Packaging error: Illegal reference to private object: 'DNAAsset

ddibb
Thu, 14 Aug 2025 10:21:24 +0000
Programming & Scripting

Getting this error while trying to cook my game. I’m using Metahumans together with Customizable Objects from the Mutable plugin and the RigLogic Extensions for Mutable.

Any way to fix this while retaining the DNA asset? Because I think it’s needed for facial animations to work.

UATHelper: Cooking (Windows): Referencers of DNAAsset /Game/MetaHumans/Joolag/Face/SKM_MHC_Joolag_FaceMesh.SKM_MHC_Joolag_FaceMesh:DNAAsset_0:
PackagingResults: Warning:     SkeletalMesh /Game/MetaHumans/Sandrie/Face/SKM_MHC_Sandrie_FaceMesh.SKM_MHC_Sandrie_FaceMesh (1 refs)
PackagingResults: Warning:         0) ObjectProperty /Script/Engine.SkeletalMesh:AssetUserData.AssetUserData
PackagingResults: Warning:     ModelResources /Game/GamePlay/Creatures/Humanoid/Mutable/CO_Humanoid.CO_Humanoid:0000000001B9DE18498105D83C6A629AWindows (1 refs)
PackagingResults: Warning:         0) ObjectProperty /Script/RigLogicMutable.DNAPinData:DNAAsset
UATHelper: Cooking (Windows): LogSavePackage: Warning:     SkeletalMesh /Game/MetaHumans/Joolag/Face/SKM_MHC_Joolag_FaceMesh.SKM_MHC_Joolag_FaceMesh (1 refs)
UATHelper: Cooking (Windows): LogSavePackage: Warning:         0) ObjectProperty /Script/Engine.SkeletalMesh:AssetUserData.AssetUserData
UATHelper: Cooking (Windows): LogSavePackage: Warning:     ModelResources /Game/GamePlay/Creatures/Humanoid/Mutable/CO_Humanoid.CO_Humanoid:0000000001B9DE18498105D83C6A629AWindows (1 refs)
UATHelper: Cooking (Windows): LogSavePackage: Warning:         0) ObjectProperty /Script/RigLogicMutable.DNAPinData:DNAAsset
PackagingResults: Warning:     SkeletalMesh /Game/MetaHumans/Joolag/Face/SKM_MHC_Joolag_FaceMesh.SKM_MHC_Joolag_FaceMesh (1 refs)
PackagingResults: Warning:         0) ObjectProperty /Script/Engine.SkeletalMesh:AssetUserData.AssetUserData
PackagingResults: Warning:     ModelResources /Game/GamePlay/Creatures/Humanoid/Mutable/CO_Humanoid.CO_Humanoid:0000000001B9DE18498105D83C6A629AWindows (1 refs)
PackagingResults: Warning:         0) ObjectProperty /Script/RigLogicMutable.DNAPinData:DNAAsset
UATHelper: Cooking (Windows): LogWindows: Error: appError called: Can't save 'E:/Users/Damir/Documents/Unreal Projects/ProjectFate5.6/Saved/Cooked/Windows/ProjectFate/Content/GamePlay/Creatures/Humanoid/Mutable/CO_Humanoid.uasset': Illegal reference to private object: 'DNAAsset /Game/MetaHumans/Joolag/Face/SKM_MHC_Joolag_FaceMesh.SKM_MHC_Joolag_FaceMesh:DNAAsset_0' referenced by '0000000001B9DE18498105D83C6A629AWindows' (at '/Game/GamePlay/Creatures/Humanoid/Mutable/CO_Humanoid.CO_Humanoid') in its 'DNAAsset' property.
UATHelper: Cooking (Windows): LogShaderCompilers: Display: Job TBasePassPSFCachedVolumeIndirectLightingPolicyForceVelocity(permutation 0, format PCD3D_SM6) compile time exceeded threshold (50.043s)
UATHelper: Cooking (Windows): LogShaderCompilers: Display: Job TBasePassPSFPrecomputedVolumetricLightmapLightingPolicySkylight(permutation 0, format PCD3D_SM6) compile time exceeded threshold (31.333s)
UATHelper: Cooking (Windows): LogShaderCompilers: Display: Job TBasePassPSFNoLightMapPolicySkylight(permutation 0, format PCD3D_SM6) compile time exceeded threshold (37.090s)
UATHelper: Cooking (Windows): LogShaderCompilers: Display: Job TBasePassPSFPrecomputedVolumetricLightmapLightingPolicy(permutation 0, format PCD3D_SM6) compile time exceeded threshold (43.137s)
UATHelper: Cooking (Windows): LogShaderCompilers: Display: Job TBasePassPSFCachedVolumeIndirectLightingPolicyForceVelocity(permutation 0, format PCD3D_SM6) compile time exceeded threshold (73.986s)
UATHelper: Cooking (Windows): LogWindows: Error: begin: stack for UAT
UATHelper: Cooking (Windows): LogWindows: Error: === Critical error: ===
UATHelper: Cooking (Windows): LogWindows: Error:
UATHelper: Cooking (Windows): LogWindows: Error: Can't save 'E:/Users/Damir/Documents/Unreal Projects/ProjectFate5.6/Saved/Cooked/Windows/ProjectFate/Content/GamePlay/Creatures/Humanoid/Mutable/CO_Humanoid.uasset': Illegal reference to private object: 'DNAAsset /Game/MetaHumans/Joolag/Face/SKM_MHC_Joolag_FaceMesh.SKM_MHC_Joolag_FaceMesh:DNAAsset_0' referenced by '0000000001B9DE18498105D83C6A629AWindows' (at '/Game/GamePlay/Creatures/Humanoid/Mutable/CO_Humanoid.CO_Humanoid') in its 'DNAAsset' property.
UATHelper: Cooking (Windows): LogWindows: Error:
UATHelper: Cooking (Windows): LogWindows: Error:
UATHelper: Cooking (Windows): LogWindows: Error: end: stack for UAT
PackagingResults: Error: appError called: Can't save 'E:/Users/Damir/Documents/Unreal Projects/ProjectFate5.6/Saved/Cooked/Windows/ProjectFate/Content/GamePlay/Creatures/Humanoid/Mutable/CO_Humanoid.uasset': Illegal reference to private object: 'DNAAsset /Game/MetaHumans/Joolag/Face/SKM_MHC_Joolag_FaceMesh.SKM_MHC_Joolag_FaceMesh:DNAAsset_0' referenced by '0000000001B9DE18498105D83C6A629AWindows' (at '/Game/GamePlay/Creatures/Humanoid/Mutable/CO_Humanoid.CO_Humanoid') in its 'DNAAsset' property.
PackagingResults: Error: begin: stack for UAT
PackagingResults: Error: === Critical error: ===
PackagingResults: Error: Can't save 'E:/Users/Damir/Documents/Unreal Projects/ProjectFate5.6/Saved/Cooked/Windows/ProjectFate/Content/GamePlay/Creatures/Humanoid/Mutable/CO_Humanoid.uasset': Illegal reference to private object: 'DNAAsset /Game/MetaHumans/Joolag/Face/SKM_MHC_Joolag_FaceMesh.SKM_MHC_Joolag_FaceMesh:DNAAsset_0' referenced by '0000000001B9DE18498105D83C6A629AWindows' (at '/Game/GamePlay/Creatures/Humanoid/Mutable/CO_Humanoid.CO_Humanoid') in its 'DNAAsset' property.
PackagingResults: Error: end: stack for UAT

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