Trouble Getting Set Up With ML-Agents Demo

[kakiti3]

Describe the bug

Hopefully this is the right forum for this. Attempting to run the ml-agents demo and running into some compile errors. After following the installation instructions from the repo, I attempt to run the scene, but encounter the following errors:

• 'ModelAsset' does not contain a definition for 'modelAssetData' and no accessible extension method...
• 'ModelAssetData' is inaccessible due to its protection level
• Creating missing agent component for DevisionRequester in Agent

The scene also has pink agents instead of the textures pictured in the instructions. Figured I might have messed up the install somehow. Any ideas?

To Reproduce
Hard to recommend steps to reproduce since I thought I followed the instructions properly and am trying to figure out what went wrong.

Console logs / stack traces
Please wrap in triple backticks (```) to make it easier to read.

Screenshots

Environment (please complete the following information):

• Unity Version: Unity 6000.0.25f1
• OS + version: Mac Sonoma 14.7.1
• ML-Agents version: latest develop
• Torch version: n/a
• Environment: n/a

[MoonCrowned]

As for me, just comment these two lines - 307 & 308. I've just started, but after commenting training the 3d balls scene is working.
And dont use development branch - return some commits earlier to release_22_mm branch.

[kakiti3]

Switched from develop to release_22_mm and commented out lines 307/308 in ModelOverrider.cs. This seems to address the warnings, but not the other errors (ones in red). Were you still getting those after your fix above?

[miguelalonsojr]

Hmm... you seem to have an outdated version of the repo. I can't repro this on the latest version of the develop branch. Have a look here:

ml-agents/Project/Assets/ML-Agents/Examples/SharedAssets/Scripts/ModelOverrider.cs

Line 305 in cfb26e3

// asset.modelAssetData = ScriptableObject.CreateInstance<ModelAssetData>();

Those lines are already commented.

[miguelalonsojr]

I also noticed from the screen cap, you're using U6. Can you try the following with U 2023.2?

In the repo:

git checkout develop
git pull
git clean -fxd

This will reset your repo to a freshly cloned state. Then try to open it with 2023.2.

Note: I'll be updating the develop branch to U6 in December.

[kakiti3]

So I switched over to Unity 2023.2.20f1 (assuming that's the version you were referring to) and reset to a clean version of the develop branch. Ran into the same bugs. Note:

• Following the instructions from the repo Readme, and after switching versions and resetting the repo, I loaded the ml-agents package from the Package Manager using the "load from disk" option and navigating to ml-agents/com.unity.ml-agents/package.json.
• It successfully loaded the package, but the sample 3D Ball scene was 0 KB
• Had the option of loading the scene directly from the project home screen, but when I did it didn't render, instead giving me the same bugs as before

Any thoughts?

[miguelalonsojr]

This is an issue with the ModelOverrider.cs file, which is only in the repo Project. Can you check your local version of the ModelOverrider.cs file and confirm that lines 305 and 306 are commented out? Also, are you using a fork or a direct clone of the repo?

[kakiti3]

ModelOverrider.cs:305-306 were indeed commented out. And I'm using a direct clone of the repo, which tracks develop.