---
title: MTLCommandBufferError.Code.blacklisted
framework: metal
role: symbol
role_heading: Case
path: metal/mtlcommandbuffererror-swift.struct/code/blacklisted
---

# MTLCommandBufferError.Code.blacklisted

A former error code that indicates the system has revoked the Metal device’s access because it’s responsible for too many timeouts or hangs.

## Declaration

```swift
case blacklisted
```