bevyengine/bevy · error · ApplyError

variant with name `{variant_name}` does not exist on enum `{

Error message

variant with name `{variant_name}` does not exist on enum `{enum_name}`

What it means

ApplyError::MissingVariant — try_apply on enums found the source's variant name does not exist on the destination enum type. Payloads: variant_name and enum_name. Apply values whose variant is defined on the target enum (or use patching with dynamic enums).

Source

Thrown at crates/bevy_reflect/src/reflect.rs:61

    MismatchedTypes {
        /// Type of the value we attempted to apply.
        from_type: Box<str>,
        /// Type we attempted to apply the value to.
        to_type: Box<str>,
    },

    #[error("attempted to apply type with {from_size} size to a type with {to_size} size")]
    /// Attempted to apply an [array-like] type to another of different size, e.g. a [u8; 4] to [u8; 3].
    ///
    /// [array-like]: crate::array::Array
    DifferentSize {
        /// Size of the value we attempted to apply, in elements.
        from_size: usize,
        /// Size of the type we attempted to apply the value to, in elements.
        to_size: usize,
    },

    #[error("variant with name `{variant_name}` does not exist on enum `{enum_name}`")]
    /// The enum we tried to apply to didn't contain a variant with the give name.
    UnknownVariant {
        /// Name of the enum.
        enum_name: Box<str>,
        /// Name of the missing variant.
        variant_name: Box<str>,
    },

    #[error(transparent)]
    /// A value could not be converted to its dynamic representation via
    /// [`PartialReflect::to_dynamic`] while applying it.
    CloneError(#[from] ReflectCloneError),
}

impl From<ReflectKindMismatchError> for ApplyError {
    fn from(value: ReflectKindMismatchError) -> Self {
        Self::MismatchedKinds {
            from_kind: value.received,

View on GitHub (pinned to 396ca72708)

Solutions

1. Use a variant name that exists on the enum
2. Add the missing variant to the enum definition
3. Fix typos in the variant name

When it happens

Trigger: Thrown at crates/bevy_reflect/src/reflect.rs:61 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/dbf60d03a248b618. Report an issue: GitHub.