderer::InitViews() scenevisibility.cpp:2795 
UE4Editor_Renderer!FDeferredShadingSceneRenderer::Render() deferredshadingrenderer.cpp:571 
UE4Editor_Renderer!RenderViewFamily_RenderThread() scenerendering.cpp:1849 
UE4Editor_Renderer!TGraphTask<`FRendererModule::BeginRenderingViewFamily'::`21'::EURCMacro_FDrawSceneCommand>::ExecuteTask() taskgraphinterfaces.h:868 
UE4Editor_Core!FNamedTaskThread::ProcessTasksNamedThread() taskgraph.cpp:932 
UE4Editor_Core!FNamedTaskThread::ProcessTasksUntilQuit() taskgraph.cpp:679 
UE4Editor_RenderCore!RenderingThreadMain() renderingthread.cpp:319 
UE4Editor_RenderCore!FRenderingThread::Run() renderingthread.cpp:440 
UE4Editor_Core!FRunnableThreadWin::Run() windowsrunnablethread.cpp:74

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Fixed
ComponentGameplay
Affects Versions4.13
Target Fix4.13
Fix Commit3080814
Main Commit3092051
Release Commit3080814
CreatedAug 5, 2016
ResolvedAug 8, 2016
UpdatedApr 27, 2018