Error during cooking. To the rescue. "Custom Property List Not Initialized"

943023 · June 4, 2025, 9:28am

I recently updated to UE 5.6 on Windows and i’m getting this while test cooking my project. I have no clue and can’t find help so far. Thanks in advance. Error doesn’t happen in 5.5

UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: begin: stack for UAT

UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: === Handled ensure: ===

UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error:

UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: Ensure condition failed: bCustomPropertyListForPostConstructionInitialized [File:D:\build\++UE5\Sync\Engine\Source\Runtime\Engine\Private\BlueprintGeneratedClass.cpp] [Line: 1242]

UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: Custom Property List Not Initialized for /Game/DamageSystem/BPC_DamageSystem.BPC_DamageSystem_C

UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: Stack:

UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffe59151434 UnrealEditor-Engine.dll!UnknownFunction []

UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffe56abe164 UnrealEditor-Engine.dll!UnknownFunction []

UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffe61489f3f UnrealEditor-CoreUObject.dll!UnknownFunction []

UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffe61492536 UnrealEditor-CoreUObject.dll!UnknownFunction []

UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffe61466cf9 UnrealEditor-CoreUObject.dll!UnknownFunction []

UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffe614a809e UnrealEditor-CoreUObject.dll!UnknownFunction []

UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffe611aa46e UnrealEditor-CoreUObject.dll!UnknownFunction []

UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffe611ac01f UnrealEditor-CoreUObject.dll!UnknownFunction []

UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffe60ec2b23 UnrealEditor-CoreUObject.dll!UnknownFunction []

UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffe60e9d105 UnrealEditor-CoreUObject.dll!UnknownFunction []

UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffe611e1b85 UnrealEditor-CoreUObject.dll!UnknownFunction []

UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffe611aa935 UnrealEditor-CoreUObject.dll!UnknownFunction []

UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffe60ec53f1 UnrealEditor-CoreUObject.dll!UnknownFunction []

UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffe60ec3246 UnrealEditor-CoreUObject.dll!UnknownFunction []

UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffe60ec2c8f UnrealEditor-CoreUObject.dll!UnknownFunction []

UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffe611e1b76 UnrealEditor-CoreUObject.dll!UnknownFunction []

UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffe60ea139d UnrealEditor-CoreUObject.dll!UnknownFunction []

UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffe60e959dc UnrealEditor-CoreUObject.dll!UnknownFunction []

UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffe611a921e UnrealEditor-CoreUObject.dll!UnknownFunction []

UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffe611aae4b UnrealEditor-CoreUObject.dll!UnknownFunction []

UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffe60eb789d UnrealEditor-CoreUObject.dll!UnknownFunction []

UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffe60e9d2cd UnrealEditor-CoreUObject.dll!UnknownFunction []

UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffe60e9d0fd UnrealEditor-CoreUObject.dll!UnknownFunction []

UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffe611d7f9b UnrealEditor-CoreUObject.dll!UnknownFunction []

UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffe611a88bd UnrealEditor-CoreUObject.dll!UnknownFunction []

brs-sebascova · June 4, 2025, 6:20pm

Hello there @943023!

Considering that 5.6 has just been released, it is prone to have unexpected issues. Still, we can try a few steps for resolution here:

Since the error is tied to BPC_DamageSystem, test by re-compiling it, and check the output log for warnings
Perform a redirector fix from Content root
Clear cache for any old elements present from 5.5, via deleting folders Saved, Intermediate, and DerivedDataCache, then attempt to cook again

943023 · June 4, 2025, 6:31pm

1 and 2 makes no difference.
3 and i get “The LiveLinkHub.target file does not exist. Would you like to build the editor?” message on startup. Which i have to choose no, yes just doesn’t do anything.
How to fix this new issue?

Oh and the same error still occurs during cooking.

Thanks for your time so far. @brs-sebascova

Sadly still not able to cook my project.

943023 · June 5, 2025, 6:00pm

Found the solution. Just renaming BPC_DamageSystem to something else solved the issue.

YellowJelloTD · July 6, 2025, 10:35am

Running into the same error. Renaming did not solve my issue :(. Any other ideas? I renamed from BPC_Damageable to BPC_DamageSystem and fixed redirectors. I also noticed all my variables on that BPC get set to 0 every time i restart the editor, no idea why, reseting the values makes it work in PIE until i restart editor again and need to do the same.

in 5.6 as well

UATHelper: Packaging (Windows): LogOutputDevice: Error: begin: stack for UAT
UATHelper: Packaging (Windows): LogOutputDevice: Error: === Handled ensure: ===
UATHelper: Packaging (Windows): LogOutputDevice: Error:
UATHelper: Packaging (Windows): LogOutputDevice: Error: Ensure condition failed: bCustomPropertyListForPostConstructionInitialized [File:D:\build++UE5\Sync\Engine\Source\Runtime\Engine\Private\BlueprintGeneratedClass.cpp] [Line: 1242]
UATHelper: Packaging (Windows): LogOutputDevice: Error: Custom Property List Not Initialized for /Game/System/Combat/Damageable/BPC_DamageSystem.BPC_DamageSystem_C
UATHelper: Packaging (Windows): LogOutputDevice: Error: Stack:
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb6b291434 UnrealEditor-Engine.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb68bfe164 UnrealEditor-Engine.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb90b39f3f UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb90b42536 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb90b16cf9 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb90b5809e UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb9085a46e UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb9085c01f UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb90572b23 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb9054d105 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb90891b85 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb9085a935 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb9085c01f UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb905753f1 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb90573246 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb90572c8f UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb9054d105 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb9055139d UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb905459dc UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb9085921e UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb9085ae4b UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb9056789d UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb9054d2cd UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb9054d0fd UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb90891b85 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb9085a935 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb9085c01f UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb905753f1 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb90573246 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb90572c8f UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb9054d105 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb90891b85 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb9085a935 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb9085c01f UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb905753f1 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb90573246 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb90891b76 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb9085a935 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb9085c01f UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb905753f1 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb90573246 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb90572c8f UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb9054d105 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb90891b85 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb9085a935 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb9085c01f UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb905753f1 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb90573246 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb90891b76 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb9085a935 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb9085c01f UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb905753f1 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb90573246 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb90891b76 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb9085a935 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb9085c01f UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb905753f1 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb90573246 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb90891b76 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb9085a935 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb9085c01f UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb905753f1 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb90573246 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb90891b76 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb9085a935 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb9085c01f UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb905753f1 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb90573246 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb90891b76 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb9085a935 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb90887ded UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb908590ce UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb90887ded UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb908590ce UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb90beca4f UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb90bf53ea UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb90bf9c0e UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb90bfb238 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb90c0bab7 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb90c1e343 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb90bfe103 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb9062e74f UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb9062e3dc UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb90b3e5b9 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb90b3d758 UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb90b3dd4e UnrealEditor-CoreUObject.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb6726167c UnrealEditor-UnrealEd.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb67261974 UnrealEditor-UnrealEd.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb67269f6a UnrealEditor-UnrealEd.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb6727b9a4 UnrealEditor-UnrealEd.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb6727b1ac UnrealEditor-UnrealEd.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb65ee9940 UnrealEditor-UnrealEd.dll!UnknownFunction
UATHelper: Packaging (Windows): LogOutputDevice: Error:
UATHelper: Packaging (Windows): LogOutputDevice: Error: end: stack for UAT
PackagingResults: Error: begin: stack for UAT
PackagingResults: Error: === Handled ensure: ===
PackagingResults: Error: Ensure condition failed: bCustomPropertyListForPostConstructionInitialized [File:D:\build++UE5\Sync\Engine\Source\Runtime\Engine\Private\BlueprintGeneratedClass.cpp] [Line: 1242]
PackagingResults: Error: Custom Property List Not Initialized for /Game/System/Combat/Damageable/BPC_DamageSystem.BPC_DamageSystem_C
PackagingResults: Error: Stack:
PackagingResults: Error: [Callstack] 0x00007ffb6b291434 UnrealEditor-Engine.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb68bfe164 UnrealEditor-Engine.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb90b39f3f UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb90b42536 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb90b16cf9 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb90b5809e UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb9085a46e UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb9085c01f UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb90572b23 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb9054d105 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb90891b85 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb9085a935 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb9085c01f UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb905753f1 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb90573246 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb90572c8f UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb9054d105 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb9055139d UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb905459dc UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb9085921e UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb9085ae4b UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb9056789d UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb9054d2cd UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb9054d0fd UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb90891b85 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb9085a935 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb9085c01f UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb905753f1 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb90573246 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb90572c8f UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb9054d105 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb90891b85 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb9085a935 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb9085c01f UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb905753f1 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb90573246 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb90891b76 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb9085a935 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb9085c01f UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb905753f1 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb90573246 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb90572c8f UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb9054d105 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb90891b85 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb9085a935 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb9085c01f UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb905753f1 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb90573246 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb90891b76 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb9085a935 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb9085c01f UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb905753f1 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb90573246 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb90891b76 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb9085a935 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb9085c01f UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb905753f1 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb90573246 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb90891b76 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb9085a935 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb9085c01f UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb905753f1 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb90573246 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb90891b76 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb9085a935 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb9085c01f UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb905753f1 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb90573246 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb90891b76 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb9085a935 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb90887ded UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb908590ce UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb90887ded UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb908590ce UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb90beca4f UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb90bf53ea UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb90bf9c0e UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb90bfb238 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb90c0bab7 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb90c1e343 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb90bfe103 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb9062e74f UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb9062e3dc UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb90b3e5b9 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb90b3d758 UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb90b3dd4e UnrealEditor-CoreUObject.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb6726167c UnrealEditor-UnrealEd.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb67261974 UnrealEditor-UnrealEd.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb67269f6a UnrealEditor-UnrealEd.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb6727b9a4 UnrealEditor-UnrealEd.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb6727b1ac UnrealEditor-UnrealEd.dll!UnknownFunction
PackagingResults: Error: [Callstack] 0x00007ffb65ee9940 UnrealEditor-UnrealEd.dll!UnknownFunction
PackagingResults: Error: end: stack for UAT

YellowJelloTD · July 7, 2025, 6:47am

deleting the bp component and remaking it from scratch was rough but it did fix my issue

MartenZander · July 15, 2025, 6:47pm

I am having the same issue. Any better solutions than recreating the component?

TadParty · July 17, 2025, 2:31pm

I also face this issue, in my case it’s in a PDA - I tried renaming and even re-creating it, but even the recreated asset fails in the same way. I’m wondering if the parent class might be the issue, but it’s hard to track down.

Any help would be greatly appreciated

TadParty · July 17, 2025, 4:19pm

So I found a little workaround that at least let’s me get further in the build process, just want to share it in case it helps someone:

I created a child class of the affected blueprint’s parent, then reparented the affected blueprint to this dummy parent. In my scenario that should work and the error doesn’t happen during build.

Leomez · July 18, 2025, 4:20pm

I found a solution!!!

At first, simply renaming or reparenting didn’t fix the error. The real solution came when I focused on removing as many direct references as possible from the blueprint.
Here’s what was happening:

MyComponent had a reference that kicked off a cooking process for another blueprint.
That blueprint had its own references, which eventually triggered cooking for MyComponent again. A circular reference.
This created a long dependency chain.

If this chain gets too long or messy, the cooking process can’t always resolve it in the correct order, and it fails. Probably because one of the assets wasn’t ready or “cooked” in time.

To fix it:

I removed some direct references in MyComponent.
I replaced them with blueprint interfaces.
I used the Reference Viewer to confirm the links were fully gone.

The error message in the editor includes this line:

if (GBlueprintNativePropertyInitFastPathDisabled
    || !ensureMsgf(bCustomPropertyListForPostConstructionInitialized, TEXT("Custom Property List Not Initialized for %s"), *GetPathNameSafe(this))) // Something went wrong, probably a race condition
{

So… is this truly a race condition? Or is it just bad blueprint dependency management that looks like a race?