# Crash after impoting fbx with morh targets

**URL:** <https://forums.unrealengine.com/t/crash-after-impoting-fbx-with-morh-targets/376662>\
**Category:** Character & Animation\
**Tags:** unreal-engine, question\
**Created:** [November 17, 2016, 10:14pm UTC](https://forums.unrealengine.com/t/crash-after-impoting-fbx-with-morh-targets/376662 "2016-11-17T22:14:29Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Adrien](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Adrien](https://forums.unrealengine.com/u/Adrien)\
**Post date:** [November 17, 2016, 10:14pm UTC](https://forums.unrealengine.com/t/crash-after-impoting-fbx-with-morh-targets/376662/1 "2016-11-17T22:14:29Z")

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MachineId:B8A8BEA942B6F7428EC4AC9A1AF996D5  
EpicAccountId:d08c8ca92d6d4a11afb11a19f8c329cb

Assertion failed: NewPosition \>= 0 [File:D:\Build++UE4+Release-4.14+Compile\Sync\Engine\Source\Runtime\Core\Private\Windows\WindowsPlatformFile.cpp] [Line: 452]

UE4Editor\_Core!FDebug::AssertFailed() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:332]  
UE4Editor\_Core!FFileHandleWindows::Seek() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\core\private\windows\windowsplatformfile.cpp:453]  
UE4Editor\_Core!FArchiveFileWriterGeneric::Seek() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\core\private\hal\filemanagergeneric.cpp:785]  
UE4Editor\_CoreUObject!UStruct::SerializeTaggedProperties() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\class.cpp:1181]  
UE4Editor\_CoreUObject!UObject::SerializeScriptProperties() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\obj.cpp:1130]  
UE4Editor\_CoreUObject!UObject::Serialize() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\obj.cpp:1064]  
UE4Editor\_Engine!UMorphTarget::Serialize() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\engine\private\morphmesh.cpp:21]  
UE4Editor\_CoreUObject!UPackage::Save() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\savepackage.cpp:5097]  
UE4Editor\_UnrealEd!UEditorEngine::Save() [d:\build++ue4+release-4.14+compile\sync\engine\source\editor\unrealed\private\editorengine.cpp:3966]  
UE4Editor\_UnrealEd!UEditorEngine::SavePackage() [d:\build++ue4+release-4.14+compile\sync\engine\source\editor\unrealed\private\editorengine.cpp:4026]  
UE4Editor\_UnrealEd!UEditorEngine::Exec\_Obj() [d:\build++ue4+release-4.14+compile\sync\engine\source\editor\unrealed\private\editorserver.cpp:4501]  
UE4Editor\_UnrealEd!UEditorEngine::Exec() [d:\build++ue4+release-4.14+compile\sync\engine\source\editor\unrealed\private\editorserver.cpp:5596]  
UE4Editor\_UnrealEd!UUnrealEdEngine::Exec() [d:\build++ue4+release-4.14+compile\sync\engine\source\editor\unrealed\private\unrealedsrv.cpp:615]  
UE4Editor\_UnrealEd!FEditorFileUtils::AutosaveContentPackagesEx() [d:\build++ue4+release-4.14+compile\sync\engine\source\editor\unrealed\private\filehelpers.cpp:2437]  
UE4Editor\_UnrealEd!FPackageAutoSaver::AttemptAutoSave() [d:\build++ue4+release-4.14+compile\sync\engine\source\editor\unrealed\private\packageautosaver.cpp:189]  
UE4Editor\_UnrealEd!UUnrealEdEngine::Tick() [d:\build++ue4+release-4.14+compile\sync\engine\source\editor\unrealed\private\unrealedengine.cpp:399]  
UE4Editor!FEngineLoop::Tick() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\launch\private\launchengineloop.cpp:2859]  
UE4Editor!GuardedMain() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\launch\private\launch.cpp:152]  
UE4Editor!GuardedMainWrapper() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:126]  
UE4Editor!WinMain() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:202]  
UE4Editor!\_\_scrt\_common\_main\_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe\_common.inl:264]  
kernel32  
ntdll

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<div class="post-metadata">

**Author:** ![anonymous\_user\_280dd372](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_280dd372](https://forums.unrealengine.com/u/anonymous_user_280dd372)\
**Post date:** [November 21, 2016, 7:41pm UTC](https://forums.unrealengine.com/t/crash-after-impoting-fbx-with-morh-targets/376662/2 "2016-11-21T19:41:56Z")

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Hi Adrien,

We aren’t seeing this issue with our internal assets.

Can you send me the FBX that you’re attempting to import? You can PM me a download link on the forums.

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<div class="post-metadata">

**Author:** ![anonymous\_user\_280dd372](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_280dd372](https://forums.unrealengine.com/u/anonymous_user_280dd372)\
**Post date:** [November 29, 2016, 6:41pm UTC](https://forums.unrealengine.com/t/crash-after-impoting-fbx-with-morh-targets/376662/3 "2016-11-29T18:41:19Z")

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Hey Adrien,

Thanks for providing the asset to reproduce this crash. I have entered [UE-39135](https://issues.unrealengine.com/issue/UE-39135).