---
title: NSMigrationError
framework: coredata
role: symbol
role_heading: Global Variable
path: coredata/nsmigrationerror
---

# NSMigrationError

Error code to denote a general migration error.

## Declaration

```swift
var NSMigrationError: Int { get }
```

## See Also

### Error codes

- [NSCoreDataError](coredata/nscoredataerror.md)
- [NSEntityMigrationPolicyError](coredata/nsentitymigrationpolicyerror.md)
- [NSExternalRecordImportError](coredata/nsexternalrecordimporterror.md)
- [NSInferredMappingModelError](coredata/nsinferredmappingmodelerror.md)
- [NSManagedObjectConstraintMergeError](coredata/nsmanagedobjectconstraintmergeerror.md)
- [NSManagedObjectConstraintValidationError](coredata/nsmanagedobjectconstraintvalidationerror.md)
- [NSManagedObjectContextLockingError](coredata/nsmanagedobjectcontextlockingerror.md)
- [NSManagedObjectExternalRelationshipError](coredata/nsmanagedobjectexternalrelationshiperror.md)
- [NSManagedObjectMergeError](coredata/nsmanagedobjectmergeerror.md)
- [NSManagedObjectModelReferenceNotFoundError](coredata/nsmanagedobjectmodelreferencenotfounderror.md)
- [NSManagedObjectReferentialIntegrityError](coredata/nsmanagedobjectreferentialintegrityerror.md)
- [NSManagedObjectValidationError](coredata/nsmanagedobjectvalidationerror.md)
- [NSMigrationCancelledError](coredata/nsmigrationcancellederror.md)
- [NSMigrationConstraintViolationError](coredata/nsmigrationconstraintviolationerror.md)
- [NSMigrationManagerDestinationStoreError](coredata/nsmigrationmanagerdestinationstoreerror.md)