---
title: kCMMetadataDataTypeRegistryError_RequiredParameterMissing
framework: coremedia
role: symbol
role_heading: Global Variable
path: coremedia/kcmmetadatadatatyperegistryerror_requiredparametermissing
---

# kCMMetadataDataTypeRegistryError_RequiredParameterMissing

An error that indicates a parameter the function requires is empty.

## Declaration

```swift
var kCMMetadataDataTypeRegistryError_RequiredParameterMissing: OSStatus { get }
```

## See Also

### Constants

- [kCMMetadataDataTypeRegistryError_AllocationFailed](coremedia/kcmmetadatadatatyperegistryerror_allocationfailed.md)
- [kCMMetadataDataTypeRegistryError_BadDataTypeIdentifier](coremedia/kcmmetadatadatatyperegistryerror_baddatatypeidentifier.md)
- [kCMMetadataDataTypeRegistryError_DataTypeAlreadyRegistered](coremedia/kcmmetadatadatatyperegistryerror_datatypealreadyregistered.md)
- [kCMMetadataDataTypeRegistryError_MultipleConformingBaseTypes](coremedia/kcmmetadatadatatyperegistryerror_multipleconformingbasetypes.md)
- [kCMMetadataDataTypeRegistryError_RequiresConformingBaseType](coremedia/kcmmetadatadatatyperegistryerror_requiresconformingbasetype.md)