Custom Node - Deserialization Problem

Unity Engine
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1

Hi. I would like to ask if anyone has ever had a problem with a custom node working in Unity Visual Scripting?
There is no more information about it in the documentation. I seem to have done everything correctly.

In the editor everything works as it should. When I do a build for the android platform, there is a problem with the deserialization of the custom node.

Logcat shows a warning:

2023.05.04 22:26:00.122 29842 29941 Warn Unity [Deserialization] Type definition for 'WaitForFinishCoroutine' is missing.
2023.05.04 22:26:00.122 29842 29941 Warn Unity Converted 'WaitForFinishCoroutine' unit to 'Unity.VisualScripting.MissingType'. Did you delete the type's script file?
2023.05.04 22:26:00.122 29842 29941 Warn Unity Unity.VisualScripting.Serialization:HandleResult(String, fsResult, Object)
2023.05.04 22:26:00.122 29842 29941 Warn Unity Unity.VisualScripting.Serialization:smile:eserializeJson(fsSerializer, String, Object&, Boolean)
2023.05.04 22:26:00.122 29842 29941 Warn Unity Unity.VisualScripting.Serialization:smile:eserializeInto(SerializationData, Object&, Boolean)
2023.05.04 22:26:00.122 29842 29941 Warn Unity Unity.VisualScripting.LudiqScriptableObject:UnityEngine.ISerializationCallbackReceiver.OnAfterDeserialize()

Here is node code:

[UnitCategory("Time")]
public class WaitForFinishCoroutine : WaitUnit
{
    [DoNotSerialize]
    public ValueInput Input { get; set; }

    [DoNotSerialize]
    [PortLabelHidden]
    [NullMeansSelf]
    public ValueInput InputMonoBehaviour { get; set; }

    protected override void Definition()
    {
        base.Definition();
        Input = ValueInput<IEnumerator>(nameof(Input));
        InputMonoBehaviour = ValueInput<MonoBehaviour>(nameof(InputMonoBehaviour), null).NullMeansSelf();
    }

    protected override IEnumerator Await(Flow flow)
    {
        yield return flow.GetValue<MonoBehaviour>(this.InputMonoBehaviour).StartCoroutine(flow.GetValue<IEnumerator>(this.Input));
        yield return this.exit;
    }
}
2

Ok. I have found the cause of this problem. It is about I2CPP and Managed Code Stripping. You need to use attribute [Preserve] before the custom class. You can find more in doc: ManagedCodeStripping

3

My solution is write a script to make link.xml content to preserve all custom unit type