UE4 Failed to open. PLEASE HELP ASAP!

Development Platform & Builds
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Assertion failed: !InTemplate || InTemplate->IsA(InClass) || (InFlags & RF_ClassDefaultObject) [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.8\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp] [Line: 2517]
StaticConstructObject PointLightComponent /Game/ThirdPersonBP/Blueprints/ThirdPersonCharacter.ThirdPersonCharacter_C:PointLightF2FF9242470F611DB196928D1B8B81D2 is not an instance of class Class /Script/Engine.SpotLightComponent and it is not a CDO.

KERNELBASE.dll {0x00007fffc42a8b9c} + 0 bytes
UE4Editor-Core.dll!FOutputDeviceWindowsError::Serialize() {0x00007fff929f7c0f} + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor-Core.dll!FOutputDevice::Logf__VA() {0x00007fff928b10b8} + 159 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor-Core.dll!FDebug::AssertFailed() {0x00007fff92881e72} + 65 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor-CoreUObject.dll!StaticConstructObject_Internal() {0x00007fff972c4ac9} + 292 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor-CoreUObject.dll!FLinkerLoad::CreateExport() {0x00007fff971af4f9} + 58 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor-CoreUObject.dll!FLinkerLoad::CreateExportAndPreload() {0x00007fff971afb7b} + 5 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor-CoreUObject.dll!FLinkerLoad::LoadAllObjects() {0x00007fff971d816a} + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor-CoreUObject.dll!LoadPackageInternal() {0x00007fff972b4943} + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor-UnrealEd.dll!UEditorEngine::Map_Load() {0x00007fff8cec9e25} + 29 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor-UnrealEd.dll!UEditorEngine::HandleMapCommand() {0x00007fff8ceb66f5} + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor-UnrealEd.dll!UEditorEngine::Exec() {0x00007fff8ce9ffd0} + 21 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor-UnrealEd.dll!UUnrealEdEngine::Exec() {0x00007fff8d2b5aa1} + 17 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor-UnrealEd.dll!FEditorFileUtils::LoadMap() {0x00007fff8cf46bb0} + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor-UnrealEd.dll!FEditorFileUtils::LoadDefaultMapAtStartup() {0x00007fff8cf4681e} + 56 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor-UnrealEd.dll!FUnrealEdMisc::OnInit() {0x00007fff8d2f6056} + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor-UnrealEd.dll!EditorInit() {0x00007fff8d2b3a8e} + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor.exe!GuardedMain() {0x00007ff7e6e9472e} + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor.exe!GuardedMainWrapper() {0x00007ff7e6e94a4a} + 5 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor.exe!WinMain() {0x00007ff7e6ea65c9} + 17 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou
UE4Editor.exe!__tmainCRTStartup() {0x00007ff7e6ea75d9} + 21 bytes [f:\dd\vctools\crt\crtw32\dllstuff\crtexe.c:618]
KERNEL32.DLL {0x00007fffc59a13d2} + 0 bytes
ntdll.dll {0x00007fffc8395454} + 0 bytes
ntdll.dll {0x00007fffc8395454} + 0 bytes

Every time I open up UE4, select which project to load I get this error and UE4 closes. Yesterday I was using the engine fine and I saved and exited, I come on today and get this for no reason. Please I am working on a big project and REALLY don’t want to lose it! I have something like 100+ hours clocked into it… Help would be FANTASTIC!

2

Hi, Usnia

I’m really sorry for the happening.
If I were you I would do this:

  1. First, backup your project and it’s dependencies
  2. Reinstall UE4
  3. Then create a new project
  4. Manually copy & paste your stuff into the folder (default on windows 7 is C:/Users/your user/Documents/Unreal Projects/your project)
    , UE4 will automatically display them for you (this will work, happened to me that i had to manually place things into my project).

Before doing these steps backup everything, I don’t want you to lose all your work.

I hope this helps

Nyul

3

How should I back it up? From OS>Program Files>Epic Games or from PC>Documents>Unreal Projects? And also thank you SO much for the help!

4

The directory where your project is, just move it or copy & paste it to another folder somewhere else (but i don’t exactly know should you backup it), But If you want to be sure your project doesn’t get deleted, just copy it somewhere else.

5

copy the whole project

6

But maybe you don’t even have to reinstall ue, maybe just your project bugged, you could try to backup your neccesary blueprints and create new project, the copy the files there.

7

remember, If the project is bugged don’t copy all files, only the neccesary blueprints, models, textures. If this does not work, do the above steps in my answer.

8

the project are at the Documents/Unreal Projects

9

Hi Usnia, any progress?