Updating from 5.5 to 5.6/7 causes a cooking issue with Blueprint_Interaction_Device_C

Development Platform & Builds
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1

Hi all,

We have a problem that is preventing us from cooking a build and therefore updating our demo.

Since we migrated to 5.5, on trying to cook content, we are greeted with the following error:

UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: begin: stack for UAT
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: === Handled ensure: ===
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error:
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: Ensure condition failed: bCustomPropertyListForPostConstructionInitialized  [File:D:\build\++UE5\Sync\Engine\Source\Runtime\Engine\Private\BlueprintGeneratedClass.cpp] [Line: 1256]
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: Custom Property List Not Initialized for /Game/Blueprints/BP_Interaction_Device.BP_Interaction_Device_C
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: Stack:
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb29c168a9 UnrealEditor-Engine.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb279f4f83 UnrealEditor-Engine.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e370eff UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e37ab8d UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e349ca6 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e38f7f6 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e12f6c2 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e130c68 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2dea4195 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2de7b758 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e15526e UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e12fae8 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e130c68 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2dea5c75 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2dea492c UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2dea42ff UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2de7b758 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2de7b750 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2de7b750 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e15526e UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e12fae8 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e130c68 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2dea4195 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2de7b758 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2de7b750 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e15526e UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e12fae8 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e130c68 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e14fa94 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e12de57 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e130c68 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2dea4195 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2de7b758 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2de7b750 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2de7b750 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e15526e UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e12fae8 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e130c68 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2dea4195 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2de7b758 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2de7b750 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2de7b750 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e15526e UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e12fae8 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e130c68 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2dea4195 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2de7b758 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2de7b750 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e15526e UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e12fae8 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e130c68 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e14fa94 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e12de57 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e130c68 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2dea4195 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2de7b758 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2de7b750 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2de7b750 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e15526e UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e12fae8 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e130c68 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2dea4195 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2de7b758 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2de7b750 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e15526e UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e12fae8 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e130c68 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e14fa94 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e12de57 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e130c68 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2dea4195 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2de7b758 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2de7b750 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e15526e UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e12fae8 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e130c68 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2dea4195 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2de7b758 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2de7b750 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2de7b750 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e15526e UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e12fae8 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e130c68 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2dea4195 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2de7b758 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2de7b750 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e15526e UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e12fae8 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2e130c68 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2dea4195 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2de7b758 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: [Callstack] 0x00007ffb2de7b750 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error:
UATHelper: Error: Cooking (Windows): LogOutputDevice: Error: end: stack for UAT

Please note: We don’t even have a BP_Interaction_Device.BP_Interaction_Device_C, just BP_Interaction_Device.BP_Interaction_Device. We’re not sure were the C is coming from.

We’ve noticed others have reported the same issue, and various fixes have been proposed, none of which worked for us. For reference, we have tried the following:

  1. Recompiling the blueprint (no errors flagged)

  2. Clearing the project cache.

  3. Fixing redirectors.

  4. Changing engine version from 5.6 to 5.7.

  5. Someone suggested commenting out a line (FLinkerLoad::DeferExportCreation in BlueprintSupport.cpp) so the assert no longer fires, as suggested in this thread. This also did not work.

We haven’t tried deleting or redoing the blueprint (as its used extensively in our project), and others have reported doing the same and still encountering the issue.

I have uploaded a text file with the blueprint in question if anyone wants to take a look and investigate.

At this point, we are actively blocked from creating a new build (for demos, etc) until the issue is resolved. Does anyone know what could be the problem here, and what we can do to fix it?

Any help would be greatly appreciated!

BP_Interaction_Device.txt (297.5 KB)

2

Never a fan of bumping things, but I’ve observed the more or less unofficial 4 day rule.

Does anyone know why this might be happening?

3

For anyone else having this issue in the future, here is how I solved it:

I tried migrating the broken blueprint to a new project (and any dependent blueprints) but that also failed the cook with the same error.

However, rebuilding the blueprint from scratch (just creating it again in a new project, same calls, functions, variables, event dispatchers, etc) and making small tweaks to any affected blueprints (refreshing nodes, etc) lead to a successful cook.

This is one solution. I was about to do the same in the original project, but I decided instead to duplicate the blueprint first. I then tried to delete the original one. It had 198 references, and I redirected it to the duplicate, and proceeded.

In most cases, it said some consolidations couldn’t be done, and told me you can try an editor command to ensure affected packages aren’t loaded at start. I ignored this, initially.

The original blueprint always remained, even after I had selected it to be deleted,=.

I noticed that, if you repeated this step each time, the list of affected blueprints would diminish. I did this about 4-5 times until there were only 4-5 blueprints affected.

With the remaining ones, it was just a case of refreshing some nodes, or if that didn’t work, simply recreating them and compiling, and then it worked.

Then I finally force deleted the old blueprint, knowing there were no longer any pending references.

So to summarise:

  1. Duplicate the blueprint.

  2. Delete the old one.

  3. Redirect it to the dupe (it will fail a lot)

  4. Repeat Step 3. The list of dependencies should shorten.

  5. When you keep hitting the same dependencies, manually edit those and refresh node/rebuild the affected calls.

  6. Force delete the old blueprint.

I hope this helps out anyone else that hits this issue.