Crashing whenever I try to open Level BluePrints

Development Programming & Scripting Blueprint
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1

Title pretty much says it. I don’t know what is going on. It would be great if someone could help me out. Here is error message:
MachineId:A1CDF2974FCAC491301B669E35999BFC
EpicAccountId:cfdcf17b535e4014bd811a6157449e45

Unknown exception - code 00000001 (first/second chance not available)

Fatal error: [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.7\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp] [Line: 1732]
Objects have same fully qualified name but different paths.
New Object: LevelScriptBlu

KERNELBASE + 24684 bytes
UE4Editor_Core!FOutputDeviceWindowsError::Serialize() + 292 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\windows\windowsplatformoutputdevices.cpp:95]
UE4Editor_Core!FMsg::Logf__VA() + 463 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\misc\outputdevice.cpp:526]
UE4Editor_CoreUObject!StaticAllocateObject() + 1087 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1732]
UE4Editor_CoreUObject!StaticConstructObject() + 785 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:2226]
UE4Editor_UnrealEd!FKismetEditorUtilities::CreateBlueprint() + 403 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\private\kismet2\kismet2.cpp:378]
UE4Editor_Engine!ULevel::GetLevelScriptBlueprint() + 288 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\level.cpp:1652]
UE4Editor_LevelEditor!FLevelEditorActionCallbacks::OpenLevelBlueprint() + 272 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\leveleditor\private\leveleditoractions.cpp:2041]
UE4Editor_LevelEditor!TBaseStaticDelegateInstance >::ExecuteIfSafe() + 41 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\public\delegates\delegateinstancesimpl_variadics.inl:921]
UE4Editor_Slate!FUICommandList::ExecuteAction() + 134 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\slate\private\framework\commands\uicommandlist.cpp:73]
UE4Editor_Slate!SMenuEntryBlock::OnClicked() + 960 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\slate\private\framework\multibox\smenuentryblock.cpp:883]
UE4Editor_Slate!SMenuEntryBlock::OnMenuItemButtonClicked() + 24 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\slate\private\framework\multibox\smenuentryblock.cpp:842]
UE4Editor_Slate!TMemberFunctionCaller::operator()<>() + 71 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\public\delegates\delegateinstanceinterface_variadics.h:161]
UE4Editor_Slate!TTupleImpl >::ApplyAfter_ExplicitReturnType >() + 25 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\public\delegates\tuple.h:113]
UE4Editor_Slate!TBaseSPMethodDelegateInstance<0,SMenuEntryBlock,0,FReply cdecl(void)>::Execute() + 89 bytes [d:\buildfarm\buildmachine++depot+ue4-releases+4.7\engine\source\runtime\core\public\delegates\delegateinstancesimpl_variadics.inl:282]
UE4Editor_Slate!TBaseDelegate::Execute() + 26 bytes [d:\buildfarm\buildmachine++depot+ue4-releases+4.7\engine\source\runtime\core\public\delegates\delegatesignatureimpl_variadics.inl:439]
UE4Editor_Slate!SButton::OnMouseButtonUp() + 339 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\slate\private\widgets\input\sbutton.cpp:228]
UE4Editor_Slate!::operator()() + 188 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:3985]
UE4Editor_Slate!FEventRouter::Route >() + 215 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:202]
UE4Editor_Slate!FSlateApplication::ProcessMouseButtonUpEvent() + 601 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:3988]
UE4Editor_Slate!FSlateApplication::OnMouseUp() + 294 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:3949]
UE4Editor_Core!FWindowsApplication::ProcessDeferredMessage() + 3573 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\windows\windowsapplication.cpp:1373]
UE4Editor_Core!FWindowsApplication::DeferMessage() + 318 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\windows\windowsapplication.cpp:1669]
UE4Editor_Core!FWindowsApplication::ProcessMessage() + 4016 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\windows\windowsapplication.cpp:742]
UE4Editor_Core!FWindowsApplication::AppWndProc() + 114 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\windows\windowsapplication.cpp:604]
user32 + 9268 bytes
user32 + 8855 bytes
UE4Editor_Core!FWindowsPlatformMisc::PumpMessages() + 118 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\windows\windowsplatformmisc.cpp:774]
UE4Editor!FEngineLoop::Tick() + 3737 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\launchengineloop.cpp:2233]
UE4Editor!GuardedMain() + 1404 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\launch.cpp:142]
UE4Editor!GuardedMainWrapper() + 26 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\windows\launchwindows.cpp:126]
UE4Editor!WinMain() + 249 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\windows\launchwindows.cpp:202]
UE4Editor!__tmainCRTStartup() + 329 bytes [f:\dd\vctools\crt\crtw32\dllstuff\crtexe.c:618]

2

Had an actor with same name as level. Just fixed it for anyone who has gotten same error as I did.

3

Hi Zito,

I’m glad you were able to fix issue in your project, but it shouldn’t have crashed. I’d like to enter a bug report, but I can’t seem to reproduce this here. What steps should I take to get same crash? I tried saving a new level in Maps folder and then creating an Actor BP with same name in Blueprints folder, dropping BP into level, and playing in editor. What were you doing when crash occurred? Are there any steps I missed?

4

I had same problem and Zito’s answer fixed it for me. In my case I had Level Blueprint and Matinee Actor with same name, in same folder. Playing in editor does not crash, but opening Level Blueprint does.

5

Hi Valkyrene,

Thanks for additional info, but I still can’t reproduce this crash. In a new project, I used Matinee > Add Matinee button in toolbar, then named new Matinee Actor Minimal_Default ( same as level name and Level Blueprint name). Opening Level Blueprint at this point didn’t crash editor. Am I missing a step somewhere?

6

It sounds correct. I tried reproducing crash myself; this crashes for me when I open level blueprint. By opening level blueprint I mean double-clicking to edit level blueprint. ErrorReproduction.

7

Thanks for test project! I got same crash in 4.7.6 by opening Level Blueprint. I also tested in our main internal branch and in 4.8 Preview 1, and it appears this no longer occurs. If you still have see this sort of thing occur in 4.8, please let us know. Thanks!