# Fatal Error on launching

**URL:** <https://forums.unrealengine.com/t/fatal-error-on-launching/379551>\
**Category:** Blueprint\
**Tags:** engine-compile, fatal-error, unreal-engine, crash, bug-report, question, Blueprint\
**Created:** [December 17, 2016, 5:46pm UTC](https://forums.unrealengine.com/t/fatal-error-on-launching/379551 "2016-12-17T17:46:35Z")\
**Posts on this page:** 14\
**Page:** 1

<div class="post-metadata">

**Author:** ![Skunkmeister](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Skunkmeister](https://forums.unrealengine.com/u/Skunkmeister)\
**Post date:** [December 17, 2016, 5:46pm UTC](https://forums.unrealengine.com/t/fatal-error-on-launching/379551/1 "2016-12-17T17:46:35Z")

</div>

I’m putting this under bug reports in case it is indeed a bug.

Basically, when I launch, I crash. I just finished scripting in event dispatchers when this happened. It didn’t crash in engine, I just shut down and restarted and now this:  
Thank you!!!

MachineId:47DBEA184AE067B65FEF1DB56172DEC0  
EpicAccountId:15c7b71ee2554c28988251debf1048b7

Fatal error: [File:D:\Build++UE4+Release-4.14+Compile\Sync\Engine\Source\Runtime\CoreUObject\Private\Templates\Casts.cpp] [Line: 11]  
Cast of LinkerPlaceholderExportObject /Game/GamemodeandBasicStuff/FPPAssets/BaseCharacter.BaseCharacter\_C:GunSwitchable\_GEN\_VARIABLE.GunSwitchable\_GEN\_VARIABLE\_M4A1\_AI\_C\_CAT to Actor failed

UE4Editor\_Core!FDebug::AssertFailed() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:332]  
UE4Editor\_CoreUObject!CastLogError() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\templates\casts.cpp:12]  
UE4Editor\_Engine!CastChecked() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\public\templates\casts.h:203]  
UE4Editor\_Engine!UChildActorComponent::Serialize() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\engine\private\components\childactorcomponent.cpp:91]  
UE4Editor\_CoreUObject!FLinkerLoad::Preload() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:3414]  
UE4Editor\_CoreUObject!FLinkerLoad::CreateExportAndPreload() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2890]  
UE4Editor\_CoreUObject!FLinkerLoad::LoadAllObjects() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:3023]  
UE4Editor\_CoreUObject!LoadPackageInternalInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1271]  
UE4Editor\_CoreUObject!LoadPackageInternal() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1423]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImportInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2561]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2327]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImportInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2609]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2327]  
UE4Editor\_CoreUObject!FLinkerLoad::CreateImport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:4257]  
UE4Editor\_CoreUObject!FLinkerLoad::ResolveDependencyPlaceholder() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\blueprint\blueprintsupport.cpp:1090]  
UE4Editor\_CoreUObject!FLinkerLoad::ResolveDeferredDependencies() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\blueprint\blueprintsupport.cpp:950]  
UE4Editor\_CoreUObject!FLinkerLoad::Preload() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:3461]  
UE4Editor\_CoreUObject!FLinkerLoad::CreateExport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:4111]  
UE4Editor\_CoreUObject!FLinkerLoad::IndexToObject() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:4334]  
UE4Editor\_CoreUObject!FLinkerLoad::CreateExport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:3807]  
UE4Editor\_CoreUObject!FLinkerLoad::CreateExportAndPreload() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2884]  
UE4Editor\_CoreUObject!FLinkerLoad::LoadAllObjects() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:3023]  
UE4Editor\_CoreUObject!LoadPackageInternalInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1271]  
UE4Editor\_CoreUObject!LoadPackageInternal() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1423]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImportInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2561]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2327]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImportInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2609]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2327]  
UE4Editor\_CoreUObject!FLinkerLoad::CreateImport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:4257]  
UE4Editor\_CoreUObject!FLinkerLoad::ResolveAllImports() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\blueprint\blueprintsupport.cpp:1196]  
UE4Editor\_CoreUObject!FLinkerLoad::FinalizeBlueprint() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\blueprint\blueprintsupport.cpp:1284]  
UE4Editor\_CoreUObject!FLinkerLoad::Preload() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:3461]  
UE4Editor\_CoreUObject!FLinkerLoad::CreateExport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:4111]  
UE4Editor\_CoreUObject!FLinkerLoad::IndexToObject() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:4334]  
UE4Editor\_CoreUObject!FLinkerLoad::CreateExport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:3807]  
UE4Editor\_CoreUObject!FLinkerLoad::IndexToObject() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:4334]  
UE4Editor\_CoreUObject!FLinkerLoad::CreateExport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:3807]  
UE4Editor\_CoreUObject!FLinkerLoad::CreateExportAndPreload() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2884]  
UE4Editor\_CoreUObject!FLinkerLoad::LoadAllObjects() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:3023]  
UE4Editor\_CoreUObject!LoadPackageInternalInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1271]  
UE4Editor\_CoreUObject!LoadPackageInternal() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1423]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImportInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2561]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2327]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImportInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2609]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2327]  
UE4Editor\_CoreUObject!FLinkerLoad::Verify() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2105]  
UE4Editor\_CoreUObject!FLinkerLoad::FinalizeCreation() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2015]  
UE4Editor\_CoreUObject!FLinkerLoad::Tick() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:699]  
UE4Editor\_CoreUObject!FLinkerLoad::CreateLinker() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:404]  
UE4Editor\_CoreUObject!GetPackageLinker() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linker.cpp:657]  
UE4Editor\_CoreUObject!LoadPackageInternalInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1196]  
UE4Editor\_CoreUObject!LoadPackageInternal() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1423]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImportInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2561]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2327]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImportInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2609]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2327]  
UE4Editor\_CoreUObject!FLinkerLoad::Verify() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2105]  
UE4Editor\_CoreUObject!FLinkerLoad::FinalizeCreation() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2015]  
UE4Editor\_CoreUObject!FLinkerLoad::Tick() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:699]  
UE4Editor\_CoreUObject!FLinkerLoad::CreateLinker() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:404]  
UE4Editor\_CoreUObject!GetPackageLinker() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linker.cpp:657]  
UE4Editor\_CoreUObject!LoadPackageInternalInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1196]  
UE4Editor\_CoreUObject!LoadPackageInternal() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1423]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImportInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2561]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2327]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImportInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2609]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2327]  
UE4Editor\_CoreUObject!FLinkerLoad::CreateImport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:4257]  
UE4Editor\_CoreUObject!FLinkerLoad::ResolveAllImports() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\blueprint\blueprintsupport.cpp:1196]  
UE4Editor\_CoreUObject!FLinkerLoad::FinalizeBlueprint() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\blueprint\blueprintsupport.cpp:1284]  
UE4Editor\_CoreUObject!FLinkerLoad::Preload() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:3461]  
UE4Editor\_CoreUObject!FLinkerLoad::CreateExport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:4111]  
UE4Editor\_CoreUObject!FLinkerLoad::IndexToObject() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:4334]  
UE4Editor\_CoreUObject!FLinkerLoad::CreateExport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:3807]  
UE4Editor\_CoreUObject!FLinkerLoad::CreateExportAndPreload() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2884]  
UE4Editor\_CoreUObject!FLinkerLoad::LoadAllObjects() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:3023]  
UE4Editor\_CoreUObject!LoadPackageInternalInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1271]  
UE4Editor\_CoreUObject!LoadPackageInternal() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1423]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImportInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2561]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2327]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImportInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2609]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2327]  
UE4Editor\_CoreUObject!FLinkerLoad::GetExportLoadClass() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2912]  
UE4Editor\_CoreUObject!FLinkerLoad::CreateExport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:3636]  
UE4Editor\_CoreUObject!FLinkerLoad::CreateExportAndPreload() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2884]  
UE4Editor\_CoreUObject!FLinkerLoad::LoadAllObjects() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:3023]  
UE4Editor\_CoreUObject!LoadPackageInternalInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1271]  
UE4Editor\_CoreUObject!LoadPackageInternal() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1423]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImportInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2561]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2327]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImportInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2609]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2327]  
UE4Editor\_CoreUObject!FLinkerLoad::CreateImport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:4257]  
UE4Editor\_CoreUObject!FLinkerLoad::IndexToObject() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:4369]  
UE4Editor\_CoreUObject!FLinkerLoad::operator\<\<() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:4531]  
UE4Editor\_CoreUObject!FLinkerLoad::Preload() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:3414]  
UE4Editor\_CoreUObject!FLinkerLoad::CreateExportAndPreload() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2890]  
UE4Editor\_CoreUObject!FLinkerLoad::LoadAllObjects() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:3023]  
UE4Editor\_CoreUObject!LoadPackageInternalInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1271]  
UE4Editor\_CoreUObject!LoadPackageInternal() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1423]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImportInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2561]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2327]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImportInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2609]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2327]  
UE4Editor\_CoreUObject!FLinkerLoad::CreateImport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:4257]  
UE4Editor\_CoreUObject!FLinkerLoad::ResolveAllImports() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\blueprint\blueprintsupport.cpp:1196]  
UE4Editor\_CoreUObject!FLinkerLoad::FinalizeBlueprint() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\blueprint\blueprintsupport.cpp:1284]  
UE4Editor\_CoreUObject!FLinkerLoad::Preload() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:3461]  
UE4Editor\_CoreUObject!FLinkerLoad::CreateExport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:4111]  
UE4Editor\_CoreUObject!FLinkerLoad::IndexToObject() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:4334]  
UE4Editor\_CoreUObject!FLinkerLoad::CreateExport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:3807]  
UE4Editor\_CoreUObject!FLinkerLoad::CreateExportAndPreload() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2884]  
UE4Editor\_CoreUObject!FLinkerLoad::LoadAllObjects() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:3023]  
UE4Editor\_CoreUObject!LoadPackageInternalInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1271]  
UE4Editor\_CoreUObject!LoadPackageInternal() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1423]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImportInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2561]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2327]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImportInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2609]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2327]  
UE4Editor\_CoreUObject!FLinkerLoad::Verify() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2105]  
UE4Editor\_CoreUObject!FLinkerLoad::FinalizeCreation() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2015]  
UE4Editor\_CoreUObject!FLinkerLoad::Tick() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:699]  
UE4Editor\_CoreUObject!FLinkerLoad::CreateLinker() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:404]  
UE4Editor\_CoreUObject!GetPackageLinker() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linker.cpp:657]  
UE4Editor\_CoreUObject!LoadPackageInternalInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1196]  
UE4Editor\_CoreUObject!LoadPackageInternal() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1423]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImportInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2561]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2327]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImportInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2609]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2327]  
UE4Editor\_CoreUObject!FLinkerLoad::Verify() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2105]  
UE4Editor\_CoreUObject!FLinkerLoad::FinalizeCreation() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2015]  
UE4Editor\_CoreUObject!FLinkerLoad::Tick() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:699]  
UE4Editor\_CoreUObject!FLinkerLoad::CreateLinker() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:404]  
UE4Editor\_CoreUObject!GetPackageLinker() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linker.cpp:657]  
UE4Editor\_CoreUObject!LoadPackageInternalInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1196]  
UE4Editor\_CoreUObject!LoadPackageInternal() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1423]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImportInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2561]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2327]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImportInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2609]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2327]  
UE4Editor\_CoreUObject!FLinkerLoad::Verify() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2105]  
UE4Editor\_CoreUObject!FLinkerLoad::FinalizeCreation() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2015]  
UE4Editor\_CoreUObject!FLinkerLoad::Tick() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:699]  
UE4Editor\_CoreUObject!FLinkerLoad::CreateLinker() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:404]  
UE4Editor\_CoreUObject!GetPackageLinker() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linker.cpp:657]  
UE4Editor\_CoreUObject!LoadPackageInternalInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1196]  
UE4Editor\_CoreUObject!LoadPackageInternal() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1423]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImportInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2561]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2327]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImportInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2609]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2327]  
UE4Editor\_CoreUObject!FLinkerLoad::Verify() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2105]  
UE4Editor\_CoreUObject!FLinkerLoad::FinalizeCreation() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2015]  
UE4Editor\_CoreUObject!FLinkerLoad::Tick() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:699]  
UE4Editor\_CoreUObject!FLinkerLoad::CreateLinker() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:404]  
UE4Editor\_CoreUObject!GetPackageLinker() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linker.cpp:657]  
UE4Editor\_CoreUObject!LoadPackageInternalInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1196]  
UE4Editor\_CoreUObject!LoadPackageInternal() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1423]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImportInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2561]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2327]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImportInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2609]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2327]  
UE4Editor\_CoreUObject!FLinkerLoad::Verify() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2105]  
UE4Editor\_CoreUObject!FLinkerLoad::FinalizeCreation() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2015]  
UE4Editor\_CoreUObject!FLinkerLoad::Tick() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:699]  
UE4Editor\_CoreUObject!FLinkerLoad::CreateLinker() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:404]  
UE4Editor\_CoreUObject!GetPackageLinker() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linker.cpp:657]  
UE4Editor\_CoreUObject!LoadPackageInternalInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1196]  
UE4Editor\_CoreUObject!LoadPackageInternal() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1423]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImportInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2561]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2327]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImportInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2609]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2327]  
UE4Editor\_CoreUObject!FLinkerLoad::Verify() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2105]  
UE4Editor\_CoreUObject!FLinkerLoad::FinalizeCreation() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2015]  
UE4Editor\_CoreUObject!FLinkerLoad::Tick() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:699]  
UE4Editor\_CoreUObject!FLinkerLoad::CreateLinker() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:404]  
UE4Editor\_CoreUObject!GetPackageLinker() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linker.cpp:657]  
UE4Editor\_CoreUObject!LoadPackageInternalInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1196]  
UE4Editor\_CoreUObject!LoadPackageInternal() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1423]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImportInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2561]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2327]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImportInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2609]  
UE4Editor\_CoreUObject!FLinkerLoad::VerifyImport() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2327]  
UE4Editor\_CoreUObject!FLinkerLoad::Verify() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2105]  
UE4Editor\_CoreUObject!FLinkerLoad::FinalizeCreation() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2015]  
UE4Editor\_CoreUObject!FLinkerLoad::Tick() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:699]  
UE4Editor\_CoreUObject!FLinkerLoad::CreateLinker() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:404]  
UE4Editor\_CoreUObject!GetPackageLinker() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\linker.cpp:657]  
UE4Editor\_CoreUObject!LoadPackageInternalInner() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1196]  
UE4Editor\_CoreUObject!LoadPackage() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1437]  
UE4Editor\_UnrealEd!UEditorEngine::Map\_Load() [d:\build++ue4+release-4.14+compile\sync\engine\source\editor\unrealed\private\editorserver.cpp:2445]  
UE4Editor\_UnrealEd!UEditorEngine::HandleMapCommand() [d:\build++ue4+release-4.14+compile\sync\engine\source\editor\unrealed\private\editorserver.cpp:6057]  
UE4Editor\_UnrealEd!UEditorEngine::Exec() [d:\build++ue4+release-4.14+compile\sync\engine\source\editor\unrealed\private\editorserver.cpp:5538]  
UE4Editor\_UnrealEd!UUnrealEdEngine::Exec() [d:\build++ue4+release-4.14+compile\sync\engine\source\editor\unrealed\private\unrealedsrv.cpp:615]  
UE4Editor\_UnrealEd!FEditorFileUtils::LoadMap() [d:\build++ue4+release-4.14+compile\sync\engine\source\editor\unrealed\private\filehelpers.cpp:2180]  
UE4Editor\_UnrealEd!FEditorFileUtils::LoadDefaultMapAtStartup() [d:\build++ue4+release-4.14+compile\sync\engine\source\editor\unrealed\private\filehelpers.cpp:3496]  
UE4Editor\_UnrealEd!FUnrealEdMisc::OnInit() [d:\build++ue4+release-4.14+compile\sync\engine\source\editor\unrealed\private\unrealedmisc.cpp:309]  
UE4Editor\_UnrealEd!EditorInit() [d:\build++ue4+release-4.14+compile\sync\engine\source\editor\unrealed\private\unrealed.cpp:89]  
UE4Editor!GuardedMain() [d:\build++ue4+release-4.14+compile\sync\engine\source\runtime\launch\private\launch.cpp:136]  
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

---

<div class="post-metadata">

**Author:** ![anonymous\_user\_dceb25d5](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_dceb25d5](https://forums.unrealengine.com/u/anonymous_user_dceb25d5)\
**Post date:** [December 17, 2016, 6:00pm UTC](https://forums.unrealengine.com/t/fatal-error-on-launching/379551/2 "2016-12-17T18:00:54Z")

</div>

Skunkmeister,

-First In the Epic Launcher verify your version of the engine with the drop down arrow next to the launch button.

-Then before starting the engine, remove only the Intermediate and Saved folders under your project settings.

-Note that there has been a hot fix released already, 4.14.1. Which might address this if you haven’t already updated.

---

<div class="post-metadata">

**Author:** ![Skunkmeister](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Skunkmeister](https://forums.unrealengine.com/u/Skunkmeister)\
**Post date:** [December 17, 2016, 9:09pm UTC](https://forums.unrealengine.com/t/fatal-error-on-launching/379551/3 "2016-12-17T21:09:16Z")

</div>

I do indeed have 4.14.1. I probably should have made that clear… sorry.

---

<div class="post-metadata">

**Author:** ![Skunkmeister](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Skunkmeister](https://forums.unrealengine.com/u/Skunkmeister)\
**Post date:** [December 17, 2016, 9:09pm UTC](https://forums.unrealengine.com/t/fatal-error-on-launching/379551/4 "2016-12-17T21:09:29Z")

</div>

but yes, ill try that. Thank you.

---

<div class="post-metadata">

**Author:** ![Skunkmeister](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Skunkmeister](https://forums.unrealengine.com/u/Skunkmeister)\
**Post date:** [December 17, 2016, 9:18pm UTC](https://forums.unrealengine.com/t/fatal-error-on-launching/379551/5 "2016-12-17T21:18:19Z")

</div>

Actually, this is a pretty important project to me, so before I go deleting anything, perhaps you could provide some of the information relative to the impact deleting these folders has?

---

<div class="post-metadata">

**Author:** ![anonymous\_user\_dceb25d5](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_dceb25d5](https://forums.unrealengine.com/u/anonymous_user_dceb25d5)\
**Post date:** [December 17, 2016, 10:05pm UTC](https://forums.unrealengine.com/t/fatal-error-on-launching/379551/6 "2016-12-17T22:05:54Z")

</div>

Well it’s important to always have backups and do them every time you work on your project. If you are not backing up to another median (external USB/HD/cloud storage) then that is pretty scary. Trust me, back it up now.

The Intermediate and Saved folders inside your project folder are made every time you open your project. They are auto generated and I have deleted them many times. Doing this usually fixes strange bugs or linking errors like yours, not in every case but it’s worth a try.

The Config and build folders you can ignore but they are where inputs and other general build data is. Content is where the heart of all your stuff resides.

more info here…

> **[Directory Structure](https://docs.unrealengine.com/5.1/en-US/unreal-engine-directory-structure/)**
>
> Overview of the directories that make up the engine and game projects.

Hope this helps.

---

<div class="post-metadata">

**Author:** ![Skunkmeister](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Skunkmeister](https://forums.unrealengine.com/u/Skunkmeister)\
**Post date:** [December 17, 2016, 10:37pm UTC](https://forums.unrealengine.com/t/fatal-error-on-launching/379551/7 "2016-12-17T22:37:29Z")

</div>

Thank you so much! Yeah I need to start using something like GITHUB… I appreciate the tips! I’ll go ahead and delete them and see what happens…

---

<div class="post-metadata">

**Author:** ![Skunkmeister](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Skunkmeister](https://forums.unrealengine.com/u/Skunkmeister)\
**Post date:** [December 17, 2016, 10:39pm UTC](https://forums.unrealengine.com/t/fatal-error-on-launching/379551/8 "2016-12-17T22:39:23Z")

</div>

Right so the crash is consistent… I verified and deleted the folders, no difference… Is there any way I can delete the specific asset (I’m pretty sure I know what’s wrong here…

---

<div class="post-metadata">

**Author:** ![Skunkmeister](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Skunkmeister](https://forums.unrealengine.com/u/Skunkmeister)\
**Post date:** [December 17, 2016, 10:39pm UTC](https://forums.unrealengine.com/t/fatal-error-on-launching/379551/9 "2016-12-17T22:39:34Z")

</div>

Or is there a better course of action?

---

<div class="post-metadata">

**Author:** ![anonymous\_user\_dceb25d5](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_dceb25d5](https://forums.unrealengine.com/u/anonymous_user_dceb25d5)\
**Post date:** [December 17, 2016, 10:46pm UTC](https://forums.unrealengine.com/t/fatal-error-on-launching/379551/10 "2016-12-17T22:46:34Z")

</div>

yes, if you know which asset it was that’s causing the error go inside your Content folder and move(not delete) the .uasset file away. Once its out of your project folder then restart project and see if it works.

My assumption is that it’s something recent you added if you said in your OP that it was working just fine before hand. Best of luck.

---

<div class="post-metadata">

**Author:** ![Skunkmeister](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Skunkmeister](https://forums.unrealengine.com/u/Skunkmeister)\
**Post date:** [December 18, 2016, 12:19am UTC](https://forums.unrealengine.com/t/fatal-error-on-launching/379551/11 "2016-12-18T00:19:07Z")

</div>

Thank you, and yes, I did remove the asset (temporarily), but I need a way to import and edit the uasset without restarting… might this be possible?

---

<div class="post-metadata">

**Author:** ![Skunkmeister](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Skunkmeister](https://forums.unrealengine.com/u/Skunkmeister)\
**Post date:** [December 18, 2016, 12:27am UTC](https://forums.unrealengine.com/t/fatal-error-on-launching/379551/12 "2016-12-18T00:27:09Z")

</div>

scratch that, I’m going to start fresh and backup this time. i didn’t get too far and I’ve learned a lot. I appreciate all the help!!!

---

<div class="post-metadata">

**Author:** ![Skunkmeister](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Skunkmeister](https://forums.unrealengine.com/u/Skunkmeister)\
**Post date:** [December 25, 2016, 1:36am UTC](https://forums.unrealengine.com/t/fatal-error-on-launching/379551/13 "2016-12-25T01:36:26Z")

</div>

It happened in my latest project as well and so I was able to reproduce it. This is a bug that was thought to have been fixed but hath returned.

---

<div class="post-metadata">

**Author:** ![Sean\_Flint](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Sean\_Flint](https://forums.unrealengine.com/u/Sean_Flint)\
**Post date:** [December 29, 2016, 2:42pm UTC](https://forums.unrealengine.com/t/fatal-error-on-launching/379551/14 "2016-12-29T14:42:23Z")

</div>

Hey Skunkmeister,

I believe the issue that you are running into is [Unreal Engine Issues and Bug Tracker (UE-39323)](https://issues.unrealengine.com/issue/UE-39323)

Take a look at it and let me know what you think. This issue has been resolved for 4.15, and if you are using a source build you should be able to merge in the fix commit.

Have a great day