Packaged game crash

Development Programming & Scripting C++
1

Hello,

I’m keep getting crash on game start for packaged game. Engine version 4.24.2 and we are using Niagara system for particles. Had no issue like that before. Anyone knows what could be the issue?

After some investigation I’ve found that it could be related do this part of code not getting :

NiagaraShaderModule.SetOnRequestDefaultDataInterfaceHandler(INiagaraShaderModule::FOnRequestDefaultDataInterface::CreateLambda(](const FString& DIClassName) -> UNiagaraDataInterfaceBase*
{
return FNiagaraTypeRegistry::GetDefaultDataInterfaceByName(DIClassName);
}));

in Engine/Plugins/FX/Niagara/Source/NiagaraShader/Private/NiagaraModule.cpp] [Line: ]

Thanks,
Spectral

2

So after debugging packaged game it appears that first error was in completely different place. After fixing other bug initialization of Niagara was successful.

3

What was the first bug, how did you solve this, exactly?

I’m receiving the same error (post about it here) and have noticed if I turn my niagara system’s to CPU instead of GPU particles it doesn’t crash.

4

It was completely not related to this error. I’ve resolved that by injecting debugger before game start and finding actual problem (probably related to one of the initialization function).
How to do it: How to: Launch the Debugger Automatically | Microsoft Docs

5

After finding this post as I have exactly the same issue and after running the debugger what I found is below. It seems to me that the bug is still exactly what was said in the intial crash? Anyone have any ideas? Unreal 4.24.3

6

i have the same crash and when you make the emitter cpu the problem goes away, it turn’s out that the problem is when you have a hard reference for niagara particle system with GPU it crash the packaged game, and only for certain actor, for example:
i have hard reference of niagara particle system in the character class and another one in weapon class when you remove it from the weapon class the problem goes away.
try remove the particle from any reference and if the crash don’t happen try to use soft reference and see if that works.