Description

This is a common crash that occurs for users in the 4.16 release. Log file attached. Additional information is currently unavailable.

User Descriptions

  • Random Crash After right clicking Static mesh in content browser then hittting Reimport
  • Reimporting meshes. Happened twice in a row.

Source Context

 1174       			if (!bFoundMatchingMaterial)
 1175       			{
 1176       				ImportRemapMaterial[ExistMaterialIndex] = ExistMaterialIndex;
 1177       			}
 1178       		}
 1179       		NewMesh->MaterialRemapIndexPerImportVersion.Add(FMaterialRemapIndex(MaterialMapKey, ImportRemapMaterial));
 1180       	}
 1181       }
 1182       
 1183       void UpdateSomeLodsImportMeshData(UStaticMesh* NewMesh, TArray<int32> *ReimportLodList)
 1184       {
 1185 ***** 	UFbxStaticMeshImportData* ImportData = Cast<UFbxStaticMeshImportData>(NewMesh->AssetImportData);
 1186       	//Update the LOD import data before restoring the data
 1187       	if (ReimportLodList != nullptr && ImportData != nullptr)
 1188       	{
 1189       		for (int32 LodLevelImport : (*ReimportLodList))
Steps to Reproduce

repro steps currently unknown, but seems to occur while reimporting static meshes

Callstack
Access violation - code c0000005 (first/second chance not available)

UE4Editor_UnrealEd!UpdateSomeLodsImportMeshData() [staticmeshedit.cpp:1186]
UE4Editor_UnrealEd!UnFbx::FFbxImporter::ReimportStaticMesh() [fbxstaticmeshimport.cpp:1039]
UE4Editor_UnrealEd!UReimportFbxStaticMeshFactory::Reimport() [editorfactories.cpp:5063]
UE4Editor_UnrealEd!FReimportManager::Reimport() [editor.cpp:284]
UE4Editor_UnrealEd!FReimportManager::ReimportMultiple() [editor.cpp:488]
UE4Editor_UnrealEd!FReimportManager::ValidateAllSourceFileAndReimport() [editor.cpp:459]
UE4Editor_ContentBrowser!FAssetContextMenu::ExecuteReimport() [assetcontextmenu.cpp:1394]
UE4Editor_ContentBrowser!TBaseSPMethodDelegateInstance<0,FAssetContextMenu,0,TTypeWrapper<void> __cdecl() [delegateinstancesimpl.h:327]
UE4Editor_ContentBrowser!TBaseSPMethodDelegateInstance<0,FAssetContextMenu,0,void __cdecl() [delegateinstancesimpl.h:434]
UE4Editor_Slate!SMenuEntryBlock::OnClicked() [smenuentryblock.cpp:1051]
UE4Editor_Slate!SMenuEntryBlock::OnMenuItemButtonClicked() [smenuentryblock.cpp:1002]
UE4Editor_Slate!TMemberFunctionCaller<SMenuEntryBlock,FReply() [delegateinstanceinterface.h:165]
UE4Editor_Slate!UE4Tuple_Private::TTupleImpl<TIntegerSequence<unsigned int> >::ApplyAfter<TMemberFunctionCaller<SMenuEntryBlock,FReply() [tuple.h:497]
UE4Editor_Slate!TBaseSPMethodDelegateInstance<0,SMenuEntryBlock,0,FReply __cdecl() [delegateinstancesimpl.h:327]
UE4Editor_Slate!TBaseDelegate<FReply>::Execute() [delegatesignatureimpl.inl:537]
UE4Editor_Slate!SButton::OnMouseButtonUp() [sbutton.cpp:278]
UE4Editor_Slate!SMenuEntryButton::OnMouseButtonUp() [smenuentryblock.cpp:399]
UE4Editor_Slate!<lambda_8d0e9a1da76abd0a756a3a9d775f5ed1>::operator() [slateapplication.cpp:5049]
UE4Editor_Slate!FEventRouter::Route<FReply,FEventRouter::FToLeafmostPolicy,FPointerEvent,<lambda_8d0e9a1da76abd0a756a3a9d775f5ed1> >() [slateapplication.cpp:239]
UE4Editor_Slate!FSlateApplication::RoutePointerUpEvent() [slateapplication.cpp:5038]
UE4Editor_Slate!FSlateApplication::ProcessMouseButtonUpEvent() [slateapplication.cpp:5515]
UE4Editor_Slate!FSlateApplication::OnMouseUp() [slateapplication.cpp:5495]
UE4Editor_Core!FWindowsApplication::ProcessDeferredMessage() [windowsapplication.cpp:1704]
UE4Editor_Core!FWindowsApplication::DeferMessage() [windowsapplication.cpp:2127]
UE4Editor_Core!FWindowsApplication::ProcessMessage() [windowsapplication.cpp:867]
UE4Editor_Core!FWindowsApplication::AppWndProc() [windowsapplication.cpp:714]
user32!UserCallWinProcCheckWow()
user32!DispatchMessageWorker()
UE4Editor_Core!FWindowsPlatformMisc::PumpMessages() [windowsplatformmisc.cpp:1009]
UE4Editor!FEngineLoop::Tick() [launchengineloop.cpp:3058]
UE4Editor!GuardedMain() [launch.cpp:166]
UE4Editor!GuardedMainWrapper() [launchwindows.cpp:134]
UE4Editor!WinMain() [launchwindows.cpp:210]
UE4Editor!__scrt_common_main_seh() [exe_common.inl:253]
kernel32!BaseThreadInitThunk()
ntdll!RtlUserThreadStart()

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Fixed
ComponentTools
Affects Versions4.16
Target Fix4.16.34.17
Fix Commit3521269
Main Commit3555226
Release Commit3521269
CreatedJun 22, 2017
ResolvedJul 5, 2017
UpdatedFeb 4, 2019
View Jira Issue