bevyengine/bevy · error · WriteDefaultMetaError

encountered an I/O error while reading the existing meta fil

Error message

encountered an I/O error while reading the existing meta file: {0}

What it means

WriteDefaultMetaError::FailedToReadMeta — an I/O error occurred while reading the existing meta file (payload carries the underlying io/AssetReader error). Check filesystem permissions or the reader's availability.

Source

Thrown at crates/bevy_asset/src/server/mod.rs:2389

    Failed(Arc<AssetLoadError>),
    /// A dependency of the asset failed to load.
    #[error(transparent)]
    DependencyFailed(Arc<AssetLoadError>),
}

#[derive(Error, Debug)]
pub enum WriteDefaultMetaError {
    #[error(transparent)]
    MissingAssetLoader(#[from] MissingAssetLoaderForExtensionError),
    #[error(transparent)]
    MissingAssetSource(#[from] MissingAssetSourceError),
    #[error(transparent)]
    MissingAssetWriter(#[from] MissingAssetWriterError),
    #[error("failed to write default asset meta file: {0}")]
    FailedToWriteMeta(#[from] AssetWriterError),
    #[error("asset meta file already exists, so avoiding overwrite")]
    MetaAlreadyExists,
    #[error("encountered an I/O error while reading the existing meta file: {0}")]
    IoErrorFromExistingMetaCheck(Arc<std::io::Error>),
    #[error("encountered HTTP status {0} when reading the existing meta file")]
    HttpErrorFromExistingMetaCheck(u16),
}

View on GitHub (pinned to 227d3a6c66)

Solutions

  1. Check file permissions on the .meta file
  2. Delete the unreadable .meta file so it can be regenerated
  3. Inspect the wrapped I/O error for details
Defensive patterns

Strategy: try-catch

When it happens

Trigger: Thrown at crates/bevy_asset/src/server/mod.rs:2374 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of bevyengine/bevy@227d3a6c66 (2026-08-20). Data as JSON: /api/errors/cd91f2aa40df9ce7. Report an issue: GitHub.