Building on Windows 0.9.X

[iFuSiiOnzZ]

These instructions are outdated, please follow How to build CARLA on Windows.

---

New automated instructions

Make sure you have:

Unreal Engine 4.19
Visual Studio 2017 (as default version, if not set it)

Windows SDK 10 (should be installed with VS2017)
Windows SDK 8.1 (select it when you install VS2017 or after)

make
cmake
python 3 (x64)

For more information about how to set up the Visual Studio 2017 and all it's components in order to build a project have a look at Unreal Engine Visual Studio setup

Compilation errors (C2440 or C2672)

If you also have installed other version of Visual Studio or Microsoft Compiler and get any error during the build as C2440 or C2672 this is probably because is not using the 2017 compiler, so try first to uninstall the other ones and rebuild again.

If you would like to keep the other version of Visual Studio edit %appdata%\Unreal Engine\UnrealBuildTool\BuildConfiguration.xml and <path_to_unreal_engine_installation>\UE_4.19\Engine\Saved\UnrealBuildTool\BuildConfiguration.xml adding the following lines under Configuration tag:

<VCProjectFileGenerator>
    <Version>VisualStudio2017</Version>
</VCProjectFileGenerator>

<WindowsPlatform>
    <Compiler>VisualStudio2017</Compiler>
</WindowsPlatform>

Unreal Engine 4.19 not detected

No information has been written in the Windows registry, try to reinstall Unreal or take a look at the next post.

Carla instructions example:

1) git clone https://github.com/carla-simulator/carla.git

2) Download https://drive.google.com/uc?id=1FtC00CrDb7Kz5StBAwb6vqOGbzZtpROx&export=download
3) Extract in Unreal/CarlaUE4/Content/Carla

4) make launch

Before posting in this issue:

• Search for similar comments (just a quick ctrl+F search).
• Make sure you use the correct Unreal Engine version.

If your questions satisfy the previous points, we will be glad to answer them. :grimacing:

Discord

Consider join our discord channel for a further talk. We have a Windows specific channel.

---

Manual build

Follow the instructions from 1 to 4, at this point, double-clicking on Unreal/CarlaUE4/CarlaUE4.uproject should work. A warning about Carla plugin being not compatible appears sometimes, it’s an Unreal’s bug and can be ignored, press no to disable Carla plugin. Then press yes when asked to compile the missing modules.

If that doesn’t work, you can open the project with Visual Studio. Right click the CarlaUE4.uproject and select Generate Visual Studio Project Files. Then open the Visual Studio solution it generates (*.sln). Hopefully this will give some hints on what fails.

---

PS: If you are coming from an open issue related with the build please make reference to it

[grafandreas]

Is it Windows 10 SDK? I just tried on a PC after new installation of VC 2017 and Unreal 4.19 and the Unreal log says:

Reflection code generated for CarlaUE4Editor in 13,6607113 seconds @progress pop ERROR: Windows SDK v8.1 must be installed in order to build this target.

[iFuSiiOnzZ]

Hi @grafandreas

I took a look at the Visual Studio setup for the Unreal Engine, and yes, it seems they ask for SDK 8.1. You can install it using the Visual Studio Installer, press Modify, under the tab Individual componentes search for SDKs, libraries and framework and check the Windows 8.1 SDK, for last press Modify.

[BrianN92]

I also failed to compile it. The errors are listed below:

Severity Code Description Project File Line Suppression State Error C2440 'initializing': cannot convert from 'initializer list' to 'FActorAttribute' CarlaUE4 D:\carla\Unreal\CarlaUE4\Plugins\Carla\Source\Carla\Actor\ActorBlueprintFunctionLibrary.cpp 252

Severity Code Description Project File Line Suppression State Error C2672 'TArray<FActorAttribute,FDefaultAllocator>::Emplace': no matching overloaded function found CarlaUE4 D:\carla\Unreal\CarlaUE4\Plugins\Carla\Source\Carla\Actor\ActorBlueprintFunctionLibrary.cpp 252

Severity Code Description Project File Line Suppression State Error UBT ERROR: Failed to produce item: D:\carla\Unreal\CarlaUE4\Plugins\Carla\Intermediate\Build\Win64\UE4Editor\DebugGame\UE4Editor-Carla-Win64-DebugGame.lib CarlaUE4 D:\carla\Unreal\CarlaUE4\Intermediate\ProjectFiles\UnrealBuildTool 1

Severity Code Description Project File Line Suppression State Error MSB3075 The command "D:\Epic\UE_4.19\Engine\Build\BatchFiles\Build.bat CarlaUE4Editor Win64 DebugGame "D:\carla\Unreal\CarlaUE4\CarlaUE4.uproject" -WaitMutex -FromMsBuild" exited with code 5. Please verify that you have sufficient rights to run this command. CarlaUE4 C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\V140\Microsoft.MakeFile.Targets 41

[jmarrr]

It also failed on my machine

1>------ Build started: Project: UE4, Configuration: BuiltWithUnrealBuildTool Win32 ------ 2>------ Build started: Project: CarlaUE4, Configuration: Development_Editor x64 ------ 2>Creating makefile for CarlaUE4Editor (no existing makefile) 2>Performing full C++ include scan (no include cache file) 2>UnrealBuildTool : error : Unable to instantiate module 'Carla': System.IO.DirectoryNotFoundException: Could not find a part of the path 'C:\Users\alanh\OneDrive\Desktop\carla\Unreal\CarlaUE4\Plugins\Carla\CarlaDependencies\lib'. 2> at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath) 2> at System.IO.FileSystemEnumerableIterator1.CommonInit() 2> at System.IO.FileSystemEnumerableIterator1..ctor(String path, String originalUserPath, String searchPattern, SearchOption searchOption, SearchResultHandler`1 resultHandler, Boolean checkHost) 2> at System.IO.Directory.GetFiles(String path, String searchPattern) 2> at Carla.AddBoostLibs(String LibPath) in c:\Users\alanh\OneDrive\Desktop\carla\Unreal\CarlaUE4\Plugins\Carla\Source\Carla\Carla.Build.cs:line 82 2> at Carla.AddCarlaServerDependency(ReadOnlyTargetRules Target) in c:\Users\alanh\OneDrive\Desktop\carla\Unreal\CarlaUE4\Plugins\Carla\Source\Carla\Carla.Build.cs:line 106 2> (referenced via CarlaUE4.uproject -> Carla.uplugin) 2>C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\Common7\IDE\VC\VCTargets\Microsoft.MakeFile.Targets(44,5): error MSB3075: The command ""C:\Program Files\Epic Games\UE_4.19\Engine\Build\BatchFiles\Build.bat" CarlaUE4Editor Win64 Development "C:\Users\alanh\OneDrive\Desktop\carla\Unreal\CarlaUE4\CarlaUE4.uproject" -WaitMutex -FromMsBuild" exited with code 5. Please verify that you have sufficient rights to run this command. 2>Done building project "CarlaUE4.vcxproj" -- FAILED. ========== Build: 1 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

I tried to run cmd as administrator still not working

[grafandreas]

@BrianN92 I experienced this too and it went away after installing VC 2017 and everything on a PC without a previous VC installation. Note that, if you have more than one VC installation on your PC, maybe an older version is being used during build (IIRC, the build files ask for VC 2015 as minimum, but that is not sufficient).

[iFuSiiOnzZ]

If during the compilation you are getting an error like initializing': cannot convert from 'initializer list' to 'FActorAttribute please update Visual Studio to the latest version as the compiler of your current version of VS2017 doesn't support that kind of initialization.

@BrianN92 sorry for the delay, we have been in vacations. Above the line you have hte reason why is failing the compilation.

[iFuSiiOnzZ]

@overlapjho Have you manage to fix it? It seems like is missing all the dependencies. Sorry for the delay in response, we have been in vacations.

[jmarrr]

@iFuSiiOnzZ not yet, I've tried several solutions from other issues did not work

[iFuSiiOnzZ]

@overlapjho take a look if under Unreal\CarlaUE4\Plugins\Carla\CarlaDependencies you have the next folder structure:

includes
    - boost
    - carla
    - compiler
    - rpc

lib
    - carla_server.lib
    - carla_server_debug.lib
    - libboost_date_time-vc141-mt-x64-1_68.lib
    - libboost_system-vc141-mt-x64-1_68.lib
    - rpc.lib

[jmarrr]

@iFuSiiOnzZ yes I have those, this is my recent error product when i try to build it earlier

1>------ Rebuild All started: Project: UE4, Configuration: BuiltWithUnrealBuildTool Win32 ------ 2>------ Rebuild All started: Project: CarlaUE4, Configuration: Development_Editor x64 ------ 2>C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\Common7\IDE\VC\VCTargets\Microsoft.Cpp.props(31,3): warning MSB4011: "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\Common7\IDE\VC\VCTargets\Microsoft.Makefile.props" cannot be imported again. It was already imported at "C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\V140\Microsoft.cpp.props (31,3)". This is most likely a build authoring error. This subsequent import will be ignored. [C:\carla\Unreal\CarlaUE4\Intermediate\ProjectFiles\CarlaUE4.vcxproj] 1>C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\Common7\IDE\VC\VCTargets\Microsoft.Cpp.props(31,3): warning MSB4011: "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\Common7\IDE\VC\VCTargets\Microsoft.Makefile.props" cannot be imported again. It was already imported at "C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\V140\Microsoft.cpp.props (31,3)". This is most likely a build authoring error. This subsequent import will be ignored. [C:\carla\Unreal\CarlaUE4\Intermediate\ProjectFiles\CarlaUE4.vcxproj] 2>C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\Common7\IDE\VC\VCTargets\Microsoft.Cpp.props(31,3): warning MSB4011: "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\Common7\IDE\VC\VCTargets\Microsoft.Makefile.props" cannot be imported again. It was already imported at "C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\V140\Microsoft.cpp.props (31,3)". This is most likely a build authoring error. This subsequent import will be ignored. [C:\carla\Unreal\CarlaUE4\Intermediate\ProjectFiles\UE4.vcxproj] 1>C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\Common7\IDE\VC\VCTargets\Microsoft.Cpp.props(31,3): warning MSB4011: "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\Common7\IDE\VC\VCTargets\Microsoft.Makefile.props" cannot be imported again. It was already imported at "C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\V140\Microsoft.cpp.props (31,3)". This is most likely a build authoring error. This subsequent import will be ignored. [C:\carla\Unreal\CarlaUE4\Intermediate\ProjectFiles\UE4.vcxproj] 2>Cleaning CarlaUE4Editor Binaries... 2>Creating makefile for CarlaUE4Editor (no existing makefile) 2>Performing full C++ include scan (no include cache file) 2>Parsing headers for CarlaUE4Editor 2> Running UnrealHeaderTool "C:\carla\Unreal\CarlaUE4\CarlaUE4.uproject" "C:\carla\Unreal\CarlaUE4\Intermediate\Build\Win64\CarlaUE4Editor\Development\CarlaUE4Editor.uhtmanifest" -LogCmds="loginit warning, logexit warning, logdatabase error" -Unattended -WarningsAsErrors -installed 2>Reflection code generated for CarlaUE4Editor in 53.2410485 seconds 2>Performing 17 actions (2 in parallel) 2>PCH.CarlaUE4.cpp 2>SharedPCH.Engine.cpp 2>[3/17] Resource ModuleVersionResource.rc.inl 2>Module.Carla.cpp 2>C:\carla\Unreal\CarlaUE4\Plugins\Carla\Source\Carla\Actor\ActorBlueprintFunctionLibrary.cpp(252): error C2440: 'initializing': cannot convert from 'initializer list' to 'FActorAttribute' 2>C:\carla\Unreal\CarlaUE4\Plugins\Carla\Source\Carla\Actor\ActorBlueprintFunctionLibrary.cpp(252): note: No constructor could take the source type, or constructor overload resolution was ambiguous 2>C:\carla\Unreal\CarlaUE4\Plugins\Carla\Source\Carla\Actor\ActorBlueprintFunctionLibrary.cpp(252): error C2672: 'TArray<FActorAttribute,FDefaultAllocator>::Emplace': no matching overloaded function found 2>C:\carla\Unreal\CarlaUE4\Plugins\Carla\CarlaDependencies\include\rpc/msgpack/predef/other/endian.h(151): warning C4668: 'MSGPACK_ARCH_AMD64' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif' 2>C:\Program Files (x86)\Windows Kits\8.1\include\um\winnt.h(17005): warning C4668: '_APISET_RTLSUPPORT_VER' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif' 2>C:\Program Files (x86)\Windows Kits\8.1\include\um\interlockedapi.h(73): warning C4668: '_APISET_INTERLOCKED_VER' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif' 2>C:\Program Files (x86)\Windows Kits\8.1\include\um\processthreadsapi.h(1170): warning C4668: '_WIN32_WINNT_WINTHRESHOLD' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif' 2>C:\Program Files (x86)\Windows Kits\8.1\include\um\securitybaseapi.h(357): warning C4668: '_APISET_SECURITYBASE_VER' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif' 2>C:\Program Files (x86)\Windows Kits\8.1\include\um\securitybaseapi.h(472): warning C4668: '_APISET_SECURITYBASE_VER' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif' 2>C:\Program Files (x86)\Windows Kits\8.1\include\um\securitybaseapi.h(1302): warning C4668: '_APISET_SECURITYBASE_VER' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif' 2>C:\Program Files (x86)\Windows Kits\8.1\include\um\winbase.h(8618): warning C4668: 'NTDDI_WIN7SP1' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif' 2>C:\carla\Unreal\CarlaUE4\Plugins\Carla\CarlaDependencies\include\rpc/msgpack/v1/adaptor/array_ref.hpp(262): warning C4668: 'GNUC' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif' 2>C:\carla\Unreal\CarlaUE4\Plugins\Carla\CarlaDependencies\include\rpc/msgpack/v1/adaptor/array_ref.hpp(267): warning C4668: 'GNUC' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif' 2>C:\carla\Unreal\CarlaUE4\Plugins\Carla\CarlaDependencies\include\rpc/msgpack/v1/adaptor/map.hpp(204): warning C4668: 'GNUC' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif' 2>C:\carla\Unreal\CarlaUE4\Plugins\Carla\CarlaDependencies\include\rpc/msgpack/v1/adaptor/map.hpp(210): warning C4668: 'GNUC' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif' 2>C:\carla\Unreal\CarlaUE4\Plugins\Carla\CarlaDependencies\include\rpc/msgpack/v1/adaptor/vector.hpp(98): warning C4668: 'GNUC' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif' 2>C:\carla\Unreal\CarlaUE4\Plugins\Carla\CarlaDependencies\include\rpc/msgpack/v1/adaptor/vector.hpp(103): warning C4668: 'GNUC' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif' 2>C:\carla\Unreal\CarlaUE4\Plugins\Carla\CarlaDependencies\include\rpc/msgpack/v1/adaptor/vector_char.hpp(35): warning C4668: 'GNUC' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif' 2>C:\carla\Unreal\CarlaUE4\Plugins\Carla\CarlaDependencies\include\rpc/msgpack/v1/adaptor/vector_char.hpp(40): warning C4668: 'GNUC' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif' 2>C:\carla\Unreal\CarlaUE4\Plugins\Carla\CarlaDependencies\include\rpc/msgpack/v1/adaptor/vector_char.hpp(48): warning C4668: 'GNUC' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif' 2>C:\carla\Unreal\CarlaUE4\Plugins\Carla\CarlaDependencies\include\rpc/msgpack/v1/adaptor/vector_char.hpp(53): warning C4668: 'GNUC' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif' 2>C:\carla\Unreal\CarlaUE4\Plugins\Carla\CarlaDependencies\include\rpc/msgpack/v1/adaptor/vector_unsigned_char.hpp(35): warning C4668: 'GNUC' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif' 2>C:\carla\Unreal\CarlaUE4\Plugins\Carla\CarlaDependencies\include\rpc/msgpack/v1/adaptor/vector_unsigned_char.hpp(40): warning C4668: 'GNUC' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif' 2>C:\carla\Unreal\CarlaUE4\Plugins\Carla\CarlaDependencies\include\rpc/msgpack/v1/adaptor/vector_unsigned_char.hpp(48): warning C4668: 'GNUC' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif' 2>C:\carla\Unreal\CarlaUE4\Plugins\Carla\CarlaDependencies\include\rpc/msgpack/v1/adaptor/vector_unsigned_char.hpp(53): warning C4668: 'GNUC' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif' 2>C:\carla\Unreal\CarlaUE4\Plugins\Carla\CarlaDependencies\include\boost/throw_exception.hpp(3): warning C4668: 'GNUC' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif' 2>C:\carla\Unreal\CarlaUE4\Plugins\Carla\CarlaDependencies\include\boost/throw_exception.hpp(3): warning C4668: 'GNUC_MINOR__' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif' 2>C:\carla\Unreal\CarlaUE4\Plugins\Carla\CarlaDependencies\include\boost/predef/other/endian.h(151): warning C4668: 'BOOST_ARCH_AMD64' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif' 2>C:\Program Files (x86)\Windows Kits\8.1\include\shared\ntverp.h(121): warning C4668: 'DBG' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif' 2>C:\Program Files (x86)\Windows Kits\8.1\include\shared\ntverp.h(128): warning C4668: 'BETA' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif' 2>C:\Program Files (x86)\Windows Kits\8.1\include\shared\ntverp.h(134): warning C4668: 'OFFICIAL_BUILD' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif' 2>C:\carla\Unreal\CarlaUE4\Plugins\Carla\CarlaDependencies\include\boost/smart_ptr/shared_ptr.hpp(833): warning C4668: 'GNUC__' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif' 2>C:\carla\Unreal\CarlaUE4\Plugins\Carla\CarlaDependencies\include\boost/asio/detail/impl/win_iocp_socket_service_base.ipp(253): warning C4191: 'type cast': unsafe conversion from 'FARPROC' to 'cancel_io_ex_t' 2> Calling this function through the result pointer may cause your program to fail 2>Module.Carla.gen.cpp 2>[6/17] Resource PCLaunch.rc 2>CarlaUE4GameModeBase.gen.cpp 2>CarlaUE4.init.gen.cpp 2>CarlaMapGenerator.gen.cpp 2>CarlaUE4GameModeBase.cpp 2>CarlaMapGenerator.cpp 2>CarlaUE4.cpp 2>[13/17] Resource PCLaunch.rc 2>[14/17] Link UE4Editor-CarlaUE4.lib 2> Creating library C:\carla\Unreal\CarlaUE4\Intermediate\Build\Win64\UE4Editor\Development\UE4Editor-CarlaUE4.lib and object C:\carla\Unreal\CarlaUE4\Intermediate\Build\Win64\UE4Editor\Development\UE4Editor-CarlaUE4.exp 2>UnrealBuildTool : error : UBT ERROR: Failed to produce item: C:\carla\Unreal\CarlaUE4\Plugins\Carla\Intermediate\Build\Win64\UE4Editor\Development\UE4Editor-Carla.lib 2>Total build time: 567.10 seconds (Local executor: 0.00 seconds) 2>C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\V140\Microsoft.MakeFile.Targets(46,5): error MSB3073: The command "D:\UE_4.19\Engine\Build\BatchFiles\Rebuild.bat CarlaUE4Editor Win64 Development "C:\carla\Unreal\CarlaUE4\CarlaUE4.uproject" -WaitMutex -FromMsBuild" exited with code -1. 2>Done building project "CarlaUE4.vcxproj" -- FAILED. ========== Rebuild All: 1 succeeded, 1 failed, 0 skipped ==========

[iFuSiiOnzZ]

@overlapjho As compilation errors I am seeing error C2440 and error C2672, all the others are warnings. ~Make sure you have the latest version of VS2017 (as the current version of VS2017 that you have the compiler doesn't support those features).~

After performing more tests I found that if you have VC++ 2015.3 v14.00 (v140) toolset for desktop, Unreal Engine get the 2015 compiler instead if 2017 and causes the C2440 and C2672 errors.

Can you also specify wich version do you have? On Visual Studio go to Help -> About Microsoft Visual Studio, mine is 15.7.6

[jmarrr]

Same

[iFuSiiOnzZ]

@overlapjho Do you have any other versión of Visual Studio intalled? If you have it can you uninstall it? It should give a few warning but any error, strange.

PS: Can you join discord to make the conversation more fluent?

[iFuSiiOnzZ]

If you also have installed other version of Visual Studio or Microsoft Compiler and get any error during the build as C2440 or C2672 this is probably because is not using the 2017 compiler, so try first to uninstall the other ones and rebuild again.

If you would like to keep the other version of Visual Studio edit %appdata%\Unreal Engine\UnrealBuildTool\BuildConfiguration.xml adding the following lines:

<VCProjectFileGenerator>
    <Version>VisualStudio2017</Version>
</VCProjectFileGenerator>

<WindowsPlatform>
    <Compiler>VisualStudio2017</Compiler>
</WindowsPlatform>

[M-Hammod]

Hi,

I've successfully built carla using the instruction above (windows) , also I was able to get hit play or run CarlaUE4.exe stand alone. but when I ran carla\PythonClient\manual_control unreal crashes and I get the following error

[iFuSiiOnzZ]

Hi @M-Hammod

We tried to reproduce the error but we could not, can you try to compile and execute Carla from Visual Studio and when it crashes try to provide more information about the crash (call stack of Carla, etc). It seems like the some exception generated from the rpclib it wasn't captured.

[M-Hammod]

Hi @iFuSiiOnzZ, it seems that there is a difference between the manual_control.py under PythonAPI and PythonClient, this problem went away when I used PythonAPI code, also I have to run setup.py build & install. Thanks.

[iFuSiiOnzZ]

Thank you for the feedback @M-Hammod, PythonAPI is for Carla >= 0.9 and PythonClient for Carla < 0.9. In the future when the 0.9.X will be stable, legacy files it will be removed.

[gut-yu]

@overlapjho @grafandreas @iFuSiiOnzZ Hi I have met the same problem. “E:\CARLA\carla-master\carla-master\Unreal\CarlaUE4\CarlaUE4.sln”(Default target) (1) -> “E:\CARLA\carla-master\carla-master\Unreal\CarlaUE4\Intermediate\ProjectFiles\CarlaUE4.vcxproj”(Default target) (2) -> (Build target) -> E:\CARLA\carlamaster\carlamaster\Unreal\CarlaUE4\Plugins\Carla\Source\Carla\Actor\ActorBlueprintFunctionLibrary.cpp(252): error C2440: “initializing”: cannot convert from 'initializer list' to 'FActorAttribute' [E:\CARLA\carla-master\carla-master\Unreal\CarlaUE4\Intermediate\ProjectFiles\CarlaUE4.vcxproj] E:\CARLA\carlamaster\carlamaster\Unreal\CarlaUE4\Plugins\Carla\Source\Carla\Actor\ActorBlueprintFunctionLibrary.cpp(252): error C2672: 'TArray<FActorAttribute,FDefaultAllocator>::Emplace': no matching overloaded function found [E:\CARLA\carla-master\carla-master\Unreal\CarlaUE4\Intermediate\ProjectFiles\CarlaUE4.vcxproj] UnrealBuildTool : error : UBT ERROR: Failed to produce item: E:\CARLA\carlamaster\carlamaster\Unreal\CarlaUE4\Plugins\Carla\Binaries\Win64\UE4-Carla.lib [E:\CARLA\carla-master\carla-master\Unreal\CarlaUE4\Intermediate\ProjectFiles\CarlaUE4.vcxproj] C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\V140\Microsoft.MakeFile.Targets(41,5): error MSB3075: The command“"D:\AirSim Project\ue4_4.19.2\UE_4.19\Engine\Build\BatchFiles\Build.bat" CarlaUE4 Win64 Development "E:\CARLA\carla-master\carla-master\Unreal\CarlaUE4\CarlaUE4.uproject" -WaitMutex -FromMsBuild”exited with code 5. Please verify that you have sufficient rights to run this command. [E :\CARLA\carla-master\carla-master\Unreal\CarlaUE4\Intermediate\ProjectFiles\CarlaUE4.vcxproj]

I ever installed Visual Studio 2015. I have tried many ways to remove it compeletely. But it does not work. Help!

[iFuSiiOnzZ]

Hi @gut-yu

Have you tried to edit %appdata%\Unreal Engine\UnrealBuildTool\BuildConfiguration.xml setting the compiler and the version to VisualStudio2017? On the first post you have what you have to add to the file. Make a clean before before recompile again.

make clean
make launch

If is not working edit the Util\BuildTools\BuildCarlaUE4.bat and on line 134 add -2017 after -game -rocket -progress. the line should be like this -game -rocket -progress -2017 now

[gut-yu]

@iFuSiiOnzZ I've added the lines.It works. However,there is still an error as followed : “E:\CARLA\carla-master\carla-master\Unreal\CarlaUE4\CarlaUE4.sln”(Default target) (1) -> “E:\CARLA\carla-master\carlamaster\Unreal\CarlaUE4\Intermediate\ProjectFiles\CarlaUE4.vcxproj”(Default target) (2) -> (Build target) -> UnrealBuildTool : error : multiple root elements. Line 4, location 2. [E:\CARLA\carla-master\carla-master\Unreal\CarlaUE4\Intermediate\ProjectFiles\CarlaUE4.vcxproj] C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\V140\Microsoft.MakeFile.Targets(41,5): error MSB3073: command“"D: \AirSim Project\ue4_4.19.2\UE_4.19\Engine\Build\BatchFiles\Build.bat" CarlaUE4 Win64 Development "E:\CARLA\carla -master\carla-master\Unreal\CarlaUE4\CarlaUE4.uproject" -WaitMutex -FromMsBuild”exited with code 1. [E:\CARLA\carla-master\carla-master\Unreal\CarlaUE4\Intermediate\ProjectFiles\CarlaUE4.vcxproj] What should I do?

[iFuSiiOnzZ]

First time that I see that error, you XML file look like this?

<?xml version="1.0" encoding="utf-8" ?>
<Configuration xmlns="https://www.unrealengine.com/BuildConfiguration">
    <VCProjectFileGenerator>
        <Version>VisualStudio2017</Version>
    </VCProjectFileGenerator>

    <WindowsPlatform>
        <Compiler>VisualStudio2017</Compiler>
    </WindowsPlatform>
</Configuration>

[gut-yu]

I just added these lines at the end : Anything wrong?

[gut-yu]

I changed the position of these lines as you showed me . It works !!! Thanks a lot ! @iFuSiiOnzZ

[iFuSiiOnzZ]

You are welcome @gut-yu : )

[mshaheerm]

i tried 'make clean' and then 'make launch-editor' but the build fails with this error. how to fix it?

[iFuSiiOnzZ]

Hi,

Hope you found a solution, if not, try to manually delete delete the boost-install folder from Build (and if you see that the problem still persist also delete boost-src) and try again.

[adarsh9975]

Hi, i get the following error when i try to build CARLA. I have CMake in environment path, and the version is 3.12.0. I think the problem is due to the fact that it is trying to access "Documents/CARLA_Project/carla/Build/rpclib-src" inside "D:/My Documents/CARLA_Project/carla/Build/rpclib-src/build/" which was never created. Im curious as to why is it even trying to do this. The additional path looks like a clipped-off version of my parent path. Is it maybe due to the space in "My Documents" name.

Here is the console message:

D:\My Documents\CARLA_Project\carla>make launch -[Setup]: [Batch params]: --boost-toolset msvc-14.1 -[Setup]: Asynchronous jobs: 4 -[Setup]: Boost toolset: msvc-14.1 -[Setup]: Install directory: "D:/My Documents/CARLA_Project/carla/Build/" -[Setup]: Installing rpclib... -[install_rpclib]: [Batch params]: --build-dir "D:/My Documents/CARLA_Project/carla/Build/" -[install_rpclib]: Not cloning rpclib because already exists a folder called "rpclib-src". -[install_rpclib]: Generating build... CMake Error: The source directory "D:/My Documents/CARLA_Project/carla/Build/rpclib-src/build/Documents/CARLA_Project/carla/Build/rpclib-src" does not exist. Specify --help for usage, or press the help button on the CMake GUI.

-[install_rpclib]: [CMAKE ERROR] An error ocurred while executing the cmake.
-[install_rpclib]: [CMAKE ERROR] Possible causes:
-[install_rpclib]:                - Make sure "CMake" is installed.
-[install_rpclib]:                - Make sure it is available on your Windows "path".
-[install_rpclib]:                - CMake 3.9.0 or higher is required.
-[install_rpclib]: Exiting with error...

-[Setup]: Ok, and error ocurred, don't panic! We have different platforms where you can find some help :)

• Make sure you have read the documentation: http://carla.readthedocs.io/en/latest/how_to_build_on_windows/

• If the problem persists, you can ask on our Github's "Building on Windows" issue: https://github.com/carla-simulator/carla/issues/21

• Or just use our Discord channel! We'll be glad to help you there :) https://discord.gg/42KJdRj make: *** [setup] Error 1

[adarsh9975]

Ok so i solved the above problem by moving my contents to a folder with folder-name having no spaces. But now it says it cant find "CMakeLists.txt"

[adarsh9975]

I copied CMakeLists.txt from parent folder to the "rpclib_src" folder and it started compiling however it stopped with following message:

D:\Self_driving_Car_setup\CARLA_Project\carla>make launch -[Setup]: [Batch params]: --boost-toolset msvc-14.1 -[Setup]: Asynchronous jobs: 4 -[Setup]: Boost toolset: msvc-14.1 -[Setup]: Install directory: "D:/Self_driving_Car_setup/CARLA_Project/carla/Build/" -[Setup]: Installing rpclib... -[install_rpclib]: [Batch params]: --build-dir "D:/Self_driving_Car_setup/CARLA_Project/carla/Build/" -[install_rpclib]: Not cloning rpclib because already exists a folder called "rpclib-src". -[install_rpclib]: Generating build... -- The C compiler identification is MSVC 19.15.26730.0 -- The CXX compiler identification is MSVC 19.15.26730.0 -- Check for working C compiler: C:/Program Files (x86)/Microsoft Visual Studio/2017/Community/VC/Tools/MSVC/14.15.26726/bin/Hostx86/x64/cl.exe -- Check for working C compiler: C:/Program Files (x86)/Microsoft Visual Studio/2017/Community/VC/Tools/MSVC/14.15.26726/bin/Hostx86/x64/cl.exe -- works -- Detecting C compiler ABI info -- Detecting C compiler ABI info - done -- Detecting C compile features -- Detecting C compile features - done -- Check for working CXX compiler: C:/Program Files (x86)/Microsoft Visual Studio/2017/Community/VC/Tools/MSVC/14.15.26726/bin/Hostx86/x64/cl.exe -- Check for working CXX compiler: C:/Program Files (x86)/Microsoft Visual Studio/2017/Community/VC/Tools/MSVC/14.15.26726/bin/Hostx86/x64/cl.exe -- works -- Detecting CXX compiler ABI info -- Detecting CXX compiler ABI info - done -- Detecting CXX compile features -- Detecting CXX compile features - done CMake Error at CMakeLists.txt:4 (include): include could not find load file:

Build/CMakeLists.txt.in

CMake Error at CMakeLists.txt:6 (add_subdirectory): add_subdirectory given source "LibCarla/cmake" which is not an existing directory.

-- Configuring incomplete, errors occurred!

[iFuSiiOnzZ]

Hi @adarsh9975

Delete the Build folder and try again. That file should be created automatically by setup.bat (Util\BuildTools).

PS: I will try to take a look at the spaces problem when I will have some time

[adarsh9975]

Thank you @iFuSiiOnzZ I just completed my build process. The build completed successfully how ever when i launch the CarlaUE4.exe i get this:

obviously build was not proper. Build did complete successfully but i had a warning that some parts of unreal engine had to be re-built (which completed automatically successfully),also there were a lot of warnings during the unreal-rebuild. What should i do now ? I am using Unreal engine 4.19.2

[adarsh9975]

I opened the project in unreal editor. Looks like the assets can't be located. However I have downloaded the content and extracted it to " Unreal\CarlaUE4\Content\Carla ". I am using 0.8.4 content for CARLA.

This is the content folder:

Any help will be greatly appreciated.

[iFuSiiOnzZ]

You need the content for the 0.9.X as master branch is on 0.9.X. In case you need the 0.8.X you will have to checkout it.

[adarsh9975]

Seems like the assets in content folder are arranged differently for 0.8.x and 0.9.x (for example compare Blueprints/Game for both versions). I downloaded the content for 0.9.x and built the code again. Now it runs the environment. Thanks for your help @iFuSiiOnzZ

[mshaheerm]

what are these errors for? and how to fix them?

[iFuSiiOnzZ]

@mshaheerm that is because you didn't download Carla contents, take a look at Download Carla contents.

[mshaheerm]

@iFuSiiOnzZ thanks alot. fixed it.

[mshaheerm]

@iFuSiiOnzZ the problem with the boost-install still exists. in the Build folder there isnt any boost-install folder. it is being created till the time error occurs and then it is removed automatically. only boost-src which i removed and tried again but the problem was still there.

[iFuSiiOnzZ]

@mshaheerm can you provide more information of what happened during the build, any log or on screen information.

[SumerHoT]

Branch 0.9-win32 is missing. In Sep, I successed builing Carla following above steps, while recently I failed to repeat the steps, since I could not checktou the 0.9-win32 branch. What should I do now?

[iFuSiiOnzZ]

Hi @SumerHoT

Sorry, I forgot to update the main post. Currently the windows branch is on master. So you shouldn't have any problem building it it from there. Take a look at How to build on Windows, there you have the full information of how to do it.

[SumerHoT]

@iFuSiiOnzZ Thanks! So I could not blame on this and keep fighting with the linking issues now... 0_0

[SumerHoT]

Hi @iFuSiiOnzZ, While make launch, the command line report: D:\Carla\carla\LibCarla\cmake..\source\carla/sensor/CompileTimeTypeMap.h(97): error C2975: “Size”:“carla::sensor::detail::CompileTimeTypeMapImpl”的模板参数无效，应为编译时常量表达式 (编译源文件 D:\Carla\carla\LibCarla\source\carla\sensor\Deserializer.cpp) [D:\Carla\carla\Build\libcarla-visualstudio\LibCarla\cmake\server\carla_server.vcxproj] The Chinese means "the template parameters are invalid, should be constexpr(compling the source file)"

That happens in 2 files and result in total 4 errors: D:\Carla\carla\LibCarla\cmake..\source\carla/sensor/CompileTimeTypeMap.h(97) D:\Carla\carla\LibCarla\cmake..\source\carla/sensor/CompileTimeTypeMap.h(100)

Could you help to figure out what should I do with them?

[iFuSiiOnzZ]

@SumerHoT Compilation problems between clang and visual cl. Change size() with sizeof...(Items), we will try to fix it in the future.

[SumerHoT]

@iFuSiiOnzZ Thanks a lot! That works! But while compling CarlaUE4 in Unreal Engine, it shows CarlaUE4 could not be complied. Try rebuiding from source manually. The Unreal Engine is 4.19.2, and the default complier setting is VS2017 in xml. Any idea about this?

[iFuSiiOnzZ]

Of course is a compilation problem, open the file and change what i told you in the previous post.

[SumerHoT]

@iFuSiiOnzZ While compling CarleUE4 Unreal Project, two main errors occur:

1: LogCompile : error : Circular dependency detected for filename D:\Carla\carla\Unreal\CarlaUE4\Plugins\Carla\Source\Carla\Settings\QualityLevel.h! 2: D:\Carla\carla\Unreal\CarlaUE4\Plugins\Carla\CarlaDependencies\include\carla/geom/BoundingBox.h(27): error C2512: “carla::geom::Location” No suitable default constructor available.

In file: D:\Carla\carla\Unreal\CarlaUE4\Plugins\Carla\CarlaDependencies\include\carla\geom\Location.h I add: Location() {}; But I couldn't find out the way to solve Error 1#. Any suggestion?

[iFuSiiOnzZ]

Hi @SumerHoT

Those 2 errors are quite easy to fix. For the circular dependency you can leave it as it is, it builds any way or change the name of the file to QualityLevelUE.h for instances and all the includes where it appears.

For the C2512 error you will have to modify the Vector3D.h and Location.h, in Vector3D you will have to add the copy constructor and for Location add the constructors:

    Vector3D(const Vector3D &v3d)
      : x(v3d.x),
        y(v3d.y),
        z(v3d.z) {}

    Location() = default;

    Location(const Location &location)
      : Vector3D(location) {}

    Location(float ix, float iy, float iz)
      : Vector3D(ix, iy, iz) {}

Once that you have done that, it will compile the Editor but the game, as it seems that some Unreal functions are overwritten. We are currently working to fix it.

[SumerHoT]

@iFuSiiOnzZ Thanks, I modified above and then build unreal project manually and works. Do I still need to make PythonAPI now? Since there still are errors while make PythonAPI: 1#. Traceback (most recent call last): File "setup.py", line 101, in ext_modules=get_libcarla_extensions(), File "setup.py", line 51, in get_libcarla_extensions sources += [x for x in walk('dependencies/include/carla', '*.cpp')] UnboundLocalError: local variable 'walk' referenced before assignment I move the def walk to above, remake PythonAPI and then new errors occur:

2#. source/libcarla/libcarla.cpp(7): fatal error C1083: Could not open include file: “carla/Memory.h”: No such file or directory