Unreal Engine 5.5.4 crash

[snyprrr]

Hello, when i try to open a VFX BP i just got this crash

Assertion failed: SystemInstanceController->IsSolo() [File:D:\build++UE5\Sync\Engine\Plugins\FX\Niagara\Source\Niagara\Private\NiagaraComponent.cpp] [Line: 863]

0x00007fff339fbb03 UnrealEditor-Niagara.dll!UnknownFunction
0x00007fff513f9447 UnrealEditor-Engine.dll!UnknownFunction
0x00007fff52cd9d06 UnrealEditor-Engine.dll!UnknownFunction
0x00007fff55262722 UnrealEditor-Core.dll!UnknownFunction
0x00007fff55257d4a UnrealEditor-Core.dll!UnknownFunction
0x00007fff552581ee UnrealEditor-Core.dll!UnknownFunction
0x00007fff552659aa UnrealEditor-Core.dll!UnknownFunction
0x00007fff52d34ea4 UnrealEditor-Engine.dll!UnknownFunction
0x00007fff52d4493d UnrealEditor-Engine.dll!UnknownFunction
0x00007fff51d0cf5f UnrealEditor-Engine.dll!UnknownFunction
0x00007fff51d159ec UnrealEditor-Engine.dll!UnknownFunction
0x00007fff4ca693a8 UnrealEditor-Kismet.dll!UnknownFunction
0x00007fff4eb54f23 UnrealEditor-UnrealEd.dll!UnknownFunction
0x00007fff4f7e42c6 UnrealEditor-UnrealEd.dll!UnknownFunction
0x00007ff7f8c26b47 UnrealEditor.exe!UnknownFunction
0x00007ff7f8c457ac UnrealEditor.exe!UnknownFunction
0x00007ff7f8c4589a UnrealEditor.exe!UnknownFunction
0x00007ff7f8c49114 UnrealEditor.exe!UnknownFunction
0x00007ff7f8c5bd04 UnrealEditor.exe!UnknownFunction
0x00007ff7f8c5f0ba UnrealEditor.exe!UnknownFunction
0x00007ff84672259d KERNEL32.DLL!UnknownFunction

If someone got this already pls !

[brs-sebascova]

Hello there @snyprrr!

Per your provided error, there’s a conflict with existing Niagara components in your project.

Is the VFX you are opening tied to a Niagara system? If so, try to disassociate from it, then re-open it. If the issue persists, remove that particular Niagara cluster (or all of Niagara if the error continues).

In case this approach fails, please check the following thread on a similar situation, and test their methods for your scenario:

500×500 2.84 KB

I created a [343718-qq图片20210710000716.png] Infinite life particle(with no update modules,just some random particle) [343719-qq图片20210710000927.png] and placed it under a static mesh like [343720-qq图片20210710001006.png] No physic enable,just static,all default setting,random crash when PIE like: Assertion failed: SystemInstance->IsSolo() I tried enable force solo,but not helping. Also I tried set solo = true in niagara’s instance every tick by C++,still not working,still got random cras…

[snyprrr]

Hello, sorry for the late answer.

My VFX Is like this

I saw that i have to force solo box on the previous thread but i can’t see where the option is.

If the option is in the blueprint, i can’t acces cause when i just open it unreal crash automaticaly

[snyprrr]

And thats how it work , there is a parent class who is mirrored to all and just the vfx/animal change