Cannot compile Blocks environment on Ubuntu 18.04

[nikitabeebe]

Question

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I am trying to run the basic blocks environment on UE 4.25.4 with my Ubuntu 18.04 and latest release of Airsim. I can successfully compile Airsim, and can open up UE4 through the UnrealEngine binary folder within Arisim. However when I go to browse for the blocks environments, I receive a warning either that this has been built with a different engine and asking if I want to make a copy, or other times I receive an error 'Missing Blocks Module' that the following modules are built with a different engine (Blocks, Airsim) and asking if I want to rebuild. Neither of these options work, and Unreal either briefly loads Blocks then my entire computer freezes screen, I receive the warning it cannot compile and to open in Null source code, or that Engine modules are out of date and cannot be compiled, try building with IDE.

I have tried building and running with QTCreator using the settings from Unreal Engine, but I recieve this error after trying to create a copy of the blocks enviroment: Fatal error: [File:/home/summer-dev/Desktop/repos/airsim/UnrealEngine/Engine/Source/Runtime/Core/Private/Unix/UnixPlatformMemory.cpp] [Line: 1029] Ran out of memory allocating 10162176 bytes with alignment 4096 Signal 11 caught. Malloc Size=65538 LargeMemoryPoolOffset=131122 Malloc Size=699880 LargeMemoryPoolOffset=831032 The program has unexpectedly finished. The process was ended forcefully. /home/summer-dev/repos/airsim/UnrealEngine/Engine/Binaries/Linux/UE4Editor crashed.

Include context on what you are trying to achieve

N/A

Context details

Ubuntu 18.04, UE 4.25.4 All default settings

Include details of what you already did to find answers

I have recloned Airsim, tried running through command line, installed Vulkan as I initially I had an issue and was forced to use -opengl4 (though that no longer works).

Any thoughts on where I might have gone wrong? Everything compiles with .setup, .build, .GenerateProjectFiles without issue up until trying to run Blocks.

[SamPusegaonkar]

Are you sure you are cloning and building the right version of Unreal? I had the same issue while building as I installed unreal from their repo and not the exact specific version.

Try building again using this: git clone -b 4.25 https://github.com/EpicGames/UnrealEngine.git cd UnrealEngine ./Setup.sh ./GenerateProjectFiles.sh make

(Source: https://microsoft.github.io/AirSim/build_linux)

[nikitabeebe]

Thanks, I'll give that a try. I thought I downloaded the right version, but I'll re-download from the instructions on AirSim. Fingers crossed that was the only issue!

[Astaxuqichao]

i use Unreal 4.27, and encounter the same situation.

[talha-opteran]

Is there any way to resolve this problem? I'm also encountering the same problem with Unreal 4.27

[bozcani]

I was getting similar message on Ubuntu 20.04 with Unreal 4.27.1. When I opened "Blocks.uproject" in Editor, I got the following message: Engine modules are out of date and cannot be compiled, try building with IDE.

It is solved after building the environment from the terminal:

$ <path to Unreal Engine>/Engine/Build/BatchFiles/Linux/Build.sh Linux Development -Project=<path to Blocks project>/Blocks.uproject -TargetType=Editor

[talha-opteran]

Thanks @bozcani. For anyone using VSCode, I also managed to get it run by opening the VSCode workspace file generated when trying to open the Blocks.uproject file with the UE editor. In VSCode, press Ctrl + Shift + B to open menu for building tasks and run the task for BlocksEditor Linux Development Build. This essentially runs the same command as above.

[zimmy87]

Hey @nikitabeebe, are you still experiencing the issue described in your original post?