# Status and Error Codes The status or error code generated by the most recent System Configuration function call. ## Topics ### Constants [`var kSCStatusOK: Int`](/documentation/SystemConfiguration/kSCStatusOK) The call was successful. [`var kSCStatusFailed: Int`](/documentation/SystemConfiguration/kSCStatusFailed) A nonspecific failure occurred. [`var kSCStatusInvalidArgument: Int`](/documentation/SystemConfiguration/kSCStatusInvalidArgument) An invalid argument was specified. [`var kSCStatusAccessError: Int`](/documentation/SystemConfiguration/kSCStatusAccessError) Permission is denied; you must be root to obtain a lock. As a result, the function could not create or access preferences. [`var kSCStatusNoKey: Int`](/documentation/SystemConfiguration/kSCStatusNoKey) No such key. [`var kSCStatusKeyExists: Int`](/documentation/SystemConfiguration/kSCStatusKeyExists) [`var kSCStatusLocked: Int`](/documentation/SystemConfiguration/kSCStatusLocked) A lock is already held. [`var kSCStatusNeedLock: Int`](/documentation/SystemConfiguration/kSCStatusNeedLock) A lock is required for this operation. [`var kSCStatusNoStoreSession: Int`](/documentation/SystemConfiguration/kSCStatusNoStoreSession) The configuration daemon session is not active. [`var kSCStatusNoStoreServer: Int`](/documentation/SystemConfiguration/kSCStatusNoStoreServer) The configuration daemon is not available or no longer available. [`var kSCStatusNotifierActive: Int`](/documentation/SystemConfiguration/kSCStatusNotifierActive) Notifier is currently active. [`var kSCStatusNoPrefsSession: Int`](/documentation/SystemConfiguration/kSCStatusNoPrefsSession) The preferences session is not active. [`var kSCStatusPrefsBusy: Int`](/documentation/SystemConfiguration/kSCStatusPrefsBusy) A preferences update is currently in progress. [`var kSCStatusNoConfigFile: Int`](/documentation/SystemConfiguration/kSCStatusNoConfigFile) The configuration file cannot be found. [`var kSCStatusNoLink: Int`](/documentation/SystemConfiguration/kSCStatusNoLink) No such link exists. [`var kSCStatusStale: Int`](/documentation/SystemConfiguration/kSCStatusStale) A write was attempted on a stale version of the object. [`var kSCStatusMaxLink: Int`](/documentation/SystemConfiguration/kSCStatusMaxLink) The maximum link count is exceeded. [`var kSCStatusReachabilityUnknown: Int`](/documentation/SystemConfiguration/kSCStatusReachabilityUnknown) Network reachability cannot be determined. [`var kSCStatusConnectionNoService: Int`](/documentation/SystemConfiguration/kSCStatusConnectionNoService) Network service for the connection is not available. [`var kSCStatusConnectionIgnore: Int`](/documentation/SystemConfiguration/kSCStatusConnectionIgnore) Network connection information is not available at this time. --- Copyright © 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)