Building Carla 5.5 on Windows 11

[BR8882002]

Got A pop up window with this image
The image shows a dialog box from the Unreal Engine, titled "Convert Project". It's informing the user that the project they are trying to open was created with a different version of the Unreal Engine.

Here's a breakdown of the message:

"This project was made with a different version of the Unreal Engine. Converting to this version will rebuild your code projects." This means the project's code needs to be adapted to the current Unreal Engine version.  
"New features and improvements sometimes cause API changes, which may require you to modify your code before it compiles. Content saved with newer versions of the editor will not open in older versions." This explains why the conversion is necessary: changes in the engine's code (API) might break the existing code, and content created in newer versions is not backward compatible.  
"We recommend you open a copy of your project to avoid damaging the original." This is a safety precaution to prevent accidental corruption of the original project during the conversion process.
The dialog box also presents four options:

Open a copy: Creates a duplicate of the project and opens the copy, leaving the original untouched. This is the recommended option.
Convert in-place: Converts the original project directly. This is riskier as it could potentially damage the original project.
Skip conversion: Opens the project without converting it. This might lead to errors or instability if the project is not compatible with the current version.
Cancel: Closes the dialog box and prevents the project from being opened.
In essence, the dialog is warning the user about potential compatibility issues and advising them to create a copy of the project before converting it to the current Unreal Engine version.

even though I built from source UE5.5 from https://github.com/EpicGames/UnrealEngine/releases/tag/5.5.4-release and the instructions I followed are literally Building CARLA in Windows with Unreal Engine 5.5 so why does it says the the project I cloned (the Carla simulator) was made in a different version ??? Both are 5.5 no?
I mean the it couldn't open the carla uproject when I choose open a copy 'cause it gave me that no Definitions.def found error so what shall I do?

[cheq2021]

Is your build progress all sucessfull? Follow these steps mybe helpfull: 1.copy Definitions.def/Includes.def/Libraries.def to the CarlaUnreal/Plugins/Carla directory. 2.continue build until no errors show.

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________________________________ 发件人: BR8882002 ***@***.***> 发送时间: 2025年3月18日 20:08 收件人: carla-simulator/carla ***@***.***> 抄送: Subscribed ***@***.***> 主题: [carla-simulator/carla] Building Carla 5.5 on Windows 11 (Discussion #8757) Got A pop up window with this image The image shows a dialog box from the Unreal Engine, titled "Convert Project". It's informing the user that the project they are trying to open was created with a different version of the Unreal Engine. Here's a breakdown of the message: "This project was made with a different version of the Unreal Engine. Converting to this version will rebuild your code projects." This means the project's code needs to be adapted to the current Unreal Engine version. "New features and improvements sometimes cause API changes, which may require you to modify your code before it compiles. Content saved with newer versions of the editor will not open in older versions." This explains why the conversion is necessary: changes in the engine's code (API) might break the existing code, and content created in newer versions is not backward compatible. "We recommend you open a copy of your project to avoid damaging the original." This is a safety precaution to prevent accidental corruption of the original project during the conversion process. The dialog box also presents four options: Open a copy: Creates a duplicate of the project and opens the copy, leaving the original untouched. This is the recommended option. Convert in-place: Converts the original project directly. This is riskier as it could potentially damage the original project. Skip conversion: Opens the project without converting it. This might lead to errors or instability if the project is not compatible with the current version. Cancel: Closes the dialog box and prevents the project from being opened. In essence, the dialog is warning the user about potential compatibility issues and advising them to create a copy of the project before converting it to the current Unreal Engine version. even though I built from source UE5.5 from https://github.com/EpicGames/UnrealEngine/releases/tag/5.5.4-release and the instructions I followed are literally Building CARLA in Windows with Unreal Engine 5.5 so why does it says the the project I cloned (the Carla simulator) was made in a different version ??? Both are 5.5 no? I mean the it couldn't open the carla uproject when I choose open a copy 'cause it gave me that no Definitions.def found error so what shall I do? ― Reply to this email directly, view it on GitHub<#8757>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/A2PCPJVUVQB7YHNEHCFNPQ32VAEFPAVCNFSM6AAAAABZH7BAXWVHI2DSMVQWIX3LMV43ERDJONRXK43TNFXW4OZYGA4TOOJUG4>. You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[BR8882002]

Well, first of all I understood that I didn't build the right Unreal version, I shouldn't have built from source https://github.com/EpicGames/UnrealEngine/releases/tag/5.5.4-release but this https://github.com/CarlaUnreal/UnrealEngine .
And now I managed to to launch the unreal editor since the new unreal build process have completed successfully but still gave the same Defentions.def error...

The steps I made
Unreal4Carla is where i cloned https://github.com/CarlaUnreal/UnrealEngine.git and then build the solution file (sln file) in VS22 on Developer Editor-win64 in the solution config ... it has been completed perfectly "========== Build: 12 succeeded, 0 failed, 0 up-to-date, 0 skipped =========="
I directed the path in CarlaUE5 project to C:\Unreal4Carla:
(carlaVenv) C:\CarlaUE5>echo %CARLA_UNREAL_ENGINE_PATH%
C:\Unreal4Carla
and ofc I work on a py venv 3.10 to support it:
(carlaVenv) C:\Users\roman\Desktop\CarlaUE5>python --version
Python 3.10.0
Clarification: the error I get is after I successfully launched the unreal editor from the built source of https://github.com/CarlaUnreal/UnrealEngine, when I try to browse and open the C:\Users\roman\Desktop\CarlaUE5\Unreal\CarlaUnreal\CarlaUnreal.uproject

[cheq2021]

also copy these files to CarlaExporter and CarlaTools folder if such error showed.

[cheq2021]

I tried the solution you made serverals days ago, but UE version it is not the key reasion. The key reason is the file that lost ,copy them manually .

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________________________________ 发件人: BR8882002 ***@***.***> 发送时间: 2025年3月19日 17:03 收件人: carla-simulator/carla ***@***.***> 抄送: cheq2021 ***@***.***>; Comment ***@***.***> 主题: Re: [carla-simulator/carla] Building Carla 5.5 on Windows 11 (Discussion #8757) I decided to remove my Carla project and to start over :) I re-run over the guide by following https://carla-ue5.readthedocs.io/en/latest/build_carla/ documentation . And when I tried to cmake -G Ninja -S . -B Build -DCMAKE_BUILD_TYPE=Release -DCMAKE_POLICY_VERSION_MINIMUM=3.5 it gives me this error -- Found Python3: C:/Program Files/WindowsApps/PythonSoftwareFoundation.Python.3.13_3.13.752.0_x64__qbz5n2kfra8p0/python3.13.exe (found version "3.13.2") found components: Interpreter Development.Module Development.Embed Development.SABIModule CMake Error at CMake/Util.cmake:24 (message): Missing CARLA content. Call Stack (most recent call first): Unreal/CMakeLists.txt:53 (carla_error)

-- Configuring incomplete, errors occurred! So I'm gonna try with this first ... ― Reply to this email directly, view it on GitHub<#8757 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/A2PCPJRSUC3N3T7SB7WLAY32VEXH3AVCNFSM6AAAAABZH7BAXWVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTENJUHA3TOOA>. You are receiving this because you commented.Message ID: ***@***.***>

[BR8882002]

Thank you so much for responding you have no idea how much I appreciate it !

Actually I tried to re-do the all process and I'm gonna explain the steps I took and the phase I'm stuck on:
Ok, those are the prerequisites I have to start the process:
(Everything is done in Open x64 Native Tools Command Prompt for VS 2022)
I've completed perfectly the build process of the own fork branch https://github.com/CarlaUnreal/UnrealEngine as Unreal4Carla (I managed to launch the editor from it)
I set CARLA_UNREAL_ENGINE_PATH to "C:\Unreal4Carla" (the path in which my carla ue located)
I set my Developer mode on

(I removed my old carla project in order to have a fresh start)
The CARLA build process itself:
I cloned the CARLA ue5 version by this command: git clone -b ue5-dev https://github.com/carla-simulator/carla.git CarlaUE5 has been cloned with seemingly no problems and then cd CarlaUE5
I created a py 3.10 version venv in order to support the process by this command: py -3.10 -m venv carlaVenv which I activated by C:\CarlaUE5>carlaVenv\Scripts\activate.bat
and checked:
(carlaVenv) C:\CarlaUE5>py --version
Python 3.10.0
🙂

CarlaSetup.bat:
(carlaVenv) C:\CarlaUE5>CarlaSetup.bat
Installing prerequisites...
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
100 4344k 100 4344k 0 0 3000k 0 0:00:01 0:00:01 --:--:-- 34.4M
Took much shorter time than I'd imagined assumingly because I've tried multiple times to run the documentation.

4. Then I tried to configure by: cmake -G Ninja -S . -B Build -DCMAKE_BUILD_TYPE=Release,
   but I got an error says that I should add -DCMAKE_POLICY_VERSION_MINIMUM=3.5
   So I did and I got this error: "-- Found Python3: C:/CarlaUE5/carlaVenv/Scripts/python.exe (found version "3.10.0") found components: Interpreter Development.Module Development.Embed Development.SABIModule
   CMake Error at CMake/Util.cmake:24 (message):
   Missing CARLA content.
   Call Stack (most recent call first):
   Unreal/CMakeLists.txt:53 (carla_error)"

This is the the stage in which I stuck unfortunately

[GreatBruceYoung]

Have you solved all problems? I also get stuck at the stage of cmake operation. It seems some files are missing.

[yakotaki]

Have you solved all problems? I also get stuck at the stage of cmake operation. It seems some files are missing.
try to change
set skip_prerequisites=true
in carlasetup.bat