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# CMClock Error Codes

Constants that represent the errors in Core Media clock operations.

## Topics

### Constants

[`var kCMClockError_MissingRequiredParameter: OSStatus`](/documentation/CoreMedia/kCMClockError_MissingRequiredParameter)

A clock error that indicates a parameter is missing.

[`var kCMClockError_InvalidParameter: OSStatus`](/documentation/CoreMedia/kCMClockError_InvalidParameter)

A clock error that indicates a parameter isn’t valid.

[`var kCMClockError_AllocationFailed: OSStatus`](/documentation/CoreMedia/kCMClockError_AllocationFailed)

A clock error that indicates the memory allocation fails.

[`var kCMClockError_UnsupportedOperation: OSStatus`](/documentation/CoreMedia/kCMClockError_UnsupportedOperation)

A clock error that indicates the operation isn’t supported.


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