# Error Constants Error code constants for framework operations. ## Topics ### Constants [`static var accessRestricted: PHPhotosError.Code`](/documentation/Photos/PHPhotosError-swift.struct/accessRestricted) An error that indicates the system configuration restricts access to the asset. [`static var accessUserDenied: PHPhotosError.Code`](/documentation/Photos/PHPhotosError-swift.struct/accessUserDenied) An error that indicates the user denied access. [`static var changeNotSupported: PHPhotosError.Code`](/documentation/Photos/PHPhotosError-swift.struct/changeNotSupported) An error that indicates the system doesn’t support the change request configuration. [`static var identifierNotFound: PHPhotosError.Code`](/documentation/Photos/PHPhotosError-swift.struct/identifierNotFound) An error that indicates an identifier doesn’t exist. [`static var internalError: PHPhotosError.Code`](/documentation/Photos/PHPhotosError-swift.struct/internalError) An error that indicates an internal error occurs. [`static var invalidResource: PHPhotosError.Code`](/documentation/Photos/PHPhotosError-swift.struct/invalidResource) An error that indicates the asset resource validation failed. [`static var libraryVolumeOffline: PHPhotosError.Code`](/documentation/Photos/PHPhotosError-swift.struct/libraryVolumeOffline) An error that indicates the photo library isn’t available because the file system volume that stores it isn’t mounted. [`static var libraryInFileProviderSyncRoot: PHPhotosError.Code`](/documentation/Photos/PHPhotosError-swift.struct/libraryInFileProviderSyncRoot) An error that indicates the Photos library bundle is in a file provider sync directory, and the framework doesn’t support it. [`static var limitExceeded: PHPhotosError.Code`](/documentation/Photos/PHPhotosError-swift.struct/limitExceeded) An error that indicates the request exceeds a limit. [`static var missingResource: PHPhotosError.Code`](/documentation/Photos/PHPhotosError-swift.struct/missingResource) An error that indicates a missing asset resource. [`static var multipleIdentifiersFound: PHPhotosError.Code`](/documentation/Photos/PHPhotosError-swift.struct/multipleIdentifiersFound) An error that indicates that more than one identifier exists. [`static var networkAccessRequired: PHPhotosError.Code`](/documentation/Photos/PHPhotosError-swift.struct/networkAccessRequired) An error that indicates the request for an asset resource failed because it requires network access. [`static var networkError: PHPhotosError.Code`](/documentation/Photos/PHPhotosError-swift.struct/networkError) An error that indicates the request for an asset resource fails because of a network connection error. [`static var notEnoughSpace: PHPhotosError.Code`](/documentation/Photos/PHPhotosError-swift.struct/notEnoughSpace) An error that indicates insufficient space to perform the change. [`static var operationInterrupted: PHPhotosError.Code`](/documentation/Photos/PHPhotosError-swift.struct/operationInterrupted) An error that indicates an interruption occurs and the operation can’t complete. [`static var persistentChangeDetailsUnavailable: PHPhotosError.Code`](/documentation/Photos/PHPhotosError-swift.struct/persistentChangeDetailsUnavailable) An error that indicates the change details aren’t available for the persistent change. [`static var persistentChangeTokenExpired: PHPhotosError.Code`](/documentation/Photos/PHPhotosError-swift.struct/persistentChangeTokenExpired) An error that indicates the library state is older than the available history of persistent changes. [`static var relinquishingLibraryBundleToWriter: PHPhotosError.Code`](/documentation/Photos/PHPhotosError-swift.struct/relinquishingLibraryBundleToWriter) An error that indicates the photo library isn’t available because the user moves, renames, or deletes the system’s photo library. [`static var requestNotSupportedForAsset: PHPhotosError.Code`](/documentation/Photos/PHPhotosError-swift.struct/requestNotSupportedForAsset) An error that indicates the system doesn’t support the request for the asset. [`static var switchingSystemPhotoLibrary: PHPhotosError.Code`](/documentation/Photos/PHPhotosError-swift.struct/switchingSystemPhotoLibrary) An error that indicates the photo library isn’t available because the user switched the system’s photo library. [`static var userCancelled: PHPhotosError.Code`](/documentation/Photos/PHPhotosError-swift.struct/userCancelled) An error that indicates the user cancels the asset retrieval or editing request. [`static var invalid: PHPhotosError.Code`](/documentation/Photos/PHPhotosError-swift.struct/Code/invalid) An error that indicates the operation isn’t valid. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)