bevyengine/bevy · error · ApplySceneError

Failed to apply the related {relationship_type_name} Scene a

Error message

Failed to apply the related {relationship_type_name} Scene at index {index}: {error}

What it means

Variant of ApplySceneError. A ResolvedScene holds related child scenes (via relationship targets such as Children); if one of those scenes fails to apply, the failure is wrapped as RelatedSceneError with the relationship type name, the index of the failing sub-scene, and the boxed inner error, so you can locate which child failed.

Source

Thrown at crates/bevy_scene/src/resolved_scene.rs:640

    },
    /// Caused when an cached scene is not present.
    #[error("The cached scene (id: {id:?}, path: \"{path:?}\") does not exist.")]
    MissingCachedScene {
        /// The path of the cached scene.
        path: Option<AssetPath<'static>>,
        /// The asset id of the cached scene.
        id: AssetId<ScenePatch>,
    },
    /// Caused when an cached scene has not been resolved yet.
    #[error("The cached scene (id: {id:?}, path: \"{path:?}\") has not been resolved yet.")]
    UnresolvedCachedScene {
        /// The path of the cached scene.
        path: Option<AssetPath<'static>>,
        /// The asset id of the cached scene.
        id: AssetId<ScenePatch>,
    },
    /// Caused when a related [`ResolvedScene`] fails to apply.
    #[error(
        "Failed to apply the related {relationship_type_name} Scene at index {index}: {error}"
    )]
    RelatedSceneError {
        /// The type name of the relationship.
        relationship_type_name: &'static str,
        /// The index of the related scene that failed to apply.
        index: usize,
        /// The error that occurred when applying the related scene.
        error: Box<ApplySceneError>,
    },
}

/// A collection of [`ResolvedScene`]s that are related to a given [`ResolvedScene`] by a [`Relationship`].
/// Each [`ResolvedScene`] added here will be spawned as a new [`Entity`] when the "parent" [`ResolvedScene`] is spawned.
pub struct RelatedResolvedScenes {
    /// The related resolved scenes. Each entry in the list corresponds to a new related entity that will be spawned with the given scene.
    pub scenes: Vec<ResolvedScene>,
    /// The function that will be called to add the relationship to the spawned related scene.

View on GitHub (pinned to 396ca72708)

Solutions

1. Use the index and relationship_type_name fields to find the exact failing sub-scene in your scene definition
2. Inspect and fix the inner boxed ApplySceneError (often TemplateBuildError deep in the hierarchy)
3. Apply child scenes individually during development to bisect which one fails

match result {
    Err(ApplySceneError::RelatedSceneError { relationship_type_name, index, error }) => {
        error!("{relationship_type_name} scene #{index} failed: {error}");
    }
    _ => {}
}

When it happens

Trigger: Calling resolved.spawn/apply on a scene whose Children (or other relationship) list contains a sub-scene that itself fails to apply; the apply loop hits the failing index and wraps the error.

Common situations: Large nested BSN hierarchies where one deep child has a broken template or entity reference; relationship scenes loaded from assets that drifted out of sync with component definitions.

Related errors

• Failed to apply the cached Scene (asset path: "{cached:?}"):
• Failed to build a Template in the current Scene: {0}
• This scene has not been resolved yet and cannot be spawned.
• Couldn't create an instance of `{name}` using the reflected
• GLTF model must be a tree, found cycle instead at node indic

AI-assisted analysis of bevyengine/bevy@396ca72708 (2026-08-20). Data as JSON: /api/errors/6d9382cbbcad5c17. Report an issue: GitHub.