Error when package Custom Scenes through Unreal Editor

Hello everyone,

I want to use the Unreal Editor and customize the scene through the "Simulation 3D Scene Configuration" function of the automatic driving toolbox.

I follow the help below "Customize 3D Scenes for Vehicle Dynamics Simulations" from help center.

(https://www.mathworks.com/help/vdynblks/ug/customize-3d-scenes-for-vehicle-dynamics-simulations.html)

But when I execute the fourth step "Package Custom Scenes into Executable", I cannot successfully package the scene from Unreal Editor into an exe file, and the error "LNK1181" appears in the Unreal output log, which seems to be missing Simulation3DInterface.lib File, I don't know how to solve this problem.

The software version I use is R2020b and Unreal Engine 4.23

Best regards.

Answer 1

[Altaïr]

Hello @CHUAN-YU YAN,

This error was encountered during the migration from R2020a to R2020b. In R2020a, "Simulation3DInterface.lib" was used, but in R2020b, it seems to be replaced by "libmwshared_sim3d_io.lib". Some cached data from R2020a may cause Unreal to continue searching for "Simulation3DInterface.lib". To resolve this, I had to modify the MathWorksSimulation.Build.cs file as follows:

1. Navigate to the "UE_4.23\Engine\Plugins\Marketplace\MathWorks\Source\MathWorksSimulation" directory within the Unreal Engine's UE_4.23 folder.
2. Open the MathWorksSimulation.Build.cs file, ensuring write permissions are available.
3. Insert Console.WriteLine(""); after line 95.
4. Save the file.
5. Delete the Binaries, Saved, and Intermediate directories from the project.
6. Relaunch the project.

These steps helped resolve the issue.