This is a trending crash coming out of the 4.18 previews. It seems to be related to exporting assets from the editor.
User Descriptions
Source Context
141 void FFbxExporter::FillExportOptions(bool BatchMode, bool bShowOptionDialog, const FString& FullPath, bool& OutOperationCanceled, bool& bOutExportAll) 142 { 143 OutOperationCanceled = false; 144 145 if (ExportOptions == nullptr) 146 { 147 ExportOptions = NewObject<UFbxExportOption>(GetTransientPackage(), NAME_None); 148 } 149 150 //Load the option from the user save ini file 151 ***** ExportOptions->LoadOptions(); 152 153 //Return if we do not show the export options or we are running automation test or we are unattended 154 if (!bShowOptionDialog || GIsAutomationTesting || FApp::IsUnattended()) 155 { 156 return; 157 }
repro steps currently unknown
According to the user descriptions this should be as easy as selecting a StaticMesh in the Content Browser and choosing Asset Actions > Export. However my quick test of this multiple times did not reproduce any issue. It may depend on the config settings.
Access violation - code c0000005 (first/second chance not available) UE4Editor_UnrealEd!UnFbx::FFbxExporter::FillExportOptions() [fbxmainexport.cpp:152] UE4Editor_UnrealEd!UStaticMeshExporterFBX::ExportBinary() [editorexporters.cpp:1825] UE4Editor_Engine!UExporter::ExportToArchive() [unrealexporter.cpp:157] UE4Editor_Engine!UExporter::ExportToFileEx() [unrealexporter.cpp:461] UE4Editor_AssetTools!UAssetToolsImpl::ExportAssetsInternal() [assettools.cpp:1882] UE4Editor_AssetTools!UAssetToolsImpl::ExportAssetsWithDialog() [assettools.cpp:713] UE4Editor_ContentBrowser!FAssetContextMenu::ExecuteExport() [assetcontextmenu.cpp:2043] 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:1091] UE4Editor_Slate!SMenuEntryBlock::OnMenuItemButtonClicked() [smenuentryblock.cpp:1042] 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:282] UE4Editor_Slate!SMenuEntryButton::OnMouseButtonUp() [smenuentryblock.cpp:439] UE4Editor_Slate!<lambda_1002768c627006711ef2f351a87ec0e7>::operator() [slateapplication.cpp:5264] UE4Editor_Slate!FEventRouter::Route<FReply,FEventRouter::FToLeafmostPolicy,FPointerEvent,<lambda_1002768c627006711ef2f351a87ec0e7> >() [slateapplication.cpp:234] UE4Editor_Slate!FSlateApplication::RoutePointerUpEvent() [slateapplication.cpp:5253] UE4Editor_Slate!FSlateApplication::ProcessMouseButtonUpEvent() [slateapplication.cpp:5755] UE4Editor_Slate!FSlateApplication::OnMouseUp() [slateapplication.cpp:5735] UE4Editor_ApplicationCore!FWindowsApplication::ProcessDeferredMessage() [windowsapplication.cpp:1725] UE4Editor_ApplicationCore!FWindowsApplication::DeferMessage() [windowsapplication.cpp:2171] UE4Editor_ApplicationCore!FWindowsApplication::ProcessMessage() [windowsapplication.cpp:888] UE4Editor_ApplicationCore!FWindowsApplication::AppWndProc() [windowsapplication.cpp:725] user32!UserCallWinProcCheckWow() user32!DispatchMessageWorker() UE4Editor_ApplicationCore!FWindowsPlatformApplicationMisc::PumpMessages() [windowsplatformapplicationmisc.cpp:129] UE4Editor!FEngineLoop::Tick() [launchengineloop.cpp:3220] 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()
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-50502 in the post.