bevyengine/bevy · error · EntityMutableFetchError::NotSpawned

{0}\n\n If you were attempting to apply a command to this

Error message

{0}\n\n    If you were attempting to apply a command to this entity,\n    and want to handle this error gracefully, consider using `EntityCommands::queue_handled` or `queue_silenced`.

What it means

Error "{0}\n\n If you were attempting to apply a command to this entity,\n and want to handle this error gracefully, consider using `EntityCommands::queue_handled` or `queue_silenced`." thrown in bevyengine/bevy.

Source

Thrown at crates/bevy_ecs/src/world/error.rs:53

#[error("Could not despawn entity: {0}")]
pub struct EntityDespawnError(#[from] pub EntityNotSpawnedError);

/// An error that occurs when dynamically retrieving components from an entity.
#[derive(thiserror::Error, Debug, Clone, Copy, PartialEq, Eq)]
pub enum EntityComponentError {
    /// The component with the given [`ComponentId`] does not exist on the entity.
    #[error("The component with ID {0:?} does not exist on the entity.")]
    MissingComponent(ComponentId),
    /// The component with the given [`ComponentId`] was requested mutably more than once.
    #[error("The component with ID {0:?} was requested mutably more than once.")]
    AliasedMutability(ComponentId),
}

/// An error that occurs when fetching entities mutably from a world.
#[derive(thiserror::Error, Debug, Clone, Copy, PartialEq, Eq)]
pub enum EntityMutableFetchError {
    /// The entity is not spawned.
    #[error(
        "{0}\n
    If you were attempting to apply a command to this entity,
    and want to handle this error gracefully, consider using `EntityCommands::queue_handled` or `queue_silenced`."
    )]
    NotSpawned(#[from] EntityNotSpawnedError),
    /// The entity with the given ID was requested mutably more than once.
    #[error("The entity with ID {0} was requested mutably more than once")]
    AliasedMutability(Entity),
}

/// An error that occurs when getting a resource of a given type in a world.
#[derive(thiserror::Error, Debug, Clone, Copy, PartialEq, Eq)]
pub enum ResourceFetchError {
    /// The resource has never been initialized or registered with the world.
    #[error("The resource has never been initialized or registered with the world. Did you forget to add it using `app.insert_resource` / `app.init_resource`?")]
    NotRegistered,
    /// The resource with the given [`ComponentId`] does not currently exist in the world.
    #[error("The resource with ID {0:?} does not currently exist in the world.")]

View on GitHub (pinned to 396ca72708)

Solutions

1. Check the entity is spawned (world.get_entity) before queueing the command
2. Use EntityCommands::queue_handled to receive the error instead of panicking
3. Use queue_silenced when the entity being gone is an acceptable outcome

When it happens

Trigger: Thrown at crates/bevy_ecs/src/world/error.rs:53 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of bevyengine/bevy@396ca72708 (2026-08-20). Data as JSON: /api/errors/7dad7ee8617ce43d. Report an issue: GitHub.