---
title: CMSync error codes
framework: coremedia
role: collectionGroup
role_heading: API Collection
path: coremedia/cmsync-error-codes
---

# CMSync error codes

Constants that represent error codes Core Media sync operations return.

## Topics

### Constants

- [kCMSyncError_MissingRequiredParameter](coremedia/kcmsyncerror_missingrequiredparameter.md)
- [kCMSyncError_InvalidParameter](coremedia/kcmsyncerror_invalidparameter.md)
- [kCMSyncError_AllocationFailed](coremedia/kcmsyncerror_allocationfailed.md)
- [kCMSyncError_RateMustBeNonZero](coremedia/kcmsyncerror_ratemustbenonzero.md)

## See Also

### Constants

- [CMClock Error Codes](coremedia/cmclock-error-codes.md)
- [CMTimebase Error Codes](coremedia/cmtimebase-errors.md)
- [Timebase Notifications](coremedia/timebase-notifications.md)