UE4 crashes when I try to open my project

Development Programming & Scripting
1

Hi at all,

I worked til 20 o’clock on my project.
at 20 o’clock I played Rocket League for 1 hour.
After starting Epic Games Launcher and open my Project, it crashed.
It doesn’t even show my Project, only a crash report window.
It is a UE4 Bug.
I can’t open my Project, the Crash Report Window appears after I try to open it.

The Exception, which was stored in my Clipboard:
Assertion failed: (Index >= 0) & (Index < ArrayNum) [File:d:\build++ue4+release-4.19+compile\sync\engine\source\runtime\core\public\Containers/Array.h] [Line: 610]
Array index out of bounds: 0 from an array of size 0

0x00000000FD0FA06D KERNELBASE.dll!UnknownFunction []
0x00000000B11E7884 UE4Editor-ApplicationCore.dll!UnknownFunction []
0x00000000B4C06D9B UE4Editor-Core.dll!UnknownFunction []
0x00000000B4B41939 UE4Editor-Core.dll!UnknownFunction []
0x00000000B4563D99 UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B4544ED5 UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B4666775 UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B4668069 UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B452BADB UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B460A19A UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B4607067 UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000AC9FBA16 UE4Editor-UMG.dll!UnknownFunction []
0x00000000B2A0166A UE4Editor-Engine.dll!UnknownFunction []
0x00000000AE2BD23C UE4Editor-UnrealEd.dll!UnknownFunction []
0x00000000AAF4F302 UE4Editor-Kismet.dll!UnknownFunction []
0x00000000AAEE00DF UE4Editor-Kismet.dll!UnknownFunction []
0x00000000AAEDCA43 UE4Editor-Kismet.dll!UnknownFunction []
0x00000000B1C3C4F7 UE4Editor-Engine.dll!UnknownFunction []
0x00000000B439A918 UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B4553102 UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B4578A11 UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B4551862 UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B45534CB UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B4579714 UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B46B2CE6 UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B45A75BD UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B45A5ECF UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B45A77FB UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B45A5ECF UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B45A5D12 UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B455FDD1 UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B45A52F3 UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B45555BE UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B456DDD1 UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B46B2A9D UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B45A75BD UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B45A5ECF UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B45A77FB UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B45A5ECF UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B45A77FB UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B45A5ECF UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B45A5D12 UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B455FDD1 UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B45A52F3 UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B45555BE UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B456DDD1 UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B46B2A9D UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B45A75BD UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B45A5ECF UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B45A77FB UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B45A5ECF UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B45A5D12 UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B455FDD1 UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B45A52F3 UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B45555BE UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B456DDD1 UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B46B2A9D UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B45A75BD UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B45A5ECF UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B45A77FB UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B45A5ECF UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B45A77FB UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B45A5ECF UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B45A5D12 UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B455FDD1 UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B45A52F3 UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B45555BE UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B456DDD1 UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B46B2A9D UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000B46B2154 UE4Editor-CoreUObject.dll!UnknownFunction []
0x00000000ADEFD483 UE4Editor-UnrealEd.dll!UnknownFunction []
0x00000000ADEEEEC5 UE4Editor-UnrealEd.dll!UnknownFunction []
0x00000000ADED2FE2 UE4Editor-UnrealEd.dll!UnknownFunction []
0x00000000AE750389 UE4Editor-UnrealEd.dll!UnknownFunction []
0x00000000AE1D1E3B UE4Editor-UnrealEd.dll!UnknownFunction []
0x00000000AE1D1A8F UE4Editor-UnrealEd.dll!UnknownFunction []
0x00000000AE7084DE UE4Editor-UnrealEd.dll!UnknownFunction []
0x00000000AE6D3BA3 UE4Editor-UnrealEd.dll!UnknownFunction []
0x000000003FCF6AC6 UE4Editor.exe!UnknownFunction []
0x000000003FCF6C4A UE4Editor.exe!UnknownFunction []
0x000000003FD04149 UE4Editor.exe!UnknownFunction []
0x000000003FD05B57 UE4Editor.exe!UnknownFunction []
0x0000000076F859CD kernel32.dll!UnknownFunction []
0x00000000771BA561 ntdll.dll!UnknownFunction []
0x00000000771BA561 ntdll.dll!UnknownFunction []

UE4 Crash Reporter Window:

236292-ue4error.png
236292-ue4error.png849×667 67.5 KB

PS:
Yes, I added 2 Whitespaces to any line of that Exception, for visual reasons …

Thanks in advance for any kind of help.

[All Log Files from /Saved/Logs][2]

[Exception within the Crash Reporter, after enabling Debugging:][3]

2

Have you tried dropping a breakpoint on line 610 of Array.h and tracing through the call stack to isolate the crash culprit?

3

push comment

4

Right Click on “MyProject” → “Open” → Error.
Conclusion: It didn’t open the Project == it is a UE4 Bug (A Program, where I can make 0 adjustments)… Please just read my Problem…

5

Hello Halki,

This is most likely not a bug and is an error with your project, due to the “array out of bounds” message. The callstack that you are receiving is incomplete and does not have the proper information for anyone to assist you. Please use the Epic Games Launcher, click the Library tab, click the arrow beside “Launch” under your current engine version, Select the Options button and check the box for “Editor symbols for debugging”. This will allow for the callstack to be displayed properly instead of just listing “UnknownFunction”.

Also, in general, to receive assistance with issues like this, it would be best to provide that callstack alongside the logs from the project. You can find these logs in the project’s folder under Saved/Logs.

Edit: There is also no reason to hide your LoginID/EpicAccountID. It is not useful for anyone but our staff members.

6

Hi,
I added my latest Log-Files (. File).

7

From the error message, it seems to be related to an Array or possibly just a reference to the ProgressBarWidget or within the ProgressBarWidget itself. You could try adding your broken blueprint to a fresh project to see if it will open and try to debug what was wrong.

8

After I removed the ProgressBarWidget, the Project opens.
Now I’m a bit confused, why it crashed…
My Whole Project don’t work now… my references are all “destroyed”…

9

Thanks for the help, it works know (just needed to recreate every Reference, where I used my ProgressBarWidget).
Did you know, why it crashed?
I can’t see any errors while playing it.

10

The issue was related to loading/serialization so it’s not something you would see until you attempted to load the asset, such as when you reopen the project. Unfortunately there is no way to see this ahead of time without attempting to reload the assets.

11

[2018.04.05-12.42.10:669][ 0]LogProperty: Warning: Serialized Class /Script/CoreUObject.LinkerPlaceholderExportObject for a property of Class /Script/UMG.CanvasPanel. Reference will be nullptred.
Property = ObjectProperty /Game/Blueprints/UI/ProgressBarWidget.ProgressBarWidget_C:CanvasPanel_0
Item = LinkerPlaceholderExportObject /Game/Blueprints/UI/ProgressBarWidget.PLACEHOLDER-INST_of_ProgressBarWidget_C_0:PLACEHOLDER-INST_of_WidgetTree_1.PLACEHOLDER-INST_of_CanvasPanel_2
[2018.04.05-12.42.10:669][ 0]LogProperty: Warning: Serialized Class /Script/CoreUObject.LinkerPlaceholderExportObject for a property of Class /Script/UMG.ProgressBar. Reference will be nullptred.
Property = ObjectProperty /Game/Blueprints/UI/ProgressBarWidget.ProgressBarWidget_C:GenericProgressBar
Item = LinkerPlaceholderExportObject /Game/Blueprints/UI/ProgressBarWidget.PLACEHOLDER-INST_of_ProgressBarWidget_C_0:PLACEHOLDER-INST_of_WidgetTree_1.PLACEHOLDER-INST_of_ProgressBar_4

Looks like it could be an issue with one of your Widgets. I would suggest making backups of your Widget blueprints, removing them from the project temporarily, and attempting to open the project. It also seems that these logs are from before downloading the Editor Symbols for Debugging, as it still lists the functions in the callstack as “UnknownFunction”. Please provide the log from attempting to open the project after having the symbols installed.