Apple Error Codes Database
Comprehensive Apple Error Codes
Explore our extensive database of over 5,000 Apple Ecosystem error codes. From macOS to iOS, tvOS, watchOS, and visionOS, each code is presented with its name and a concise description to help you quickly pinpoint and resolve issues.
Whether you’re a developer refining an app or a user troubleshooting a system glitch, this resource empowers you with the knowledge to decode cryptic errors and find actionable solutions. No more guesswork—just clear guidance to keep your projects and devices running smoothly.
| Number | Name & Description | Platforms | Framework | Header |
|---|---|---|---|---|
| -1100 |
NSItemProviderUnexpectedValueClassError
Unexpected class type in item provider
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSItemProvider.h |
| -1 |
NSItemProviderUnknownError
Unknown error in NSItemProvider.
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSItemProvider.h |
| 1024 |
NSKeyValueValidationError
Key-value validation failure.
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | FoundationErrors.h |
| 1 |
NSLogUncaughtRuntimeErrorMask
Uncaught runtime error for logging.
|
macOS | ExceptionHandling | NSExceptionHandler.h |
| 133021 |
NSManagedObjectConstraintMergeError
Core Data managed object constraint merge error.
|
iOS, macOS, tvOS, visionOS, watchOS | CoreData | CoreDataErrors.h |
| 1551 |
NSManagedObjectConstraintValidationError
Managed object violates a constraint
|
iOS, macOS, tvOS, visionOS, watchOS | CoreData | CoreDataErrors.h |
| 132000 |
NSManagedObjectContextLockingError
CoreData: managed object context locking error.
|
iOS, macOS, tvOS, visionOS, watchOS | CoreData | CoreDataErrors.h |
| 133010 |
NSManagedObjectExternalRelationshipError
Error with external relationship on NSManagedObject.
|
iOS, macOS, tvOS, visionOS, watchOS | CoreData | CoreDataErrors.h |
| 133020 |
NSManagedObjectMergeError
Core Data managed object merge error.
|
iOS, macOS, tvOS, visionOS, watchOS | CoreData | CoreDataErrors.h |
| 134504 |
NSManagedObjectModelReferenceNotFoundError
Managed object model reference is missing
|
iOS, macOS, tvOS, visionOS, watchOS | CoreData | CoreDataErrors.h |
| 133000 |
NSManagedObjectReferentialIntegrityError
CoreData: managed object referential integrity error.
|
iOS, macOS, tvOS, visionOS, watchOS | CoreData | CoreDataErrors.h |
| 1550 |
NSManagedObjectValidationError
Managed object validation failed in CoreData.
|
iOS, macOS, tvOS, visionOS, watchOS | CoreData | CoreDataErrors.h |
| 1 |
NSMatchingInternalError
Internal error occurred during matching in Foundation.
|
iOS, macOS, tvOS, visionOS, watchOS | Foundation | NSRegularExpression.h |
| 134120 |
NSMigrationCancelledError
Migration was cancelled in Core Data.
|
iOS, macOS, tvOS, visionOS, watchOS | CoreData | CoreDataErrors.h |
| 134111 |
NSMigrationConstraintViolationError
CoreData migration failed due to a constraint violation.
|
iOS, macOS, tvOS, visionOS, watchOS | CoreData | CoreDataErrors.h |
| 134110 |
NSMigrationError
Data model migration failed
|
iOS, macOS, tvOS, visionOS, watchOS | CoreData | CoreDataErrors.h |
| 134160 |
NSMigrationManagerDestinationStoreError
CoreData migration manager destination store error.
|
iOS, macOS, tvOS, visionOS, watchOS | CoreData | CoreDataErrors.h |
| 134150 |
NSMigrationManagerSourceStoreError
Error in the source store used by the migration manager.
|
iOS, macOS, tvOS, visionOS, watchOS | CoreData | CoreDataErrors.h |
| 134140 |
NSMigrationMissingMappingModelError
CoreData: migration missing mapping model.
|
iOS, macOS, tvOS, visionOS, watchOS | CoreData | CoreDataErrors.h |
| 134130 |
NSMigrationMissingSourceModelError
Core Data migration missing source model.
|
iOS, macOS, tvOS, visionOS, watchOS | CoreData | CoreDataErrors.h |