# Scene File Consistency Check Error Codes Error codes that identify errors found during a scene-file-format consistency check. ## Discussion If you specify for the [`checkConsistency`](/documentation/SceneKit/SCNSceneSource/LoadingOption/checkConsistency) when creating or loading from a scene source, SceneKit verifies the scene file against the specification for its file format. SceneKit reports any format verification issues in an object whose property is one of these values. For more details about the location and nature of any format validation errors, see the [`SCNDetailedErrorsKey`](/documentation/SceneKit/SCNDetailedErrorsKey) key in the error’s dictionary, and the keys listed in [Scene File Consistency Error Keys](/documentation/SceneKit/scene-file-consistency-error-keys). ## Topics ### Constants [`var SCNConsistencyInvalidURIError: Int`](/documentation/SceneKit/SCNConsistencyInvalidURIError) The scene file contains an invalid URI (or URL). [`var SCNConsistencyInvalidCountError: Int`](/documentation/SceneKit/SCNConsistencyInvalidCountError) The scene file contains an invalid number of scenes. [`var SCNConsistencyInvalidArgumentError: Int`](/documentation/SceneKit/SCNConsistencyInvalidArgumentError) An element in the scene file contains an invalid option for one of its attributes. [`var SCNConsistencyMissingElementError: Int`](/documentation/SceneKit/SCNConsistencyMissingElementError) A required element in the scene file is missing. [`var SCNConsistencyMissingAttributeError: Int`](/documentation/SceneKit/SCNConsistencyMissingAttributeError) An element in the scene file is missing a required attribute. [`var SCNConsistencyXMLSchemaValidationError: Int`](/documentation/SceneKit/SCNConsistencyXMLSchemaValidationError) The format of the scene file does not match its XML schema definition. --- 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)