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In the new 3Ds Max 2024 and higher, new features have been added to the Arnold render engine related to loading shaders. 

The problem occurs when you try to save your scene for a smaller version such as 3Ds Max 2022.

Since there is no implementation of backward compatibility, and even though this functionality is not present in older versions of 3Ds Max, traces of the arnoldshadersloader.gup plugin remain in the scene.

Thus, when trying to open a scene on older 3Ds Max, an error occurs related to this plugin (arnoldshadersloader.gup), which cannot be resolved. 

This is especially critical for models added to 3D Stocks, as it negatively impacts the moderation process and user experience.

The geography of this problem is quite large and Autodesk is no longer able to influence it. Thousands of 3D models have already been uploaded to 3D Stocks with this error and it is no longer possible to fix it.

So you can use Prune Scene and remove the plugin content from the scene and prepare your model properly.

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Unfortunately, at the moment there is no automatic correction for this error; processing must be done manually.

You have downloaded the model and when you open it you see the error arnoldshadersloader.gup (Imager Denoiser Oidn).

To prevent entries about the plugin from spreading to other projects and scenes, follow these steps:

After these steps, this error will disappear.

You upload a model to 3D Stock or transfer your model or scene to someone, running 3Ds Max 2023 or lower.

To do this, you need to have an older version of 3Ds Max, for example 2022. 

After these steps, this error will disappear and you will be able to send such a model to 3D Stocks or your colleagues.