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If you open the "ActionEditor" window, you will get an error starting the game.

error :

Resolve of invalid GC handle. The handle is from a previous domain. The resolve operation is skipped.
UnityEngine.GUILayout:Window (int,UnityEngine.Rect,UnityEngine.GUI/WindowFunction,string,UnityEngine.GUIStyle,UnityEngine.GUILayoutOption[])
AC.ActionListEditorWindow:NodesGUI (bool,UnityEngine.Event) (at Assets/AdventureCreator/Scripts/ActionList/Editor/ActionListEditorWindow.cs:1606)
AC.ActionListEditorWindow:OnGUI () (at Assets/AdventureCreator/Scripts/ActionList/Editor/ActionListEditorWindow.cs:245)
UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&)


  • Unity:2021.3.8 AC:1.75.6

  • Every action will give one error.

  • This may be a Unity issue.

    Does it occur for every ActionList, or one in particular, and does it prevent the game from running?

  • @ChrisIceBox Every ActionList. Doesn't stop the game from running. If the "ActionEditor" tab is not open, there will be no error.

  • Does this occur for either of the two demo games as well?

    Also, when did this issue start occuring? After updating either Unity or AC, or was it working correctly before with the same versions?

  • @ChrisIceBox Yes! Unity2021.3.6 does not get an error. Unity2021.3.8 will have an error.

  • Thanks for the details, I have reproduced the error.

    It does indeed look to be a Unity issue - I will see about submitting a bug report to them.

    Fortunately, the error itself looks to be harmless - it doesn't impact AC itself, and can also be removed by enabling "Enter Play Mode Options" in the Project Setting's Editor panel.

  • @ChrisIceBox
    Unity2021.3.10 still has alarm error.
    Does AC support "Enter Play Mode Options"? This feature looks good.

  • Other than the message that appears, yes - it should work. Again, the message doesn't impact AC and can be ignored.

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