UE 5.5 Source Ubuntu Building Errors

Hi everyone,

I’m working on a carla project based on UE5.5 and I can’t build the engine from source. It split a lot of errors like :

[272/2308] Compile Module.Learning.cpp
In file included from /home/steve/Xeon/dev/carla/UnrealEngine5_carla/Engine/Plugins/Experimental/LearningAgents/Intermediate/Build/Linux/x64/UnrealEditor/Development/Learning/Module.Learning.cpp:7:
/home/steve/Xeon/dev/carla/UnrealEngine5_carla/Engine/Plugins/Experimental/LearningAgents/Source/Learning/Private/LearningAdamOptimizer.cpp:8:10: fatal error: 'Learning.ispc.generated.h' file not found
    8 | #include "Learning.ispc.generated.h"
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~

I’ve followed “UE 5.5 Source Linux Compilation Errors - #2 by NuLL3rr0r” and added the following lines to my Game and Editor’s .Target.cs and rebuild:

// Disable Intel Implicit SPMD Program Compiler forced by UE 5.5 on Linux.
    bCompileISPC = false;

However, these errors occur randomly. For instance, one time it might be “fatal error: ‘Learning.ispc.generated.h’ file not found,” and the next time it could be “fatal error: ‘NNERuntimeBasicCpu.ispc.generated.h’ file not found.”

Do you know how to solve it permanently?

Best regards