Hey all,
I’ve been wracking my brain these last few days trying to figure out why I’m starting to get these warnings and errors appear in my project.
PackagingResults: Warning: Unable to load PE_FireTrail_GEN_VARIABLE with outer BlueprintGeneratedClass /Game/Assets/Equipment/Luca_Items/SimpleStaff/blueprints/BP_StaffTest.BP_StaffTest_C because its class (NiagaraComponent) does not exist
PackagingResults: Warning: Unable to load NawalaVisual_Niagara_GEN_VARIABLE with outer BlueprintGeneratedClass /Game/Characters/Player/BluePrints/BP_LucaPlayer.BP_LucaPlayer_C because its class (NiagaraComponent) does not exist
PackagingResults: Warning: Unable to load NPS_JumpingParticle_GEN_VARIABLE with outer BlueprintGeneratedClass /Game/Characters/Player/BluePrints/BP_LucaPlayer.BP_LucaPlayer_C because its class (NiagaraComponent) does not exist
PackagingResults: Warning: Unable to load NPS_MudSlide_GEN_VARIABLE with outer BlueprintGeneratedClass /Game/Characters/Player/BluePrints/BP_LucaPlayer.BP_LucaPlayer_C because its class (NiagaraComponent) does not exist
PackagingResults: Error: ParseObjectPropertyValue Error: RequiredMetaClass is null, for property: ObjectProperty /Game/GameComponents/Struct_NiagaraUserParameters.Struct_NiagaraUserParameters:Component_12_B1674D0848E5F061956C91A4B32F4954
PackagingResults: Warning: Unable to load ParticleSystem_GEN_VARIABLE with outer BlueprintGeneratedClass /Game/Assets/Items/Essence/BP_Essence_Master.BP_Essence_Master_C because its class (NiagaraComponent) does not exist
PackagingResults: Warning: Unable to load Scale Alpha.FloatCurve with outer NiagaraNodeInput /Game/Assets/FX/Particles/Niagara_test/NPS_BreakSparks.NPS_BreakSparks:DirectionalBurst.NiagaraScriptSource_0.NiagaraGraph_0.NiagaraNodeInput_0 because its class (NiagaraDataInterfaceCurve) does not exist
PackagingResults: Warning: Unable to load FloatFromCurve001_FloatCurve with outer NiagaraNodeInput /Game/Assets/FX/Particles/Niagara_test/NPS_BreakSparks.NPS_BreakSparks:Ring_2.NiagaraScriptSource_0.NiagaraGraph_0.NiagaraNodeInput_1 because its class (NiagaraDataInterfaceCurve) does not exist
PackagingResults: Warning: Unable to load FloatFromCurve004_FloatCurve with outer NiagaraNodeInput /Game/Assets/FX/Particles/Niagara_test/NPS_BreakSparks.NPS_BreakSparks:Ring_2.NiagaraScriptSource_0.NiagaraGraph_0.NiagaraNodeInput_10 because its class (NiagaraDataInterfaceCurve) does not exist
PackagingResults: Warning: Unable to load FloatFromCurve003_FloatCurve with outer NiagaraNodeInput /Game/Assets/FX/Particles/Niagara_test/NPS_BreakSparks.NPS_BreakSparks:Ring_2.NiagaraScriptSource_0.NiagaraGraph_0.NiagaraNodeInput_11 because its class (NiagaraDataInterfaceCurve) does not exist
PackagingResults: Warning: Unable to load ScaleSpriteSize_Uniform_Curve_Sprite_Scale with outer NiagaraNodeInput /Game/Assets/FX/Particles/Niagara_test/NPS_BreakSparks.NPS_BreakSparks:Ring_2.NiagaraScriptSource_0.NiagaraGraph_0.NiagaraNodeInput_6 because its class (NiagaraDataInterfaceCurve) does not exist
PackagingResults: Warning: Unable to load FloatFromCurve_FloatCurve with outer NiagaraNodeInput /Game/Assets/FX/Particles/Niagara_test/NPS_BreakSparks.NPS_BreakSparks:Ring_2.NiagaraScriptSource_0.NiagaraGraph_0.NiagaraNodeInput_8 because its class (NiagaraDataInterfaceCurve) does not exist
PackagingResults: Warning: Unable to load FloatFromCurve002_FloatCurve with outer NiagaraNodeInput /Game/Assets/FX/Particles/Niagara_test/NPS_BreakSparks.NPS_BreakSparks:Ring_2.NiagaraScriptSource_0.NiagaraGraph_0.NiagaraNodeInput_9 because its class (NiagaraDataInterfaceCurve) does not exist
PackagingResults: Warning: Unable to load NPS_BreakSparks with outer Package /Game/Assets/FX/Particles/Niagara_test/NPS_BreakSparks because its class (NiagaraSystem) does not exist
PackagingResults: Warning: Unable to load Scale Alpha.FloatCurve with outer NiagaraNodeInput /Game/Assets/FX/Particles/NPS_SimpleSparks.NPS_SimpleSparks:DirectionalBurst.NiagaraScriptSource_0.NiagaraGraph_0.NiagaraNodeInput_0 because its class (NiagaraDataInterfaceCurve) does not exist
PackagingResults: Warning: Unable to load NiagaraDataInterfaceCurve_4 with outer NiagaraScript /Game/Assets/FX/Particles/NPS_SimpleSparks.NPS_SimpleSparks:DirectionalBurst.SpawnScript because its class (NiagaraDataInterfaceCurve) does not exist
PackagingResults: Warning: Unable to load NiagaraDataInterfaceCurve_4 with outer NiagaraScript /Game/Assets/FX/Particles/NPS_SimpleSparks.NPS_SimpleSparks:DirectionalBurst.UpdateScript because its class (NiagaraDataInterfaceCurve) does not exist
PackagingResults: Warning: Unable to load NPS_SimpleSparks with outer Package /Game/Assets/FX/Particles/NPS_SimpleSparks because its class (NiagaraSystem) does not exist
PackagingResults: Warning: Unable to load NPSE_Essence with outer Package /Game/Assets/FX/Particles/NPSE_Essence because its class (NiagaraSystem) does not exist
PackagingResults: Warning: Unable to load FloatFromCurve_FloatCurve with outer NiagaraNodeInput /Game/Assets/FX/Particles/NPSE_Essence.NPSE_Essence:Empty.NiagaraScriptSource_0.NiagaraGraph_0.NiagaraNodeInput_10 because its class (NiagaraDataInterfaceCurve) does not exist
PackagingResults: Warning: Unable to load FloatFromCurve003_FloatCurve with outer NiagaraNodeInput /Game/Assets/FX/Particles/NPSE_Essence.NPSE_Essence:Empty.NiagaraScriptSource_0.NiagaraGraph_0.NiagaraNodeInput_7 because its class (NiagaraDataInterfaceCurve) does not exist
PackagingResults: Warning: Unable to load NiagaraDataInterfaceCurve_4 with outer NiagaraScript /Game/Assets/FX/Particles/NPSE_Essence.NPSE_Essence:Empty.SpawnScript because its class (NiagaraDataInterfaceCurve) does not exist
PackagingResults: Warning: Unable to load NiagaraDataInterfaceCurve_5 with outer NiagaraScript /Game/Assets/FX/Particles/NPSE_Essence.NPSE_Essence:Empty.SpawnScript because its class (NiagaraDataInterfaceCurve) does not exist
PackagingResults: Warning: Unable to load NiagaraDataInterfaceCurve_4 with outer NiagaraScript /Game/Assets/FX/Particles/NPSE_Essence.NPSE_Essence:Empty.UpdateScript because its class (NiagaraDataInterfaceCurve) does not exist
PackagingResults: Warning: Unable to load NiagaraDataInterfaceCurve_5 with outer NiagaraScript /Game/Assets/FX/Particles/NPSE_Essence.NPSE_Essence:Empty.UpdateScript because its class (NiagaraDataInterfaceCurve) does not exist
PackagingResults: Warning: Unable to load CoreParameters with outer Package /Niagara/ParameterDefinitions/CoreParameters because its class (NiagaraParameterDefinitions) does not exist
PackagingResults: Warning: Unable to load MeshRenderer with outer Package /Niagara/ParameterDefinitions/MeshRenderer because its class (NiagaraParameterDefinitions) does not exist
PackagingResults: Warning: Unable to load RibbonRenderer with outer Package /Niagara/ParameterDefinitions/RibbonRenderer because its class (NiagaraParameterDefinitions) does not exist
PackagingResults: Warning: Unable to load SpriteRenderer with outer Package /Niagara/ParameterDefinitions/SpriteRenderer because its class (NiagaraParameterDefinitions) does not exist
PackagingResults: Warning: Unable to load NormalizedExecutionIndex with outer Package /Niagara/Functions/NormalizedExecutionIndex because its class (NiagaraScript) does not exist
PackagingResults: Warning: Unable to load ReturnNormalizedExecIndex with outer Package /Niagara/DynamicInputs/Execution/ReturnNormalizedExecIndex because its class (NiagaraScript) does not exist
PackagingResults: Warning: Unable to load Multiply_Float with outer Package /Niagara/DynamicInputs/Multiply/Multiply_Float because its class (NiagaraScript) does not exist
PackagingResults: Warning: Unable to load MakeVector with outer Package /Niagara/DynamicInputs/TypeConversions/MakeVector because its class (NiagaraScript) does not exist
PackagingResults: Warning: Unable to load RandomRangeFloat with outer Package /Niagara/DynamicInputs/UniformRange/V2/RandomRangeFloat because its class (NiagaraScript) does not exist
PackagingResults: Warning: Unable to load NiagaraDataInterfaceColorCurve_1 with outer NiagaraNodeInput /Niagara/DynamicInputs/ValueFromCurve/ColorFromCurve.ColorFromCurve:NiagaraScriptSource_0.NiagaraGraph_0.NiagaraNodeInput_38 because its class (NiagaraDataInterfaceColorCurve) does not exist
PackagingResults: Warning: Unable to load ColorFromCurve with outer Package /Niagara/DynamicInputs/ValueFromCurve/ColorFromCurve because its class (NiagaraScript) does not exist
PackagingResults: Warning: Unable to load DefaultCurve with outer NiagaraNodeInput /Niagara/DynamicInputs/ValueFromCurve/FloatFromCurve.FloatFromCurve:NiagaraScriptSource_0.NiagaraGraph_0.NiagaraNodeInput_67 because its class (NiagaraDataInterfaceCurve) does not exist
PackagingResults: Warning: Unable to load FloatFromCurve with outer Package /Niagara/DynamicInputs/ValueFromCurve/FloatFromCurve because its class (NiagaraScript) does not exist
PackagingResults: Warning: Unable to load ScaleSpawnCountCurve with outer NiagaraNodeInput /Niagara/Modules/Emitter/EmitterState.EmitterState:NiagaraScriptSource_0.NiagaraGraph_0.NiagaraNodeInput_2 because its class (NiagaraDataInterfaceCurve) does not exist
PackagingResults: Warning: Unable to load EmitterState with outer Package /Niagara/Modules/Emitter/EmitterState because its class (NiagaraScript) does not exist
PackagingResults: Warning: Unable to load SpawnBurst_Instantaneous with outer Package /Niagara/Modules/Emitter/SpawnBurst_Instantaneous because its class (NiagaraScript) does not exist
PackagingResults: Warning: Unable to load RandomRangeFloat with outer Package /Niagara/Functions/RandomRangeFloat because its class (NiagaraScript) does not exist
PackagingResults: Warning: Unable to load SpawnRate with outer Package /Niagara/Modules/Emitter/SpawnRate because its class (NiagaraScript) does not exist
PackagingResults: Warning: Unable to load SolveForcesAndVelocity with outer Package /Niagara/Modules/Solvers/SolveForcesAndVelocity because its class (NiagaraScript) does not exist
PackagingResults: Warning: Unable to load InitializeParticle with outer Package /Niagara/Modules/Spawn/Initialization/V2/InitializeParticle because its class (NiagaraScript) does not exist
PackagingResults: Warning: Unable to load LatheCurve with outer NiagaraNodeInput /Niagara/Modules/Spawn/Location/V2/ShapeLocation.ShapeLocation:NiagaraScriptSource_0.NiagaraGraph_0.NiagaraNodeInput_1 because its class (NiagaraDataInterfaceCurve) does not exist
PackagingResults: Warning: Unable to load LatheCurve with outer NiagaraNodeInput /Niagara/Modules/Spawn/Location/V2/ShapeLocation.ShapeLocation:NiagaraScriptSource_1.NiagaraGraph_0.NiagaraNodeInput_1 because its class (NiagaraDataInterfaceCurve) does not exist
PackagingResults: Warning: Unable to load ShapeLocation with outer Package /Niagara/Modules/Spawn/Location/V2/ShapeLocation because its class (NiagaraScript) does not exist
PackagingResults: Warning: Unable to load DirectionAndLengthSafe with outer Package /Niagara/Functions/DirectionAndLengthSafe because its class (NiagaraScript) does not exist
PackagingResults: Warning: Unable to load TransformVector with outer Package /Niagara/Functions/Localspace/TransformVector because its class (NiagaraScript) does not exist
PackagingResults: Warning: Unable to load FindQuatBetween with outer Package /Niagara/Functions/Rotation/FindQuatBetween because its class (NiagaraScript) does not exist
PackagingResults: Warning: Unable to load MatrixToQuaternion with outer Package /Niagara/Functions/Rotation/MatrixToQuaternion because its class (NiagaraScript) does not exist
PackagingResults: Warning: Unable to load MultiplyQuaternion with outer Package /Niagara/Functions/Rotation/MultiplyQuaternion because its class (NiagaraScript) does not exist
PackagingResults: Warning: Unable to load CalculateRandomRange with outer Package /Niagara/Functions/V2/CalculateRandomRange because its class (NiagaraScript) does not exist
PackagingResults: Warning: Unable to load RandomQuaternion with outer Package /Niagara/Functions/Rotation/RandomQuaternion because its class (NiagaraScript) does not exist
PackagingResults: Warning: Unable to load ApplyRotationVector with outer Package /Niagara/Modules/Solvers/ApplyRotationVector because its class (NiagaraScript) does not exist
And many more. It’s obviously something to do with the Niagara Particle system I am using.
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Some extra context. I originally came from 5.2 and updated my project to 5.4.2.
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My game crashed un-expectedly when play testing in the PIE
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When opening it back, it kept giving me non-stop crash reports to send to Epic talking about ’ [Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0000000x00000000] which I know is not helpful. I can provide the crash report if needed, but I feel it doesn’t show much going on.
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I read on the forums that I should clear my DDC, and other folds in my project (i.e. 'Binaries, Build, DDC, Intermediate, and a few specific files within the ‘saved’ folder).
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I also jumped into my AppData folder and deleted the entire 5.4 folder based on this topic here - Folders safe to delete to recompile everything - #2 by L1z4rD89
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The compiling ends with a ton of these errors:
PackagingResults: Error: begin: stack for UAT
PackagingResults: Error: === Critical error: ===
PackagingResults: Error: Fatal error!
PackagingResults: Error: Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x0000000000000000
PackagingResults: Error: [Callstack] 0x00007ffffc7d4df0 UnrealEditor-AnimGraph.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffffc71f974 UnrealEditor-AnimGraph.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffffc745b64 UnrealEditor-AnimGraph.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ff8a13a8a62 UnrealEditor-Kismet.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ff8a13ae90f UnrealEditor-Kismet.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ff8a13acc87 UnrealEditor-Kismet.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ff8b182a570 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ff8b1b62e9f UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ff8b1b8c2cd UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ff8b1b61564 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ff8b1b6333b UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ff8b1b8d299 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ff8b1dcc8b2 UnrealEditor-CoreUObject.dll!UnknownFunction -
I’ve tried to re-create a few Niagara Particle system, but the error still identifies the new NPS
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I’ve tried to replace the ‘Struct’ outlined in the error as well, replacing all dependencies, but this didn’t work either.
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I’ve checked the 'Plugin’s folder where all the Niagara scripts are, and I can clearly see the identified missing scripts there (i.e. the NiagaraDataInterfaceCurve):
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One time, I closed the game, and re-opened it, and I couldn’t even open the NPS because it was missing references.
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The game works flawlessly in the PIE, and it sonly when I try to cook/package the game is where I get these errors.
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Here are the error reports when I first load the game;
Hopefully this is enough information to help out, but please let me know if you need any more from me, always happy to provide info to fix these issues.
Cheers,