Unable to get a resource of type

Error message

Unable to get a resource of type {} from {uuid} UUID! Its actual data has some other data type with type UUID {type_uuid}!

What it means

ResourceManager::find_uuid<T>(uuid) looks up a resource by UUID and asserts the loaded data type matches T via type UUID. If the resource is loaded and its actual data type UUID differs from T's, the call panics rather than returning a wrongly-typed handle.

Solutions

Use the correct type parameter for the UUID's actual resource type (check the reported type_uuid in the message).
Fix the stale UUID reference in the scene/file so it points at the intended resource of type T.
Look the resource up untyped via find_uuid without a type assertion, then inspect its type at runtime.
Re-export/replace the asset so its UUID maps to a resource of the expected type.

Example fix

// before
let sound = rm.find_uuid::<SoundBuffer>(uuid)?; // uuid belongs to a Texture
// after
let texture = rm.find_uuid::<Texture>(uuid)?;

Defensive patterns

Strategy: validation

Validate before calling

let untyped = resource_manager.state().find_uuid(uuid);
if untyped.type_uuid_non_blocking() == Some(Texture::type_uuid()) {
    let tex: Texture = resource_manager.find_uuid(uuid).unwrap();
}

Try / catch

// check type via untyped handle before typed lookup
let untyped = resource_manager.state().find_uuid(uuid);
match untyped.type_uuid_non_blocking() {
    Some(t) if t == Texture::type_uuid() => { /* proceed */ }
    other => eprintln!("wrong type: {other:?}"),
}

Prevention

Store (uuid, type) pairs in saved data, not bare UUIDs.
Re-validate scene asset references after replacing assets.
Use constants/registry for UUIDs to avoid copy-paste mixups.
Verify reported type_uuid in panic messages when fixing references.

When it happens

Trigger: Calling find_uuid::<T>(uuid) where the UUID identifies a resource loaded as a different type (type_uuid_non_blocking() != T's type UUID).

Common situations: UUIDs reused across different asset kinds (scene referencing a sound UUID as a texture); stale saved scenes after an asset was replaced by a different type; copy-pasted UUID constants.

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

AI-assisted analysis of FyroxEngine/Fyrox@76c91aad8e (2026-09-10). Data as JSON: /api/errors/480147624aa61caa. Report an issue: GitHub.

Appendix: source

Thrown at fyrox-resource/src/manager.rs:543

    /// If the resource is not already loading, then it will be returned in
    /// the [`ResourceState::Unloaded`] state, and [`Self::request_resource`] may
    /// be used to begin the loading process.
    ///
    /// ## Panic
    ///
    /// This method will panic if type UUID of `T` does not match the actual type UUID of the resource. If this
    /// is undesirable, use [`Self::try_find`] instead.
    pub fn find_uuid<T>(&self, uuid: Uuid) -> Resource<T>
    where
        T: TypedResourceData,
    {
        let mut state = self.state();

        let untyped = state.find_uuid(uuid);

        if let Some(type_uuid) = untyped.type_uuid_non_blocking() {
            if type_uuid != <T as Reflect>::type_info().type_uuid {
                panic!(
                    "Unable to get a resource of type {} from {uuid} UUID! Its actual data has some other \
                    data type with type UUID {type_uuid}!",
                    <T as Reflect>::type_info().type_uuid,
                )
            }
        }

        Resource {
            untyped,
            phantom: PhantomData::<T>,
        }
    }

    /// Requests a resource of the given type located at the given path. This method is non-blocking, instead
    /// it immediately returns the typed resource wrapper. Loading of the resource is managed automatically in
    /// a separate thread (or thread pool) on PC, and JS micro-task (the same thread) on WebAssembly.
    ///
    /// ## Type Guarantees

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