Unreal crashes when Creating default subobjects

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#1

Hello,

so when I want to call CreateDefaultSubobjects<>(), it is fine, Visual Studio finds it. The lines

CapsuleComp = CreateDefaultSubobject<UCapsuleComponent>(TEXT("CapsuleCollider"));
RootComponent = CapsuleComp;

work fine but as soon as I add

BaseMesh = CreateDefaultSubobject<UStaticMeshComponent>(TEXT("BaseMesh"));

and compile it, Unreal crashes completely and doesn’t even show the dialog, it is just gone. When I attempt to reopen the project, Unreal stops at 75 % and just closes again.

When I remove the BaseMesh line and recompile, Unreal starts to open again.

Why and how to fix?

#2

Could you show the contents of the recent log in Saved > Logs

#3

Hello, the top of the log is as followed:

Log file open, 11/13/22 22:42:23
LogWindows: Failed to load 'aqProf.dll' (GetLastError=126)
LogWindows: File 'aqProf.dll' does not exist
LogProfilingDebugging: Loading WinPixEventRuntime.dll for PIX profiling (from ../../../Engine/Binaries/ThirdParty/Windows/WinPixEventRuntime/x64).
LogWindows: Failed to load 'VtuneApi.dll' (GetLastError=126)
LogWindows: File 'VtuneApi.dll' does not exist
LogWindows: Failed to load 'VtuneApi32e.dll' (GetLastError=126)
LogWindows: File 'VtuneApi32e.dll' does not exist
LogWindows: Started CrashReportClient (pid=15492)
LogConsoleResponse: Display: Failed to find resolution value strings in scalability ini. Falling back to default.
LogConsoleResponse: Display: Failed to find resolution value strings in scalability ini. Falling back to default.
LogInit: Display: Running engine for game: ToonTanks
LogCore: UnrealTraceServer: Trace store launch successful
LogCsvProfiler: Display: Metadata set : platform="Windows"
LogCsvProfiler: Display: Metadata set : config="Development"
LogCsvProfiler: Display: Metadata set : buildversion="++UE5+Release-5.0-CL-20979098"
LogCsvProfiler: Display: Metadata set : engineversion="5.0.3-20979098+++UE5+Release-5.0"
LogCsvProfiler: Display: Metadata set : commandline="" Q:\ToonTanks\ToonTanks.uproject""
LogCsvProfiler: Display: Metadata set : os="Windows 11 (22H2) [10.0.25236.1010] "
LogCsvProfiler: Display: Metadata set : cpu="AuthenticAMD|AMD Ryzen 9 5900X 12-Core Processor"
LogCsvProfiler: Display: Metadata set : pgoenabled="0"
LogCsvProfiler: Display: Metadata set : loginid="15b9262a49ef9e26ce9aba8442861404"
LogCsvProfiler: Display: Metadata set : llm="0"
LogPlatformFile: Not using cached read wrapper
LogStats: Stats thread started at 0.216253
LogICUInternationalization: ICU TimeZone Detection - Raw Offset: +1:00, Platform Override: ''
LogInit: Session CrashGUID >====================================================
         Session CrashGUID >   UECC-Windows-EE2A45774F70A893F8B2839A2AE4A55C
         Session CrashGUID >====================================================
#4

Could you please show the whole log? Use a site like pastebin.

#5

This is the log “ToonTanks.log” immediately after the successful compilation:
Unreal crash after CreateDefaultSubobject - Pastebin.com
Just to be sure that there is no mistake, this is the C++ Source code of BasePawn.cpp:
C++ class “BasePawn” - Pastebin.com

#6

Sorry for the late response. Could you try delete the Binaries and Intermediate folders and rebuild by attempting to reopen the project?

#7

It doesn’t help to delete the Binaries and Intermediate folders

#8

Would you mind posting the new logs that were generated from that? Hopefully they are different and give further insight.

#9

Of course, it is not a problem

#10

That’s more useful. Could you show the BasePawn.h and .cpp please?

#11

May I ask what you found out from the log?
BasePawn.h:

BasePawn.cpp:

#12 
[2022.11.18-15.22.42:095][533]LogWindows: Error: === Critical error: ===
[2022.11.18-15.22.42:095][533]LogWindows: Error: 
[2022.11.18-15.22.42:095][533]LogWindows: Error: Fatal error: [File:D:\build\++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\Obj.cpp] [Line: 118] 
[2022.11.18-15.22.42:095][533]LogWindows: Error: Using incorrect object initializer.
[2022.11.18-15.22.42:095][533]LogWindows: Error: 
[2022.11.18-15.22.42:095][533]LogWindows: Error: 
[2022.11.18-15.22.42:095][533]LogWindows: Error: 
[2022.11.18-15.22.42:095][533]LogWindows: Error: 
[2022.11.18-15.22.42:095][533]LogWindows: Error: [Callstack] 0x00007ffd37dd2eee UnrealEditor-CoreUObject.dll!UnknownFunction []
[2022.11.18-15.22.42:095][533]LogWindows: Error: [Callstack] 0x00007ffc85121887 UnrealEditor-ToonTanks-0002.dll!ABasePawn::ABasePawn() [Q:\ToonTanks\Source\ToonTanks\Private\BasePawn.cpp:23]

The last line effectively saying there’s something wrong with your constructor code on line 23 and if you look at that line you have

TurretMesh->CreateDefaultSubobject<UStaticMeshComponent>(TEXT("TurretMesh"));

which is your error. You want to assign TurretMesh (which is currently uninitialised at this point) not call a function on it. That line should be

TurretMesh = CreateDefaultSubobject<UStaticMeshComponent>(TEXT("TurretMesh"));

The base pawn should be creating the static mesh component, not the mesh component itself.

2 Likes
#13

Oh god, such a little typo! Thank you very much sir, it works now :grinning_face_with_smiling_eyes:

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