Carla: Fail to build Unreal Engine

Created on 16 May 2018 · 10Comments · Source: carla-simulator/carla

Hi all,

I am trying to build CARLA from source on Ubuntu 16.04. I follow the steps and have managed to clone Unreal Engine but the ./Setup.sh command fails. It happens every time that it fails when updating dependencies. Suddenly stops at 99% and throws an error. I have done some research on google but I have not been able to find a suitable solution. The internet connection is ok.

I would appreciate some help. Thanks in advance.

The following is the terminal log:

MIGUEL:~$ sudo apt-get install build-essential clang-3.9 git cmake ninja-build python3-requests python-dev tzdata sed curl wget unzip autoconf libtool
[sudo] password for MIGUEL: 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
autoconf is already the newest version (2.69-9).
build-essential is already the newest version (12.1ubuntu2).
libtool is already the newest version (2.4.6-0.1).
python3-requests is already the newest version (2.9.1-3).
sed is already the newest version (4.2.2-7).
unzip is already the newest version (6.0-20ubuntu1).
ninja-build is already the newest version (1.5.1-0.1ubuntu1).
cmake is already the newest version (3.5.1-1ubuntu3).
curl is already the newest version (7.47.0-1ubuntu2.7).
git is already the newest version (1:2.7.4-0ubuntu1.3).
python-dev is already the newest version (2.7.12-1~16.04).
tzdata is already the newest version (2017c-0ubuntu0.16.04).
wget is already the newest version (1.17.1-1ubuntu1.4).
clang-3.9 is already the newest version (1:3.9.1-4ubuntu3~16.04.2).
0 upgraded, 0 newly installed, 0 to remove and 4 not upgraded.
MIGUEL:~$ sudo update-alternatives --install /usr/bin/clang++ clang++ /usr/lib/llvm-3.9/bin/clang++ 100
MIGUEL:~$ sudo update-alternatives --install /usr/bin/clang clang /usr/lib/llvm-3.9/bin/clang 100
MIGUEL:~$ git clone --depth=1 -b 4.18 https://github.com/EpicGames/UnrealEngine.git ~/UnrealEngine_4.18
Cloning into '/home/MIGUEL/UnrealEngine_4.18'...
Username for 'https://github.com': SpakMiguel
Password for 'https://[email protected]': 
remote: Counting objects: 78600, done.
remote: Compressing objects: 100% (61677/61677), done.
remote: Total 78600 (delta 16208), reused 68294 (delta 14949), pack-reused 0
Receiving objects: 100% (78600/78600), 160.48 MiB | 528.00 KiB/s, done.
Resolving deltas: 100% (16208/16208), done.
Checking connectivity... done.
Checking out files: 100% (82677/82677), done.
MIGUEL:~$ cd ~/UnrealEngine_4.18
MIGUEL:~/UnrealEngine_4.18$ ./Setup.sh
Registering git hooks... (this will override existing ones!)

Github build
Checking / downloading the latest archives
Checking dependencies (excluding Win32, Win64, Mac, Android)...
Updating dependencies:  99% (28390/28391), 4870.5/4892.6 MiB | 14.78 MiB/s...
Failed to download 'http://cdn.unrealengine.com/dependencies/2839850-632f4ca3f7a5496781b581496d5328d0/c00facf08e7d27b584bb1a8fdb7dcd0388c228f6': Can't read from pack stream (CorruptPackFileException)
Result: 1

question ue4

Source

ghost

Most helpful comment

Hi @SpakMiguel,
This is more related to Unreal Engine so you would find much more support on the Unreal Page.

I had a similar problem, but I recognised that the cause of that was:
some of the dependencies needed to be installed from online but the web address they were accessing was blocked by my organisation. (For you, it may be blocked for some other reason).

I tried various ways to make it work and was successful with one method. So I decided to make a script file for my method. Although I cannot share the complete script file (It has other things I cannot share), I can paste the relevant part here:

cd ~/
CORES=$(nproc --all)
CORES=$((CORES / 2))
git clone --depth=1 -b 4.18 https://github.com/EpicGames/UnrealEngine.git ~/UnrealEngine_4.18
cd ~/UnrealEngine_4.18/
find ./ -type f -exec sed -i 's/http\:\/\/cdn\.unrealengine/https\:\/\/cdn\.unrealengine/g' {} \;
sudo ./Setup.sh
cd ~/
sudo chmod -R 777 UnrealEngine_4.18
cd ~/UnrealEngine_4.18/
./GenerateProjectFiles.sh
make -j ${CORES}
cd ~/
./UnrealEngine_4.18/Engine/Build/BatchFiles/Linux/Build.sh ShaderCompileWorker Linux Development -verbose

I hope this works for you too.
The key statement is:

find ./ -type f -exec sed -i 's/http\:\/\/cdn.unrealengine/https\:\/\/cdn.unrealengine/g' {} \;

This basically changes http://cdn.unrealengine to https://cdn.unrealengine
And I needed to run the ./Setup.sh with sudo rights for some of my own reasons, but that caused some of the folders created during installation to have rw access for just root (Thats why in the documentation of Unreal Engine is a statement: For the love of god don't run ./Setup with sudo), but because that needed to be done, I had to reset the permissions with chmod.
And the last line is basically because the shader compile worker frequently did not compile for my system. (happened almost every 3rd time)

YashBansod on 17 May 2018

👍2

All 10 comments

Hi @SpakMiguel,
This is more related to Unreal Engine so you would find much more support on the Unreal Page.

cd ~/
CORES=$(nproc --all)
CORES=$((CORES / 2))
git clone --depth=1 -b 4.18 https://github.com/EpicGames/UnrealEngine.git ~/UnrealEngine_4.18
cd ~/UnrealEngine_4.18/
find ./ -type f -exec sed -i 's/http\:\/\/cdn\.unrealengine/https\:\/\/cdn\.unrealengine/g' {} \;
sudo ./Setup.sh
cd ~/
sudo chmod -R 777 UnrealEngine_4.18
cd ~/UnrealEngine_4.18/
./GenerateProjectFiles.sh
make -j ${CORES}
cd ~/
./UnrealEngine_4.18/Engine/Build/BatchFiles/Linux/Build.sh ShaderCompileWorker Linux Development -verbose

I hope this works for you too.
The key statement is:

find ./ -type f -exec sed -i 's/http\:\/\/cdn.unrealengine/https\:\/\/cdn.unrealengine/g' {} \;

YashBansod on 17 May 2018

👍2

Hi @SpakMiguel,

I'm not able to reproduce your error, I feel bad but seems a connection error to me :(
Have you achieved something new?

marcgpuig on 17 May 2018

Hi @marcgpuig ,

It was a connection error yes, similar to what happened to @YashBansod (Thanks btw!). I managed to solve it though.
I have successfully built Unreal Engine but Carla crashes when executing CarlaUE4.sh from the already built version. I do not know why I am getting a Segmentation fault every time. My connection works fine and Carla files have all the right permissions. You can find attached the log to see if you can help me.

Thanks,

LOG.txt

ghost on 24 May 2018

It was a graphic card drivers issue. Solved.

It worked for me to reinstall drivers. Carla runs fine now.

ghost on 24 May 2018

@SpakMiguel
I'm happy to hear that!
Thanks for your feedback :)

marcgpuig on 24 May 2018

Unreal Engine 4.18 loads with opengl3 but Carla "./CarlaEu4.sh -opengl3 throws segmentation fault. Without opengl3 it throws an opengl4.3 error, could not open.

Please help me solve this issue. I tested on multiple systems with GPU and without GPU but same error.

Operating system - Ubuntu 16.04
System 1 - i7 processor, 4gb ram, nvidia quadro 600 graphics (Dell T1500)
System 2 - i5 processor, 8gb ram, intel hd graphics ( Dell Vostro)

zeroenergyhere on 14 Jul 2018

Hi @zeroenergyhere, which drivers are you using?

marcgpuig on 16 Jul 2018

I tried find ./ -exec sed -i 's#http://cdn.unrealengine/https://cdn.unrealengine#g' {} \;

but still the setup.sh stops after 99%. i have downloaded the gzip file of the missing depedency.
anyone can help me to fix this?

jaypee92 on 12 Feb 2020

Failed to download 'https://cdn.unrealengine.com/dependencies/UnrealEngine-4690078-25be7614c4f74274adc1c3cb1d6e032e/d4b6bc525135e5f3997bc740127b9f8e5a064369': Error: TrustFailure (The authentication or decryption has failed.) (WebException)
Result: 1

jaypee92 on 12 Feb 2020

Failed to download 'https://cdn.unrealengine.com/dependencies/UnrealEngine-4690078-25be7614c4f74274adc1c3cb1d6e032e/d4b6bc525135e5f3997bc740127b9f8e5a064369': Error: TrustFailure (The authentication or decryption has failed.) (WebException)
Result: 1

have you resolved this problem，i can download this file by html,but it failed when ./Setup.sh