ValueError: role_name: colors must have 3 channels (R, G, B) occurs when using get_blueprint_library().

[seominseokt]

CARLA version: 0.9.15 Platform/OS: Windows 11

When using the get_blueprint_library method, it returns the following error:

---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
Cell In[3], line 1
----> 1 blueprint_library = world.get_blueprint_library()

ValueError: role_name: colors must have 3 channels (R,G,B

I haven't found any other issues that match this problem. Where could this issue be occurring?

[jiushixiensi]

I also encountered the same problem and wanted to ask if the problem was solved.

[chuanye-Wang]

Some issue. Besides, I run manual_control.py and encounter the same error

[ghost]

@jiushixiensi @chuanye-Wang Did you guys solve it? Let me know when you do.

[chuanye-Wang]

commit: 4da0c7415499981f29874b899edd00c1368df06f This commit wworks just fine.

[ghost]

@chuanye-Wang

Thank you!! It works correctly after rolling back as follows:

git reset --hard "4da0c74"

However, this is a temporary solution, so I'll keep the issue open for now.

[chuanye-Wang]

Just reverse to commit as I mentioned above, But it's just a temporary solution

[Turuu1124]

i tried running git reset --hard "4da0c74" but i am still getting the same issue

[Nithin-Supani]

@chuanye-Wang @seominseokt

I tried your temporary solution to roll back "git reset --hard "4da0c74", then rebuild PythonAPI and make launch. But this solved the error "ValueError: role_name: colors must have 3 channels (R,G,B)"

i am getting new error when i try to spawn a camera and attach it to the vehicle:

53 camera_init_trans = carla.Transform(carla.Location(z=CAMERA_POS_Z,x=CAMERA_POS_X)) 54 #this creates the camera in the sim ---> 55 camera = world.spawn_actor(camera_bp,camera_init_trans,attach_to=vehicle) 57 def camera_callback(image,data_dict): 58 data_dict['image'] = np.reshape(np.copy(image.raw_data),(image.height,image.width,4))

RuntimeError: rpc::rpc_error during call in function spawn_actor_with_parent

This is the same case if i run any generate_traffic.py:

python generate_traffic.py WARNING: Version mismatch detected: You are trying to connect to a simulator that might be incompatible with this API WARNING: Client API version = 0.9.15 WARNING: Simulator API version = 0.9.15-221-g4da0c7415-dirty

destroying 0 vehicles

destroying 0 walkers

done. Traceback (most recent call last): File "/home/milab/carla/PythonAPI/examples/generate_traffic.py", line 374, in main() File "/home/milab/carla/PythonAPI/examples/generate_traffic.py", line 247, in main for response in client.apply_batch_sync(batch, synchronous_master): RuntimeError: rpc::rpc_error during call in function apply_batch

[chuanye-Wang]

Hi, I got the same error as you did before, but still did't figure out a complete solution.

However, I get another temporary solution. Because of my perpose to choose carla-dev is to use its digital-twin-tool. So I just use release version(carla 0.9.15) to validate my code, then I can spawn any actors including sensors successfully.

I dont know if this can help you.

[chuanye-Wang]

BTW, I have another guess: rpc::rpc_error is a romote call error, it means the mismatch of the version between Carla-dev and PythonAPI, so if you dont run ./Update.sh during the buiding carla process, maybe it wont have this issue then.

[Nithin-Supani]

I ran ./Update.sh before building the PythonAPI, it said content is up-to-date.

even now if i run ./Update.sh i get content is up-to-date.

but i used to get this warning before rolling back also: "WARNING: Version mismatch detected: You are trying to connect to a simulator that might be incompatible with this API WARNING: Client API version = 0.9.15 WARNING: Simulator API version = 0.9.15-221-g4da0c7415-dirty"

isn't client and simulator API version same 0.9.15?

[chuanye-Wang]

It is the same version in general, but it's different in detail.

I mean you donot run ./update.sh during the building process. So that your carla and PythonAPI would both being the old version.

Or you can try to use release version to validate your code, and use carla-dev to edit map.

what's your perpose to use carla-dev

[stavtant]

Windows 10 Pro GeForce RTX 4060 carla 0.9.15 UE4

I face the same issue (ValueError: role_name: colors must have 3 channels (R,G,B)) when i try to run scripts after importing a vehicle which I made via Blender. The strange thing is that only the dynamic weather is working. I tried switching python versions but it didn't work. When I delete the vehicle which I made, from CarlaUE4 editor, the error I'm facing is:

WARNING: Version mismatch detected: You are trying to connect to a simulator that might be incompatible with this API WARNING: Client API version = 0.9.15 WARNING: Simulator API version = 0.9.15-221-g4da0c7415-dirty INFO: Found the required file in cache! Carla/Maps/Nav/Town10HD_Opt.bin INFO: Found the required file in cache! Carla/Maps/TM/Town10HD_Opt.bin

destroying 0 vehicles destroying 0 walkers

done. Traceback (most recent call last): File "C:\carla\PythonAPI\examples\generate_traffic.py", line 379, in main() File "C:\carla\PythonAPI\examples\generate_traffic.py", line 247, in main for response in client.apply_batch_sync(batch, synchronous_master): RuntimeError: rpc::rpc_error during call in function apply_batch

Any ideas?

[Nithin-Supani]

It is the same version in general, but it's different in detail.

I mean you donot run ./update.sh during the building process. So that your carla and PythonAPI would both being the old version.

Or you can try to use release version to validate your code, and use carla-dev to edit map.

what's your perpose to use carla-dev

Yes, I was planning to do the same thing. For now I just wanted to build a custom car form the Carla-dev.

[chuanye-Wang]

You can edit your custom car in carla-dev, export it as an asset, then import your custom car assets into a realse version of carla (e.x. carla 0.9.15).In the release version, it wont have the RGB issue or rpc issue.

I can tell you, that's the way I check my custom map,and do further development.

[stavtant]

**A mini update, i find out that on PythonAPI folder there is no dist folder which should contain the .egg or .whl file. I tried again the make PythonAPI command and nothing changed although on prompt the output was: Carla lib for python has been successfully installed in "C:\carla\PythonAPI\carla\dist". Anyone know why?

[Turuu1124]

try deleting your PythonAPI folder and then run make PythonAPI again, it fixed it for me the 2nd time i did this

[stavtant]

I did this many times, not just once and it didn't fix the problem. :(

[rebekapolei111]

does someone solve this problem?

[stavtant]

SOLUTION!! Follow these steps. In a terminal: git fetch --all --tags git checkout 0.9.15

In x64 native tools prompt: make PythonAPI make launch

[enn25]

SOLUTION!! Follow these steps. In a terminal: git fetch --all --tags git checkout 0.9.15

In x64 native tools prompt: make PythonAPI make launch

I followed the same steps as you mentioned but while running make PythonAPI i am getting this error. Can someone explain why it is showing or know how to fix?Note : I am using Ubuntu 22.04,16 GB RAM, i5 13th H series, RTX 4050..

Util/BuildTools/Linux.mk:163: warning: overriding recipe for target 'downloadplugins' Util/BuildTools/Linux.mk:142: warning: ignoring old recipe for target 'downloadplugins' Setup.sh: boost-1.80.0-c10 already installed. Setup.sh: rpclib-v2.2.1_c5-c10 already installed. Setup.sh: gtest-1.8.1-c10 already installed. Setup.sh: recast-c10 already installed. Setup.sh: Libpng already installed. Setup.sh: Xerces-c already installed. Setup.sh: Eigen already installed. Setup.sh: Sqlite already installed. Setup.sh: PROJ already installed. Setup.sh: Patchelf already installed. Setup.sh: CARLA version 0.9.15-dirty. Setup.sh: Generating CMake configuration files. Setup.sh: Success! BuildLibCarla.sh: Building LibCarla "Client.Release" configuration. ninja: no work to do. [0/1] Install the project... -- Install configuration: "Client" BuildLibCarla.sh: Success! BuildOSM2ODR.sh: Building OSM2ODR. fatal: reference is not a tree: 1835e1e9538d0778971acc8b19b111834aae7261 make: *** [Util/BuildTools/Linux.mk:157: osm2odr] Error 128

[stavtant]

I'm using Windows 10 Pro Platform not Ubuntu so I can't help :(

SOLUTION!! Follow these steps. In a terminal: git fetch --all --tags git checkout 0.9.15 In x64 native tools prompt: make PythonAPI make launch

I followed the same steps as you mentioned but while running make PythonAPI i am getting this error. Can someone explain why it is showing or know how to fix?Note : I am using Ubuntu 22.04,16 GB RAM, i5 13th H series, RTX 4050..

Util/BuildTools/Linux.mk:163: warning: overriding recipe for target 'downloadplugins' Util/BuildTools/Linux.mk:142: warning: ignoring old recipe for target 'downloadplugins' Setup.sh: boost-1.80.0-c10 already installed. Setup.sh: rpclib-v2.2.1_c5-c10 already installed. Setup.sh: gtest-1.8.1-c10 already installed. Setup.sh: recast-c10 already installed. Setup.sh: Libpng already installed. Setup.sh: Xerces-c already installed. Setup.sh: Eigen already installed. Setup.sh: Sqlite already installed. Setup.sh: PROJ already installed. Setup.sh: Patchelf already installed. Setup.sh: CARLA version 0.9.15-dirty. Setup.sh: Generating CMake configuration files. Setup.sh: Success! BuildLibCarla.sh: Building LibCarla "Client.Release" configuration. ninja: no work to do. [0/1] Install the project... -- Install configuration: "Client" BuildLibCarla.sh: Success! BuildOSM2ODR.sh: Building OSM2ODR. fatal: reference is not a tree: 1835e1e9538d0778971acc8b19b111834aae7261 make: *** [Util/BuildTools/Linux.mk:157: osm2odr] Error 128

[enn25]

I'm using Windows 10 Pro Platform not Ubuntu so I can't help :(

SOLUTION!! Follow these steps. In a terminal: git fetch --all --tags git checkout 0.9.15 In x64 native tools prompt: make PythonAPI make launch

I followed the same steps as you mentioned but while running make PythonAPI i am getting this error. Can someone explain why it is showing or know how to fix?Note : I am using Ubuntu 22.04,16 GB RAM, i5 13th H series, RTX 4050.. Util/BuildTools/Linux.mk:163: warning: overriding recipe for target 'downloadplugins' Util/BuildTools/Linux.mk:142: warning: ignoring old recipe for target 'downloadplugins' Setup.sh: boost-1.80.0-c10 already installed. Setup.sh: rpclib-v2.2.1_c5-c10 already installed. Setup.sh: gtest-1.8.1-c10 already installed. Setup.sh: recast-c10 already installed. Setup.sh: Libpng already installed. Setup.sh: Xerces-c already installed. Setup.sh: Eigen already installed. Setup.sh: Sqlite already installed. Setup.sh: PROJ already installed. Setup.sh: Patchelf already installed. Setup.sh: CARLA version 0.9.15-dirty. Setup.sh: Generating CMake configuration files. Setup.sh: Success! BuildLibCarla.sh: Building LibCarla "Client.Release" configuration. ninja: no work to do. [0/1] Install the project... -- Install configuration: "Client" BuildLibCarla.sh: Success! BuildOSM2ODR.sh: Building OSM2ODR. fatal: reference is not a tree: 1835e1e9538d0778971acc8b19b111834aae7261 make: *** [Util/BuildTools/Linux.mk:157: osm2odr] Error 128

Ohk Let me try again from beginning hope it fix after that. I just have a doubt whether you directly used these command that you said after the value error or rpc error?

EDITED : THE ERROR WAS FIXED WHEN I DELETED THE WHOLE CARLA FILE AND RE DOWNLOADED AND USED ./Update.sh COMMAND, AND AFTER THAT I DIRECTLY USED THE ABOVE MENTIONED SOLUTION AND IT WORKED. THANK YOU. IF ANYONE USES UBUNTU CAN USE THIS METHOD WORKED FOR ME.

[saltyfishxbr]

I've solved this. Maybe you build your carla from source. But your carla pythonAPI is not the one you made from source. If you build your carla from source, you need to use the built carla pythonAPI in carla/PythonAPI/carla/dist/carla-xxx.whl Do not use pip install carla directly from network. It doesn't match your carla version

[daohu527]

As @saltyfishxbr said. There will be an error message indicating that the Python API version is inconsistent (other versions have been installed before). Use the following command to reinstall solved the problem.

make PythonAPI

pip3 install PythonAPI/carla/dist/carla-xxx.whl --force-reinstall

[Sephiroth1118]

As @saltyfishxbr said. There will be an error message indicating that the Python API version is inconsistent (other versions have been installed before). Use the following command to reinstall solved the problem.

make PythonAPI

pip3 install PythonAPI/carla/dist/carla-xxx.whl --force-reinstall

Hi! My carla-dev is built from source and has the same problem. This solution worked well. But recently I'm working on a project that use python 3.8.10, the wheel file in PythonAPI/carla/dist/ only has the cp310, which is the version for python 3.10. I can not install the wheel. Do you know where I can find the cp38 version for carla-dev? Thank you so much!

[a2mar]

As @saltyfishxbr said. There will be an error message indicating that the Python API version is inconsistent (other versions have been installed before). Use the following command to reinstall solved the problem.

make PythonAPI

pip3 install PythonAPI/carla/dist/carla-xxx.whl --force-reinstall

Hi! My carla-dev is built from source and has the same problem. This solution worked well. But recently I'm working on a project that use python 3.8.10, the wheel file in PythonAPI/carla/dist/ only has the cp310, which is the version for python 3.10. I can not install the wheel. Do you know where I can find the cp38 version for carla-dev? Thank you so much!

For that, you can download the binary version of CARLA (the overnight build on github). You can find the whl under the proposed path in the reinstallation command that was provided in the penultimate comment.

Worked for me.

[rohanNkhaire]

@chuanye-Wang Hey, I generated a map using the digital twin tool. I wanted to export it as an asset. Could you tell me how do I do that?

[chuanye-Wang]

@chuanye-Wang Hey, I generated a map using the digital twin tool. I wanted to export it as an asset. Could you tell me how do I do that?

@rohanNkhaire Just follow the steps right here: https://carla.readthedocs.io/en/latest/tuto_content_authoring_maps/#exporting-a-map BTW, did you solve the API problem above?

[Sephiroth1118]

As @saltyfishxbr said. There will be an error message indicating that the Python API version is inconsistent (other versions have been installed before). Use the following command to reinstall solved the problem.

make PythonAPI

pip3 install PythonAPI/carla/dist/carla-xxx.whl --force-reinstall

Hi! My carla-dev is built from source and has the same problem. This solution worked well. But recently I'm working on a project that use python 3.8.10, the wheel file in PythonAPI/carla/dist/ only has the cp310, which is the version for python 3.10. I can not install the wheel. Do you know where I can find the cp38 version for carla-dev? Thank you so much!

For that, you can download the binary version of CARLA (the overnight build on github). You can find the whl under the proposed path in the reinstallation command that was provided in the penultimate comment.

Worked for me.

Thanks a lot for your reply! It worked for me!