unable to parse the OpenDRIVE XML string

[seuwcs]

Hello every one!

I have built carla 0.9.12 from source on Ubuntu 18.04 with the edition of Unreal Engine is 4.26.

I made maps in Roadrunner and exported to Unreal, got the 00.fbx and 00.xodr files, then import them to carla, when the map imported, it worked in UE4 like figure 1.

but when I run the script manual_control.py in the terminal, something went wrong, the error is :

ERROR: unable to parse the OpenDRIVE XML string
RuntimeError: failed to generate map
The server could not send the OpenDRIVE (.xodr) file:
Make sure it exists, has the same name of your town, and is correct.

However, I do place the file 00.xodr in the folder with the path is carla/Unreal/CarlaUE4/Content/Carla/Maps/OpenDrive/

Besides, I have tried to find solutions in
#2257
but it did not work for me, I got puzzled.
who can give me some suggestions? any help is appreciated !

More importantly. I have another computer, Ubuntu18.04, carla version is 0.9.10, Unreal Engine 4.24, surprisingly, it worked.

I really don't know how could it can't work with carla 0.9.12 and UE 4.26.

Any suggestions is appreciated! thank you very much!
@krmartin @sunpochin @Jazzinghen @cesarsouza @ItsTimmy @glopezdiest @corkyw10 @XGodina

[LucasFKobernic]

I'm having the same issues

[seuwcs]

I'm having the same issues

if you have solved the problem?

[LucasFKobernic]

Not yet,

I made the map insertion in CARLA 0.9.11 and then i copied the map folder in CARLA 0.9.12 Content folder and now i'm able to open and use the map. It is not the best solution, but it works for now.

[seuwcs]

Not yet,

I made the map insertion in CARLA 0.9.11 and then i copied the map folder in CARLA 0.9.12 Content folder and now i'm able to open and use the map. It is not the best solution, but it works for now.

It seems strange.

[seuwcs]

Not yet,

I made the map insertion in CARLA 0.9.11 and then i copied the map folder in CARLA 0.9.12 Content folder and now i'm able to open and use the map. It is not the best solution, but it works for now.

I have a question, the figure below describes the file that had been imported to UE4, in the folder, there do not exist the file that named exp0_BuiltData.uasset.

However, in the folder /carla/Unreal/CarlaUE4/Content/Carla/Maps. the map file built by carla default, do have the file whose suffix is "_BuiltData.uasset",

why the happens?

[XGodina]

Hi @seuwcs, @LucasFKobernic !! When you import a RoadRunner map into CARLA, a folder of that map is created. Inside that folder, you should put the OpenDrive with their according folder.

[seuwcs]

Hi @seuwcs, @LucasFKobernic !! When you import a RoadRunner map into CARLA, a folder of that map is created. Inside that folder, you should put the OpenDrive with their according folder.

Thanks for your advice. I have made a try, but I still got the same problem.

Firstly, I imported a map to carla from roadrunner in the folder Maps(/home/wcs/carla/Unreal/CarlaUE4/Content/Carla/Maps), like the following figure:

the new folder is named as "e1", under e1, the OpenDrive folder is created and the e1.xodr file was put under the OpenDrive folder, like this:

but when I clicked "Play" in UE4, and run the manual_control.py script under the path : carla/PythonAPI/examples, that question still exist, like this:

As you know, after the map was imported to carla, two files will be created, and usually the two files are named as : filename.umap and filename_BuiltData.uasset respectively, and they are correspond to each other. like this:

However, in the folder ExportedMaps(/home/wcs/carla/Unreal/CarlaUE4/Content/Carla/ExportedMaps), there only exist one file named :e1.umap, basicially, the file e1.BuiltData.uasset should also be created.But it didn't.

What troubles me most is why the e1.BuiltData.uasset file is not created.

Besides, the e1.xodr file had been put in the folder OpenDrive in the path: /home/wcs/carla/Unreal/CarlaUE4/Content/Carla/Maps/OpenDrive as well.

but the problem still exist (unable to parse the OpenDRIVE XML string). I really don't know why this happens.

if you know how this happened?Thanks for your advice.

[XGodina]

I will talk with our engineers about that. Now almost all our team are on holiday. I'll let you know when I know something.

[supavit-siriwan]

I got the same problem. And I fix by the following method and it woke fine.

I guess that CARLA lib is search ".xodr" from the location of ".umap".
So, I create "OpenDrive" folded beside the ".umap" file. And contain the ".xodr" file.
In my case is at "~/carla/CarlaUE4/Content/Carla/ExportedMaps"

---

And for the compiled package. I do the same after complied.
In my case is at "~/carla/Dist/CARLA_Shipping_0.9.12-dirty/LinuxNoEditor/CarlaUE4/Content/Carla/ExportedMaps"
I think the compile script did not include this folder by default.

[seuwcs]

Thank you for sharing your solution, I will have a try. Very much thanks. 在 2021-09-29 04:27:11，"Supavit Siriwan" ***@***.***> 写道：

…

I got the same problem. And I fix by the following method and it woke fine. I guess that CARLA lib is search ".xodr" from the location of ".umap". So, I create "OpenDrive" folded beside the ".umap" file. And contain the ".xodr" file. In my case is at "~/carla/CarlaUE4/Content/Carla/ExportedMaps" And for the compiled package. I do the same after complied. In my case is at "~/carla/Dist/CARLA_Shipping_0.9.12-dirty/LinuxNoEditor/CarlaUE4/Content/Carla/ExportedMaps" I think the compile script did not include this folder by default. — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub, or unsubscribe. Triage notifications on the go with GitHub Mobile for iOS or Android.

[duongtran11]

@seuwcs Did you get it work? I have the same problem while launching carla_ros_bridge.