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  "title" : "Sessions API Result Codes"
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# Sessions API Result Codes

Recognize result codes specific to the sessions API.

## Discussion

Use the [`SecCopyErrorMessageString(_:_:)`](/documentation/Security/SecCopyErrorMessageString(_:_:)) function to obtain a human readable string corresponding to these status codes.

The functions of the sessions API may also return result codes from the authorization services API listed in [Authorization Services Result Codes](/documentation/Security/authorization-services-result-codes) or the general codes listed in [Security Framework Result Codes](/documentation/Security/security-framework-result-codes).

## Topics

### Codes

[`var errSessionSuccess: OSStatus`](/documentation/Security/errSessionSuccess)

The operation completed successfully.

[`var errSessionInvalidId: OSStatus`](/documentation/Security/errSessionInvalidId)

Detected an invalid session ID.

[`var errSessionInvalidAttributes: OSStatus`](/documentation/Security/errSessionInvalidAttributes)

Detected an invalid set of request attribute bits.

[`var errSessionAuthorizationDenied: OSStatus`](/documentation/Security/errSessionAuthorizationDenied)

Authorization denied.

[`var errSessionValueNotSet: OSStatus`](/documentation/Security/errSessionValueNotSet)

The requested session attribute has not been set.

[`var errSessionInternal: OSStatus`](/documentation/Security/errSessionInternal)

An unrecognized internal error occurred.

[`var errSessionInvalidFlags: OSStatus`](/documentation/Security/errSessionInvalidFlags)

Encountered invalid flags or options.


---

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