Crash when upgrading to 5.1

Defuse_Studios · October 9, 2022, 10:43am

Hey guys,

I’m trying to upgrade a project from 5.0 to 5.1 but I’m having an issue where the engine crashes when opening the project. This project works fine in 5.0 and previous UE4 versions as well.

I’ve tested both with the 5.1 (Preview 1) and the 5.1 source version from GitHub. Both versions give the same result, the engine crashes when trying to open the project. I will attach the full crash info below.

If I remove the startup level, I am able to open the project in 5.1 but if I try to open any blueprints the engine crashes with the same crash info.

Any help or advise with this would be amazing.

Thanks,

Assertion failed: FieldClassPtr [File:C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\Field.cpp] [Line: 996] Field type UberGraphFrame does not exist

UnrealEditor_CoreUObject!FField::Construct() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\Field.cpp:996]
UnrealEditor_CoreUObject!UStruct::SerializeProperties() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\Class.cpp:1762]
UnrealEditor_CoreUObject!UStruct::Serialize() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\Class.cpp:1870]
UnrealEditor_CoreUObject!UFunction::Serialize() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\Class.cpp:6468]
UnrealEditor_CoreUObject!FLinkerLoad::Preload() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:4419]
UnrealEditor_CoreUObject!UStruct::PreloadChildren() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\Class.cpp:745]
UnrealEditor_CoreUObject!UStruct::Link() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\Class.cpp:773]
UnrealEditor_Engine!UBlueprintGeneratedClass::Link() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\Engine\Private\BlueprintGeneratedClass.cpp:1806]
UnrealEditor_CoreUObject!UClass::Serialize() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\Class.cpp:5003]
UnrealEditor_Engine!UBlueprintGeneratedClass::Serialize() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\Engine\Private\BlueprintGeneratedClass.cpp:1958]
UnrealEditor_CoreUObject!FLinkerLoad::Preload() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:4419]
UnrealEditor_CoreUObject!FLinkerLoad::CreateExport() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:5236]
UnrealEditor_CoreUObject!FLinkerLoad::CreateImport() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:5415]
UnrealEditor_CoreUObject!FLinkerLoad::IndexToObject() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:5538]
UnrealEditor_CoreUObject!FLinkerLoad::CreateExport() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:4698]
UnrealEditor_CoreUObject!FLinkerLoad::CreateImport() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:5415]
UnrealEditor_CoreUObject!FLinkerLoad::IndexToObject() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:5538]
UnrealEditor_CoreUObject!FLinkerLoad::CreateExport() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:4698]
UnrealEditor_CoreUObject!FLinkerLoad::CreateExportAndPreload() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:3774]
UnrealEditor_CoreUObject!FLinkerLoad::LoadAllObjects() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:3951]
UnrealEditor_CoreUObject!LoadPackageInternal() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:1681]
UnrealEditor_CoreUObject!FLinkerLoad::ResolveDeferredDependencies() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\Blueprint\BlueprintSupport.cpp:1469]
UnrealEditor_CoreUObject!FLinkerLoad::Preload() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:4466]
UnrealEditor_CoreUObject!FLinkerLoad::CreateExport() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:5236]
UnrealEditor_CoreUObject!FLinkerLoad::CreateExportAndPreload() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:3774]
UnrealEditor_CoreUObject!FLinkerLoad::LoadAllObjects() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:3951]
UnrealEditor_CoreUObject!LoadPackageInternal() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:1681]
UnrealEditor_CoreUObject!<lambda_c2c5e999e5b8da72a0d10d026d38d3da>::operator()() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:3296]
UnrealEditor_CoreUObject!FLinkerLoad::VerifyImportInner() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:3424]
UnrealEditor_CoreUObject!FLinkerLoad::VerifyImport() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:2951]
UnrealEditor_CoreUObject!FLinkerLoad::VerifyImportInner() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:3452]
UnrealEditor_CoreUObject!FLinkerLoad::VerifyImport() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:2951]
UnrealEditor_CoreUObject!FLinkerLoad::CreateImport() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:5401]
UnrealEditor_CoreUObject!FLinkerLoad::ResolveDependencyPlaceholder() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\Blueprint\BlueprintSupport.cpp:1652]
UnrealEditor_CoreUObject!FLinkerLoad::ResolveDeferredDependencies() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\Blueprint\BlueprintSupport.cpp:1478]
UnrealEditor_CoreUObject!FLinkerLoad::Preload() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:4466]
UnrealEditor_CoreUObject!FLinkerLoad::CreateExport() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:5236]
UnrealEditor_CoreUObject!FLinkerLoad::CreateExportAndPreload() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:3774]
UnrealEditor_CoreUObject!FLinkerLoad::LoadAllObjects() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:3951]
UnrealEditor_CoreUObject!LoadPackageInternal() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:1681]
UnrealEditor_CoreUObject!<lambda_c2c5e999e5b8da72a0d10d026d38d3da>::operator()() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:3296]
UnrealEditor_CoreUObject!FLinkerLoad::VerifyImportInner() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:3424]
UnrealEditor_CoreUObject!FLinkerLoad::VerifyImport() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:2951]
UnrealEditor_CoreUObject!FLinkerLoad::VerifyImportInner() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:3452]
UnrealEditor_CoreUObject!FLinkerLoad::VerifyImport() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:2951]
UnrealEditor_CoreUObject!FLinkerLoad::CreateImport() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:5401]
UnrealEditor_CoreUObject!FLinkerLoad::ResolveDependencyPlaceholder() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\Blueprint\BlueprintSupport.cpp:1652]
UnrealEditor_CoreUObject!FLinkerLoad::ResolveDeferredDependencies() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\Blueprint\BlueprintSupport.cpp:1478]
UnrealEditor_CoreUObject!FLinkerLoad::Preload() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:4466]
UnrealEditor_CoreUObject!FLinkerLoad::CreateExport() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:5236]
UnrealEditor_CoreUObject!FLinkerLoad::IndexToObject() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:5503]
UnrealEditor_CoreUObject!FLinkerLoad::CreateExport() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:4785]
UnrealEditor_CoreUObject!FLinkerLoad::CreateExportAndPreload() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:3774]
UnrealEditor_CoreUObject!FLinkerLoad::LoadAllObjects() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:3951]
UnrealEditor_CoreUObject!LoadPackageInternal() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:1681]
UnrealEditor_CoreUObject!<lambda_c2c5e999e5b8da72a0d10d026d38d3da>::operator()() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:3296]
UnrealEditor_CoreUObject!FLinkerLoad::VerifyImportInner() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:3424]
UnrealEditor_CoreUObject!FLinkerLoad::VerifyImport() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:2951]
UnrealEditor_CoreUObject!FLinkerLoad::VerifyImportInner() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:3452]
UnrealEditor_CoreUObject!FLinkerLoad::VerifyImport() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:2951]
UnrealEditor_CoreUObject!FLinkerLoad::CreateImport() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:5401]
UnrealEditor_CoreUObject!FLinkerLoad::ResolveDependencyPlaceholder() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\Blueprint\BlueprintSupport.cpp:1652]
UnrealEditor_CoreUObject!FLinkerLoad::ResolveDeferredDependencies() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\Blueprint\BlueprintSupport.cpp:1478]
UnrealEditor_CoreUObject!FLinkerLoad::Preload() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:4466]
UnrealEditor_CoreUObject!FLinkerLoad::CreateExport() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:5236]
UnrealEditor_CoreUObject!FLinkerLoad::CreateExportAndPreload() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:3774]
UnrealEditor_CoreUObject!FLinkerLoad::LoadAllObjects() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:3951]
UnrealEditor_CoreUObject!LoadPackageInternal() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:1681]
UnrealEditor_CoreUObject!<lambda_c2c5e999e5b8da72a0d10d026d38d3da>::operator()() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:3296]
UnrealEditor_CoreUObject!FLinkerLoad::VerifyImportInner() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:3424]
UnrealEditor_CoreUObject!FLinkerLoad::VerifyImport() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:2951]
UnrealEditor_CoreUObject!FLinkerLoad::VerifyImportInner() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:3452]
UnrealEditor_CoreUObject!FLinkerLoad::VerifyImport() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:2951]
UnrealEditor_CoreUObject!FLinkerLoad::Verify() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:2730]
UnrealEditor_CoreUObject!FLinkerLoad::FinalizeCreation() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:2540]
UnrealEditor_CoreUObject!FLinkerLoad::ProcessPackageSummary() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:822]
UnrealEditor_CoreUObject!FLinkerLoad::Tick() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:872]
UnrealEditor_CoreUObject!FLinkerLoad::CreateLinker() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:508]
UnrealEditor_CoreUObject!GetPackageLinker() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\Linker.cpp:885]
UnrealEditor_CoreUObject!LoadPackageInternal() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:1574]
UnrealEditor_CoreUObject!<lambda_c2c5e999e5b8da72a0d10d026d38d3da>::operator()() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:3296]
UnrealEditor_CoreUObject!FLinkerLoad::VerifyImportInner() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:3424]
UnrealEditor_CoreUObject!FLinkerLoad::VerifyImport() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:2951]
UnrealEditor_CoreUObject!FLinkerLoad::VerifyImportInner() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:3452]
UnrealEditor_CoreUObject!FLinkerLoad::VerifyImport() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:2951]
UnrealEditor_CoreUObject!FLinkerLoad::Verify() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:2730]
UnrealEditor_CoreUObject!FLinkerLoad::FinalizeCreation() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:2540]
UnrealEditor_CoreUObject!FLinkerLoad::ProcessPackageSummary() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:822]
UnrealEditor_CoreUObject!FLinkerLoad::Tick() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:872]
UnrealEditor_CoreUObject!FLinkerLoad::CreateLinker() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:508]
UnrealEditor_CoreUObject!GetPackageLinker() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\Linker.cpp:885]
UnrealEditor_CoreUObject!LoadPackageInternal() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:1574]
UnrealEditor_CoreUObject!<lambda_c2c5e999e5b8da72a0d10d026d38d3da>::operator()() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:3296]
UnrealEditor_CoreUObject!FLinkerLoad::VerifyImportInner() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:3424]
UnrealEditor_CoreUObject!FLinkerLoad::VerifyImport() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:2951]
UnrealEditor_CoreUObject!FLinkerLoad::VerifyImportInner() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:3452]
UnrealEditor_CoreUObject!FLinkerLoad::VerifyImport() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:2951]
UnrealEditor_CoreUObject!FLinkerLoad::Verify() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:2730]
UnrealEditor_CoreUObject!FLinkerLoad::FinalizeCreation() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:2540]
UnrealEditor_CoreUObject!FLinkerLoad::ProcessPackageSummary() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:822]
UnrealEditor_CoreUObject!FLinkerLoad::Tick() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:872]
UnrealEditor_CoreUObject!FLinkerLoad::CreateLinker() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:508]
UnrealEditor_CoreUObject!GetPackageLinker() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\Linker.cpp:885]
UnrealEditor_CoreUObject!LoadPackageInternal() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:1574]
UnrealEditor_CoreUObject!<lambda_c2c5e999e5b8da72a0d10d026d38d3da>::operator()() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:3296]
UnrealEditor_CoreUObject!FLinkerLoad::VerifyImportInner() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:3424]
UnrealEditor_CoreUObject!FLinkerLoad::VerifyImport() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:2951]
UnrealEditor_CoreUObject!FLinkerLoad::VerifyImportInner() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:3452]
UnrealEditor_CoreUObject!FLinkerLoad::VerifyImport() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:2951]
UnrealEditor_CoreUObject!FLinkerLoad::Verify() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:2730]
UnrealEditor_CoreUObject!FLinkerLoad::FinalizeCreation() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:2540]
UnrealEditor_CoreUObject!FLinkerLoad::ProcessPackageSummary() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:822]
UnrealEditor_CoreUObject!FLinkerLoad::Tick() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:872]
UnrealEditor_CoreUObject!FLinkerLoad::CreateLinker() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:508]
UnrealEditor_CoreUObject!GetPackageLinker() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\Linker.cpp:885]
UnrealEditor_CoreUObject!LoadPackageInternal() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:1574]
UnrealEditor_CoreUObject!<lambda_c2c5e999e5b8da72a0d10d026d38d3da>::operator()() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:3296]
UnrealEditor_CoreUObject!FLinkerLoad::VerifyImportInner() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:3424]
UnrealEditor_CoreUObject!FLinkerLoad::VerifyImport() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:2951]
UnrealEditor_CoreUObject!FLinkerLoad::VerifyImportInner() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:3452]
UnrealEditor_CoreUObject!FLinkerLoad::VerifyImport() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:2951]
UnrealEditor_CoreUObject!FLinkerLoad::VerifyImportInner() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:3452]
UnrealEditor_CoreUObject!FLinkerLoad::VerifyImport() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:2951]
UnrealEditor_CoreUObject!FLinkerLoad::Verify() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:2730]
UnrealEditor_CoreUObject!FLinkerLoad::FinalizeCreation() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:2540]
UnrealEditor_CoreUObject!FLinkerLoad::ProcessPackageSummary() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:822]
UnrealEditor_CoreUObject!FLinkerLoad::Tick() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:872]
UnrealEditor_CoreUObject!FLinkerLoad::CreateLinker() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp:508]
UnrealEditor_CoreUObject!GetPackageLinker() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\Linker.cpp:885]
UnrealEditor_CoreUObject!LoadPackageInternal() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:1574]
UnrealEditor_CoreUObject!LoadPackage() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:1854]
UnrealEditor_CoreUObject!LoadPackage() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp:1835]
UnrealEditor_UnrealEd!UEditorEngine::Map_Load() [C:\Users\yates\Desktop\UE5\Engine\Source\Editor\UnrealEd\Private\EditorServer.cpp:2725]
UnrealEditor_UnrealEd!UEditorEngine::HandleMapCommand() [C:\Users\yates\Desktop\UE5\Engine\Source\Editor\UnrealEd\Private\EditorServer.cpp:6288]
UnrealEditor_UnrealEd!UEditorEngine::Exec() [C:\Users\yates\Desktop\UE5\Engine\Source\Editor\UnrealEd\Private\EditorServer.cpp:5749]
UnrealEditor_UnrealEd!UUnrealEdEngine::Exec() [C:\Users\yates\Desktop\UE5\Engine\Source\Editor\UnrealEd\Private\UnrealEdSrv.cpp:659]
UnrealEditor_UnrealEd!FEditorFileUtils::LoadMap() [C:\Users\yates\Desktop\UE5\Engine\Source\Editor\UnrealEd\Private\FileHelpers.cpp:2851]
UnrealEditor_UnrealEd!FEditorFileUtils::LoadDefaultMapAtStartup() [C:\Users\yates\Desktop\UE5\Engine\Source\Editor\UnrealEd\Private\FileHelpers.cpp:4519]
UnrealEditor_UnrealEd!FUnrealEdMisc::OnInit() [C:\Users\yates\Desktop\UE5\Engine\Source\Editor\UnrealEd\Private\UnrealEdMisc.cpp:359]
UnrealEditor_UnrealEd!EditorInit() [C:\Users\yates\Desktop\UE5\Engine\Source\Editor\UnrealEd\Private\UnrealEdGlobals.cpp:134]
UnrealEditor!GuardedMain() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\Launch\Private\Launch.cpp:176]
UnrealEditor!GuardedMainWrapper() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:107]
UnrealEditor!LaunchWindowsStartup() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:244]
UnrealEditor!WinMain() [C:\Users\yates\Desktop\UE5\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:282]
UnrealEditor!__scrt_common_main_seh() [D:\a\_work\1\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288]
kernel32
ntdll

Defuse_Studios · October 10, 2022, 6:37pm

Though I should mention how I ended up fixing this, not sure if it will help anyone else.
Basically just removed the startup map from my project so the project opened.
Then found that one of the blueprints would open without the engine crashing, once I opened that blueprint, I could then open other blueprints for some reason.
I then moved the folder in the content browser that had most of my main blueprints in to another folder.
After that it started working. No idea why this fixed it but it did.

NevermoreGX · November 16, 2022, 10:44pm

I did the exact same. But realized with horror that UE 5.1 just really basically bricked the whole project on upgrade. It doesn’t matter that you can open the project. As soon as you change level more than once it still crashes. I tried by selecting “Enable virtual textures for Opacity Mask” in project options, that “did something”. Sure, it didn’t crash that time, but it kept on crashing afterwards on re-open. The cause seems to be arbitrary in relation to whatever I do to fix it.