<!--
{
  "availability" : [
    "iOS: -",
    "iPadOS: -",
    "macCatalyst: -",
    "macOS: -",
    "tvOS: -",
    "visionOS: -",
    "watchOS: -"
  ],
  "documentType" : "symbol",
  "framework" : "CoreData",
  "identifier" : "/documentation/CoreData/NSValidationMissingMandatoryPropertyError",
  "metadataVersion" : "0.1.0",
  "role" : "Global Variable",
  "symbol" : {
    "kind" : "Global Variable",
    "modules" : [
      "Core Data"
    ],
    "preciseIdentifier" : "c:@Ea@NSManagedObjectValidationError@NSValidationMissingMandatoryPropertyError"
  },
  "title" : "NSValidationMissingMandatoryPropertyError"
}
-->

# NSValidationMissingMandatoryPropertyError

Error code for a non-optional property with a nil value.

```
var NSValidationMissingMandatoryPropertyError: Int { get }
```

---

Copyright &copy; 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)