stride3d/stride · error · ArgumentException

game is not of type EntityHierarchyEditorGame

Error message

game is not of type EntityHierarchyEditorGame

What it means

EditorGameNavigationMeshService.Initialize casts the incoming EditorServiceGame to SceneEditorGame; if the cast fails (the game passed is not the entity-hierarchy editor game) an ArgumentException is thrown, since the navigation-mesh service only works with that concrete game type.

Solutions

1. Ensure the game passed to editor services is an EntityHierarchyEditorGame (or SceneEditorGame)
2. Do not register EditorGameNavigationMeshService in a plain EditorServiceGame host
3. Check the service registration/bootstrap code to confirm which game instance is created first
4. Verify no custom subclass shadows the expected game type

Example fix

// before
var game = new EditorServiceGame(services);
navMeshService.Initialize(game);
// after
var game = new EntityHierarchyEditorGame(services);
navMeshService.Initialize(game);

if (editorGame is SceneEditorGame sceneGame) { /* safe to init navmesh service */ }

static bool SupportsNavMesh(EditorServiceGame g) => g is SceneEditorGame;

try { await service.Initialize(game); }
catch (ArgumentException ex) { log.Error(ex); /* use a non-navmesh fallback */ }

When it happens

Trigger: Registering the navigation mesh editor service with an EditorServiceGame instance that is not a SceneEditorGame/EntityHierarchyEditorGame; passing null-adjacent wrong game during editor service initialization.

Common situations: Hosting the navmesh service in a custom editor game class; constructing editor services manually with the wrong game; copy-pasted editor bootstrap code using a base EditorServiceGame.

Understand the failure class

Background: Type mismatch errors: IllegalArgumentException, TypeError and type guards across 150 open-source libraries — this error's family across 150 libraries.

Related errors

• IEntityGizmo ' ' must have a constructor with exactly one…
• The given type is not an EntityComponent type
• This operation is not supported.
• The ContentScene has not been initialized yet.
• The service [ ] requires a service of type [ ] to be…

AI-assisted analysis of stride3d/stride@96fad776d2 (2026-09-14). Data as JSON: /api/errors/97e6cca79ec43015. Report an issue: GitHub.

Appendix: source

Thrown at sources/editor/Stride.Assets.Presentation/AssetEditors/EntityHierarchyEditor/Game/EditorGameNavigationMeshService.cs:176

                {
                    displayGroup.IsVisible = isVisible;
                    foreach (var component in debugVisuals)
                    {
                        ModelComponent modelComponent;
                        if (component.Value.ModelComponents.TryGetValue(displayGroup.Id, out modelComponent))
                        {
                            modelComponent.Enabled = isVisible;
                        }
                    }
                }
            });
        }

        protected override async Task<bool> Initialize(EditorServiceGame editorGame)
        {
            if (editorGame == null) throw new ArgumentNullException(nameof(editorGame));
            game = editorGame as SceneEditorGame;
            if (game == null) throw new ArgumentException($"{nameof(game)} is not of type {nameof(EntityHierarchyEditorGame)}");

            sceneEditorController = editor.Controller as SceneEditorController;
            if (sceneEditorController == null) throw new ArgumentNullException(nameof(sceneEditorController));
            
            gameSettingsProviderService = editor.ServiceProvider.Get<GameSettingsProviderService>();
            gameSettingsProviderService.GameSettingsChanged += GameSettingsProviderServiceOnGameSettingsChanged;
            await navigationMeshManager.Initialize();

            game.SceneAdded += GameOnSceneAdded;
            game.SceneRemoved += GameOnSceneRemoved;

            // Add debug entity
            rootDebugEntity = new Entity("Navigation debug entity");
            game.EditorScene.Entities.Add(rootDebugEntity);

            // Handle added/updated navigation meshes so that they can be made visible when this scene is shown
            editor.Session.AssetPropertiesChanged += OnAssetPropertiesChanged;
            editor.Session.DeletedAssetsChanged += OnDeletedAssetsChanged;

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