---
title: CSSM_ERRCODE_ACL_CHALLENGE_CALLBACK_FAILED
framework: security
role: symbol
role_heading: Global Variable
path: security/cssm_errcode_acl_challenge_callback_failed
---

# CSSM_ERRCODE_ACL_CHALLENGE_CALLBACK_FAILED

## Declaration

```swift
var CSSM_ERRCODE_ACL_CHALLENGE_CALLBACK_FAILED: Int { get }
```