Unreal Engine Issues and Bug Tracker (UE-34377)

Description

This will occur when changing between all Import Types (so long as Create Materials is checked). The callstacks are slightly different depending on which Import Type you switch to.

[Link Removed]

Steps to Reproduce

REPRO STEPS:

Load QAGame in the editor
Click Import from the Content Browser
Navigate to \Engine\Content\NotForLicensees\QA\Import_Test_Assets\AlembicAssets and select MaterialImportTest.abc, then click Open
Select Import Type Static Mesh
Scroll down and check Create Materials
Click Import
Click Import from the Content Browser again
Navigate to \Engine\Content\NotForLicensees\QA\Import_Test_Assets\AlembicAssets and select MaterialImportTest.abc, then click Open
Change the Import Type to Geometry Cache (and ensure Create Materials is still checked)
Click Import

RESULT:
Editor crashes

Callstack

Access violation - code c0000005 (first/second chance not available)
UE4Editor_Engine!UMaterialInterface::GetRelevance_Concurrent() materialinterface.cpp:116 
UE4Editor_Engine!UMeshComponent::GetMaterialRelevance() meshcomponent.cpp:87 
UE4Editor_GeometryCache!FGeometryCacheSceneProxy::FGeometryCacheSceneProxy() geometrycachesceneproxy.cpp:10 
UE4Editor_GeometryCache!UGeometryCacheComponent::CreateSceneProxy() geometrycachecomponent.cpp:155 
UE4Editor_Renderer!FScene::AddPrimitive() rendererscene.cpp:633 
UE4Editor_Engine!UActorComponent::RecreateRenderState_Concurrent() actorcomponent.cpp:1202 
UE4Editor_GeometryCacheEd!FGeometryCacheThumbnailScene::SetGeometryCache() geometrycachethumbnailscene.cpp:39 
UE4Editor_GeometryCacheEd!UGeometryCacheThumbnailRenderer::Draw() geometrycachethumbnailrenderer.cpp:29 
UE4Editor_UnrealEd!ThumbnailTools::RenderThumbnail() objecttools.cpp:3816 
UE4Editor_UnrealEd!FAssetThumbnailPool::Tick() assetthumbnail.cpp:969 
UE4Editor_UnrealEd!FTickableEditorObject::TickObjects() tickableeditorobject.h:17 
UE4Editor_UnrealEd!UEditorEngine::Tick() editorengine.cpp:1181 
UE4Editor_UnrealEd!UUnrealEdEngine::Tick() unrealedengine.cpp:371 
UE4Editor!FEngineLoop::Tick() launchengineloop.cpp:2834 
UE4Editor!GuardedMain() launch.cpp:156 
UE4Editor!GuardedMainWrapper() launchwindows.cpp:126 
UE4Editor!WinMain() launchwindows.cpp:202 
UE4Editor!__scrt_common_main_seh() exe_common.inl:264 
kernel32!<Unknown> 
ntdll!<Unknown>

Community References

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Fixed

Component	UE - Gameplay
Affects Versions	4.13
Target Fix	4.13

Fix Commit	3082294
Main Commit	3092051
Release Commit	3082294

Created	Aug 8, 2016
Resolved	Aug 9, 2016
Updated	Apr 27, 2018

View Jira Issue

UE-34377

Crash when importing an Alembic file with Materials as a different asset type than one that already exists

Crash when importing an Alembic file with Materials as a different asset type than one that already exists

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