I don’t know why this would happen, I’m just spawning a niagara system for a bullet fx. PackagingResults: Error: appError called: Assertion failed: !bIsForCompilationOnly [File:D:\build++UE5\Sync\Engine\Plugins\FX\Niagara\Source\NiagaraEditor\Private\NiagaraGraph.cpp] [Line: 3886]
PackagingResults: Error: begin: stack for UAT
PackagingResults: Error: === Critical error: ===
PackagingResults: Error: Assertion failed: !bIsForCompilationOnly [File:D:\build++UE5\Sync\Engine\Plugins\FX\Niagara\Source\NiagaraEditor\Private\NiagaraGraph.cpp] [Line: 3886]
PackagingResults: Error: [Callstack] 0x00007ffc7ba17b67 UnrealEditor-NiagaraEditor.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffc7bb158de UnrealEditor-NiagaraEditor.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffc9f7a9fda UnrealEditor-CoreUObject.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffc9f8f73ea UnrealEditor-CoreUObject.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffc9f8f60a6 UnrealEditor-CoreUObject.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffc7b9b046f UnrealEditor-NiagaraEditor.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffc7baddfd3 UnrealEditor-NiagaraEditor.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffc7b87c8b0 UnrealEditor-NiagaraEditor.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffc7b87c352 UnrealEditor-NiagaraEditor.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffc7b877d66 UnrealEditor-NiagaraEditor.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffc7b9567d7 UnrealEditor-NiagaraEditor.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffc7b880fc6 UnrealEditor-NiagaraEditor.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffc7d1abdc4 UnrealEditor-Niagara.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffc7cd06601 UnrealEditor-Niagara.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffc7cd38977 UnrealEditor-Niagara.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffc7cd3a1ac UnrealEditor-Niagara.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffc7d2d51a0 UnrealEditor-Niagara.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffc7d2d6d45 UnrealEditor-Niagara.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffc7d3000b9 UnrealEditor-Niagara.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffc9901b3fb UnrealEditor-UnrealEd.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffc9904cf8f UnrealEditor-UnrealEd.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffc990515b8 UnrealEditor-UnrealEd.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffc990618c7 UnrealEditor-UnrealEd.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffc990611a5 UnrealEditor-UnrealEd.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffc98dbf780 UnrealEditor-UnrealEd.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffc98de16a3 UnrealEditor-UnrealEd.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ff6d0cdb0ce UnrealEditor-Cmd.exe!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ff6d0cd2688 UnrealEditor-Cmd.exe!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ff6d0cd296a UnrealEditor-Cmd.exe!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ff6d0cd5680 UnrealEditor-Cmd.exe!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ff6d0ce71b4 UnrealEditor-Cmd.exe!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ff6d0ce96f2 UnrealEditor-Cmd.exe!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffd44fa7614 KERNEL32.DLL!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffd45a226a1 ntdll.dll!UnknownFunction []
PackagingResults: Error: end: stack for UAT
PackagingResults: Error: Cook failed.
PackagingResults: Error: Unknown Cook Failure
Wow, that’s super weird. I was curious so I was looking at the engine source code where the error occurred, and it seems to most likely to be an engine bug, or there could be something very very wrong with your Niagara system that is being packaged.
It looks like it could be related to static switch variables in the Niagara system, so the first thing you might want to try is getting rid of the static switch variables in the system and see if that fixes it.
Otherwise, if I were in your situation, I would just make a new Niagara system from scratch, copy all the settings over so that it’s basically the same, delete the old system, and see if that fixes it.
Well now I removed the niagara files i migrated and it’s still reporting the same error… wtf? lol
edit: Had to resort to a backup, luckily it packages lol. Will try to manually make the niagara systems then, thanks.