The problem of the form "Error: [Callstack] your hexadecimal number UnrealEditor-CoreUObject.dll!UnknownFunction []"

Incognito0 · March 31, 2023, 2:16am

The problem of the form “Error: [Callstack] your hexadecimal number UnrealEditor-CoreUObject.dll!UnknownFunction []”

Hi! I ran into an inadequate problem, which I still solved, and now I want to share my experience. If I only had this knowledge earlier, I would have saved more than a week of real working time (I’m serious). So, this is The problem of the form “Error: [Callstack] your hexadecimal number UnrealEditor-Core Object.dll !UnknownFunction []”. This happens when you try to make cooking and, accordingly, package too.

LogOutputDevice: Error: === Handled ensure: ===
LogOutputDevice: Error: Ensure condition failed: !FindPin(FFunctionEntryHelper::GetWorldContextPinName())  [File:D:\build\++UE5\Sync\Engine\Source\Editor\BlueprintGraph\Private\K2Node_FunctionEntry.cpp] [Line: 404] 
LogOutputDevice: Error: Stack: 
LogOutputDevice: Error: [Callstack] 0x00007ffa08ff1c1a UnrealEditor-BlueprintGraph.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa08fd3dc9 UnrealEditor-BlueprintGraph.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa08fd5c6f UnrealEditor-BlueprintGraph.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa08f84617 UnrealEditor-BlueprintGraph.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa0c7a7588 UnrealEditor-UnrealEd.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa0b18a009 UnrealEditor-Kismet.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa0b187568 UnrealEditor-Kismet.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa10673e20 UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa1092a066 UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa1095241e UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa10928983 UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa1092a4bb UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa10953761 UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa10aed9eb UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa1091d48f UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa109881ac UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa10986681 UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa10988322 UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa10986681 UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa1092b3fe UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa109525d8 UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa1092800d UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa1095241e UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa10927baf UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa1095241e UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa10928983 UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa1092a4bb UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa10953761 UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa10aed9eb UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa1091d48f UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa109881ac UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa10986681 UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa10988322 UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa10986681 UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa10985f91 UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa10934d6a UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa1096b5e6 UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa109800c3 UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa1092c11a UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa1094dac3 UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa10aed6ea UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa1091d48f UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa109881ac UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa10986681 UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa10988322 UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa10986681 UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa10988322 UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa10986681 UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa10985f91 UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa10934d6a UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa1096b5e6 UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa109800c3 UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa1092c11a UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa1094dac3 UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa10aed6ea UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa1091d48f UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa109881ac UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa10986681 UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa10988322 UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa10986681 UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa10985f91 UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa10934d6a UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa1096b5e6 UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa109800c3 UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa1092c11a UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa1094dac3 UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa10aed6ea UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa10aec3c4 UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa10aec930 UnrealEditor-CoreUObject.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff9e013a6fe UnrealEditor-ContentBrowserAssetDataSource.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff9e01266a6 UnrealEditor-ContentBrowserAssetDataSource.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff9e0126a58 UnrealEditor-ContentBrowserAssetDataSource.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff9e010e3ba UnrealEditor-ContentBrowserAssetDataSource.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff9fe526fdc UnrealEditor-ContentBrowser.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff9fe4bfcac UnrealEditor-ContentBrowser.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff9fe5296d8 UnrealEditor-ContentBrowser.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff9fe4cf066 UnrealEditor-ContentBrowser.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff9fe425f92 UnrealEditor-ContentBrowser.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff9fe53fd7d UnrealEditor-ContentBrowser.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff9fe52a18d UnrealEditor-ContentBrowser.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa0ffbef35 UnrealEditor-Slate.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa10024c42 UnrealEditor-Slate.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa10014372 UnrealEditor-Slate.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa1000a788 UnrealEditor-Slate.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa57f01967 UnrealEditor-ApplicationCore.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa57ee67d1 UnrealEditor-ApplicationCore.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa57f04391 UnrealEditor-ApplicationCore.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa57edff93 UnrealEditor-ApplicationCore.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa72c91cec USER32.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa72c9193e USER32.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff9dc1d03b3 InkObj.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa424810f2 atlthunk.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa72c91cec USER32.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa72c90f46 USER32.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ffa57f05849 UnrealEditor-ApplicationCore.dll!UnknownFunction []

and

UATHelper: Cooking (Windows): LogInit: Display: Warning/Error Summary (Unique only)
UATHelper: Cooking (Windows): LogInit: Display: -----------------------------------
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: !FindPin(FFunctionEntryHelper::GetWorldContextPinName())  [File:D:\build\++UE5\Sync\Engine\Source\Editor\BlueprintGraph\Private\K2Node_FunctionEntry.cpp] [Line: 404]
UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: Stack:
UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffa08ff1c1a UnrealEditor-BlueprintGraph.dll!UnknownFunction []
UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffa08fd3dc9 UnrealEditor-BlueprintGraph.dll!UnknownFunction []
UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffa08fd5c6f UnrealEditor-BlueprintGraph.dll!UnknownFunction []
UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffa08f84617 UnrealEditor-BlueprintGraph.dll!UnknownFunction []
UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffa0c7a7588 UnrealEditor-UnrealEd.dll!UnknownFunction []
UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffa0b18a009 UnrealEditor-Kismet.dll!UnknownFunction []
UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffa0b187568 UnrealEditor-Kismet.dll!UnknownFunction []
UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffa10673e20 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffa1092a066 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffa1092a4bb UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffa10953761 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffa10aed9eb UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffa10aec3c4 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffa10aec930 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffa0c1457d2 UnrealEditor-UnrealEd.dll!UnknownFunction []
UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffa0c145a02 UnrealEditor-UnrealEd.dll!UnknownFunction []
UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffa0c14f810 UnrealEditor-UnrealEd.dll!UnknownFunction []
UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffa0c161870 UnrealEditor-UnrealEd.dll!UnknownFunction []
UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffa0c1611a5 UnrealEditor-UnrealEd.dll!UnknownFunction []
UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffa0bebf780 UnrealEditor-UnrealEd.dll!UnknownFunction []
UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffa0bee16a3 UnrealEditor-UnrealEd.dll!UnknownFunction []
UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ff6eed2b0ce UnrealEditor-Cmd.exe!UnknownFunction []
UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ff6eed22688 UnrealEditor-Cmd.exe!UnknownFunction []
UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ff6eed2296a UnrealEditor-Cmd.exe!UnknownFunction []
UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ff6eed25680 UnrealEditor-Cmd.exe!UnknownFunction []
UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ff6eed371b4 UnrealEditor-Cmd.exe!UnknownFunction []
UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ff6eed396f2 UnrealEditor-Cmd.exe!UnknownFunction []
UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffa72bd55a0 KERNEL32.DLL!UnknownFunction []
UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: [Callstack] 0x00007ffa7430485b ntdll.dll!UnknownFunction []
UATHelper: Cooking (Windows): LogInit: Display: LogOutputDevice: Error: end: stack for UAT

So, to fix this, you need:

make a backup (copy) of the project (it is important)
delete everything except the blueprints
check if the cooking is working now (obviously not)
delete all blueprints like function library - that was exactly my problem
try to cook - if everything is OK, then you have the same problem as me, if not, then this method is not for you
return to the state before step 4, but do not delete the function libraries
by trials and errors, find any one bluprint of the function library type that does not allow you to cook a project (no matter how many of them cause an error, one must remain after deleting the rest)
open this library and find a function (or functions!) in it that has the input parameter “World Context” - aka “__World Context”.
Delete this input parameter
Try to cook and hope

bugfix752×152 16.1 KB

If it worked, then delete this “experimental project” and go back to the original copy. There you need to find all the same functions with an error.

Recommendations:

make a backup after deleting all assets except blueprints - this will save time
use the cooking option, not the packaging
do not use Debug Game binary configuration - this will slow down the process (use Development)

bugfix2863×486 31.2 KB
try to remember if you copied the functions in any library - in this case this TERRIBLE error appears
double-check the problematic bluprint for additional errors (for example, there are other functions with such a problem)

Try to remove the “extra” folders from the project (I mean those that are restored themselves).
Also look for other solutions on this forum that may help you (they didn’t help me): checking all blueprints for compilation impossibility, imperceptibly-corrupted variables (perhaps use the free third-party plugin for this “RefreshAllNodes” - useful, by the way).

I hope this method helps, good luck!
Thanks.

nande · March 31, 2023, 2:23am

was deleting intermediate and binaries (and maybe saved) and then regenerating the project not enough?

Incognito0 · March 31, 2023, 2:26am

I’ve tried a lot of things and your advice too. Everyone has their own problem. Mine was decided like this. Who has not faced this horror will not understand… I hope you have not encountered.

nande · March 31, 2023, 2:28am

oh ive been through my own stuff too, don’t worry. (imho) is not about not going through shtuff, is about coming out the other way.
i was just curious whether you tried that or not.
i’m glad you found your solution and thanks for sharing it.

shm0 · April 4, 2023, 7:49pm

Someone came up with a much more reasonable way to solve this here: Error when packaging - #20 by Fury22PL

Incognito0 · April 12, 2023, 1:40pm

This method is not “more reasonable”. It requires the use of C++ instead of blueprints, it requires the use of a debugger (this is time, space on the PC, extra knowledge, extra hassle, etc.). Moreover, the cause of the problem is not specified. This is not a solution at all, but a generalized case of correction that I have seen in many topics before. If you search, there are many exactly the same solutions on the Internet. But the main reason for dissatisfaction with this answer is its low and extremely vague wording. To summarize, this is not a solution to a specific problem or its causes, it is a single fix with a debugger.

PresumptivePanda · May 11, 2023, 11:37pm

Hi there @Incognito0, hope you’re well!

This topic has been moved from International to Programming & Scripting: Blueprint.

When posting, please review the categories to ensure your topic is posted in the most relevant space.

Thanks and happy developing!

shm0 · November 30, 2023, 2:37am

This is the solution I was referring to. It does not require C++ or coding. I was able to fix all these errors pretty quickly doing this.

----- pasting the solution from the other thread below -----

I managed to solve this problem in a very simple way that doesn’t require much technical knowledge, and it only takes a few minutes!

Steps:

Install and open Notepad++.
Click Search → Find in Files….
Search for “NoneNone” (without quotation marks). Make sure that “In all sub-folders” is ticked. Choose your Content directory as directory, and/or the folder where your Blueprints are placed.
The search procedure should find at least one Blueprint (.uasset) file with a match. Remove all object variables (including e.g., actor references, arrays, maps) in the corresponding Blueprint(s) WITHIN the editor (do not try to change the binary file, it will break things), and replace the variables with fresh ones (they can be of the exact same type). Save your Blueprint.
Try packaging/building/cooking again. The problem should have been solved. If the problem still persists, try doing the same for all local variables in the matching Blueprint’s different functions.

The problem of the form "Error: [Callstack] *your hexadecimal number* UnrealEditor-CoreUObject.dll!UnknownFunction []"

The problem of the form "Error: [Callstack] your hexadecimal number UnrealEditor-CoreUObject.dll!UnknownFunction []"