Fbx import crash

Hello
I try to import the skeletal zombie model as Fbx, but I get a crash every time.

Assertion failed: ((BoneIndex == 0) && (BoneInfo.ParentIndex == INDEX_NONE)) || ((BoneIndex > 0) && RawRefBoneInfo.IsValidIndex(BoneInfo.ParentIndex)) [File:D:\Build\++UE4+Release-4.15+Compile\Sync\Engine\Source\Runtime\Engine\Public\ReferenceSkeleton.h] [Line: 184] 

UE4Editor_Core!FDebug::AssertFailed() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:349]
UE4Editor_Engine!FReferenceSkeleton::Add() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\engine\public\referenceskeleton.h:185]
UE4Editor_Engine!USkeleton::CreateReferenceSkeletonFromMesh() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\engine\private\animation\.cpp:585]
UE4Editor_Engine!USkeleton::MergeBonesToBoneTree() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\engine\private\animation\.cpp:606]
UE4Editor_Engine!USkeleton::MergeAllBonesToBoneTree() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\engine\private\animation\.cpp:547]
UE4Editor_UnrealEd!UnFbx::FFbxImporter::ImportSkeletalMesh() [d:\build\++ue4+release-4.15+compile\sync\engine\source\editor\unrealed\private\fbx\fbxskeletalmeshimport.cpp:1579]
UE4Editor_UnrealEd!UFbxFactory::FactoryCreateBinary() [d:\build\++ue4+release-4.15+compile\sync\engine\source\editor\unrealed\private\fbx\fbxfactory.cpp:459]
UE4Editor_UnrealEd!UFactory::FactoryCreateFile() [d:\build\++ue4+release-4.15+compile\sync\engine\source\editor\unrealed\private\factories\factory.cpp:87]
UE4Editor_UnrealEd!UFactory::ImportObject() [d:\build\++ue4+release-4.15+compile\sync\engine\source\editor\unrealed\private\factories\factory.cpp:162]
UE4Editor_AssetTools!FAssetTools::ImportAssetsInternal() [d:\build\++ue4+release-4.15+compile\sync\engine\source\developer\assettools\private\assettools.cpp:1461]
UE4Editor_AssetTools!FAssetTools::ImportAssets() [d:\build\++ue4+release-4.15+compile\sync\engine\source\developer\assettools\private\assettools.cpp:708]
UE4Editor_AssetTools!FAssetTools::ImportAssets() [d:\build\++ue4+release-4.15+compile\sync\engine\source\developer\assettools\private\assettools.cpp:641]
UE4Editor_ContentBrowser!SContentBrowser::ImportAsset() [d:\build\++ue4+release-4.15+compile\sync\engine\source\editor\contentbrowser\private\scontentbrowser.cpp:836]
UE4Editor_ContentBrowser!SContentBrowser::HandleImportClicked() [d:\build\++ue4+release-4.15+compile\sync\engine\source\editor\contentbrowser\private\scontentbrowser.cpp:827]
UE4Editor_ContentBrowser!TMemberFunctionCaller<SContentBrowser,FReply (__cdecl SContentBrowser::*)(void) __ptr64>::operator()<>() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\core\public\delegates\delegateinstanceinterface.h:165]
UE4Editor_ContentBrowser!TTupleImpl<TIntegerSequence<unsigned int> >::ApplyAfter<TMemberFunctionCaller<SContentBrowser,FReply (__cdecl SContentBrowser::*)(void) __ptr64> >() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\core\public\delegates\tuple.h:134]
UE4Editor_ContentBrowser!TBaseSPMethodDelegateInstance<0,SContentBrowser,0,FReply __cdecl(void)>::Execute() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:327]
UE4Editor_Slate!TBaseDelegate<FReply>::Execute() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\core\public\delegates\delegatesignatureimpl.inl:537]
UE4Editor_Slate!SButton::OnMouseButtonUp() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\slate\private\widgets\input\sbutton.cpp:278]
UE4Editor_Slate!<lambda_8d0e9a1da76abd0a756a3a9d775f5ed1>::operator()() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5075]
UE4Editor_Slate!FEventRouter::Route<FReply,FEventRouter::FToLeafmostPolicy,FPointerEvent,<lambda_8d0e9a1da76abd0a756a3a9d775f5ed1> >() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:238]
UE4Editor_Slate!FSlateApplication::RoutePointerUpEvent() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5064]
UE4Editor_Slate!FSlateApplication::ProcessMouseButtonUpEvent() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5531]
UE4Editor_Slate!FSlateApplication::OnMouseUp() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5508]
UE4Editor_Core!FWindowsApplication::ProcessDeferredMessage() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\core\private\windows\windowsapplication.cpp:1698]
UE4Editor_Core!FWindowsApplication::DeferMessage() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\core\private\windows\windowsapplication.cpp:2120]
UE4Editor_Core!FWindowsApplication::ProcessMessage() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\core\private\windows\windowsapplication.cpp:867]
UE4Editor_Core!FWindowsApplication::AppWndProc() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\core\private\windows\windowsapplication.cpp:714]
user32
user32
UE4Editor_Core!FWindowsPlatformMisc::PumpMessages() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\core\private\windows\windowsplatformmisc.cpp:980]
UE4Editor!FEngineLoop::Tick() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\launch\private\launchengineloop.cpp:2977]
UE4Editor!GuardedMain() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\launch\private\launch.cpp:166]
UE4Editor!GuardedMainWrapper() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:134]
UE4Editor!WinMain() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:210]
UE4Editor!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:264]
kernel32
ntdll

Hi Tracey,

What mesh are you referring to?

Hi Tracey,

We have not heard back from you in a few days, so we are marking this post as Resolved for tracking purposes. If you are still experiencing the issue you reported, please respond to this message with additional information and we will follow up.