Crashes on startup

Development Programming & Scripting
1

Hello.

The editor crashed after I added “BlueprintReadWrite” to some variables of my C++ player and added a new axis mapping to get the player to bounce when “HitNotify”, And BAM the editor crashes and crashes no mater what I have tried.

I have tried deleteing:
Intermediate files for the project(both in the project folder and in the editor folder)
The data caches (The editor crashes immediately if there are no caches)

And I have also tried verifying the installation which caused “UE4Editor-Kismet.dll” to be downloaded.

The error happens in UE4Editor-Engine.dll!Z_Construct_UFunction_UKismetInputLibrary_ControllerEvent_GetEffectingButton() Line 14666 C++

The closest file to the exception is “4.10\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectBase.cpp” at line 656

Output window:
Exception thrown at 0x0000000600000000 in UE4Editor.exe: 0xC0000005: Access violation executing location 0x0000000600000000.

Here is a snippet of the function:
/**

  • Load any outstanding compiled in default properties
    /
    static void UObjectLoadAllCompiledInDefaultProperties()
    {
    const bool bHaveRegistrants = GetDeferredCompiledInRegistration().Num() != 0;
    if( bHaveRegistrants )
    {
    TArray<class UClass ()()> PendingRegistrants;
    TArray<UClass    > NewClasses;
    PendingRegistrants = GetDeferredCompiledInRegistration();
    GetDeferredCompiledInRegistration().Empty();
    for(int32 RegistrantIndex = 0;RegistrantIndex < PendingRegistrants.Num();++RegistrantIndex)
    {
    NewClasses.Add(PendingRegistrantsRegistrantIndex); // <— Here is the error
    }

Callstack:
0000000600000000() Unknown
UE4Editor-Engine.dll!Z_Construct_UFunction_UKismetInputLibrary_ControllerEvent_GetEffectingButton() Line 14666 C++
UE4Editor-Engine.dll!Z_Construct_UClass_UKismetInputLibrary() Line 15652
UE4Editor-CoreUObject.dll!UObjectLoadAllCompiledInDefaultProperties() Line 656
UE4Editor-CoreUObject.dll!ProcessNewlyLoadedUObjects() Line 752
UE4Editor.exe!FEngineLoop::PreInit(const wchar_t * CmdLine) Line 1392
UE4Editor.exe!GuardedMain(const wchar_t * CmdLine, HINSTANCE__ * hInInstance, HINSTANCE__ * hPrevInstance, int nCmdShow) Line 110
UE4Editor.exe!WinMain(HINSTANCE__ * hInInstance, HINSTANCE__ * hPrevInstance, char * __formal, int nCmdShow) Line 189

I can upload the minidump if required (BTW The Send minidump buttons on crash don’t do anything for me)

Here is the last piece of the log file:
[2016.02.13-13.26.32:990][ 0]LogDerivedDataCache:Display: Max Cache Size: 512 MB
[2016.02.13-13.26.32:990][ 0]LogDerivedDataCache:Display: Starting with empty Boot cache
[2016.02.13-13.26.32:991][ 0]LogDerivedDataCache: FDerivedDataBackendGraph: Pak pak cache file C:/Users/Ryan Vermeulen/AppData/Local/UnrealEngine/4.10/DerivedDataCache/DDC.ddp not found, will not use a pak cache.
[2016.02.13-13.26.32:991][ 0]LogDerivedDataCache: Unable to find inner node Pak for hierarchical cache Hierarchy.
[2016.02.13-13.26.32:991][ 0]LogDerivedDataCache: FDerivedDataBackendGraph: CompressedPak pak cache file C:/Users/Ryan Vermeulen/AppData/Local/UnrealEngine/4.10/DerivedDataCache/Compressed.ddp not found, will not use a pak cache.
[2016.02.13-13.26.32:991][ 0]LogDerivedDataCache: Unable to find inner node CompressedPak for hierarchical cache Hierarchy.
[2016.02.13-13.26.33:071][ 0]LogDerivedDataCache:Display: Pak cache opened for reading …/…/…/Engine/DerivedDataCache/Compressed.ddp.
[2016.02.13-13.26.33:084][ 0]LogDerivedDataCache: Using Local data cache path C:/Users/Ryan Vermeulen/AppData/Local/UnrealEngine/Common/DerivedDataCache: Writable
[2016.02.13-13.26.33:599][ 0]LogWindows:Error: === Critical error: ===
Fatal error!

[2016.02.13-13.26.33:707][ 0]LogExit: Executing StaticShutdownAfterError
[2016.02.13-13.26.33:709][ 0]LogWindows: FPlatformMisc::RequestExit(1)
[2016.02.13-13.26.33:709][ 0]Log file closed, 02/13/16 15:26:33

I don’t know what else to do.
I would appreciate any help in getting the editor running again.

I am going to continue tinkering a bit more to see if I cannot locate the cause.

2

Restarting did the trick.
As I am a Programmer I really like to know why things do what they do, Especially crashing or unexpected behavior.
Anyone have any clue as to what was happening?

Edit: Should I mark this as solved? (And how do I do that?)

3

Hey ryan20fun-

I can mark your previous comment as an answer if you were able to work past the crash. If it is still available, could you post the log files from the crash to go along with the callstack? When you say Restarting helped, are you referring to restarting the editor or restarting Visual Studio?

Cheers

4

+I can mark your previous comment as an answer if you were able to work past the crash.
Yes, Please.

  • If it is still available, could you post the log files from the crash to go along with the callstack?
    I have shared the minidump and log here on Google drive(I see now that I could have just attached it to the reply)
    I have copied the callstack shown in the minidump in my post, Searching it for “Callstack: 0000000600000000() Unknown” should find it.

  • When you say Restarting helped, are you referring to restarting the editor or restarting Visual Studio?
    I mean Windows, I tried restarting VS and UE4 before.

I suppose if I used the Github branch and built the engine myself I would be able to find the exact source (more or less) myself, It could prove interesting as I have been the cause of most of the few editor crashes I have had.