---
title: NFCISO15693TagResponseErrorKey
framework: corenfc
role: symbol
role_heading: Global Variable
path: corenfc/nfciso15693tagresponseerrorkey
---

# NFCISO15693TagResponseErrorKey

A user information dictionary key indicating that a tag responded with a command error.

## Declaration

```swift
let NFCISO15693TagResponseErrorKey: String
```

## Discussion

Discussion Check for the presence of this key in the userInfo dictionary of an NSError object to determine whether a tag responded with a command error. When a command error occurs, the code property contains an error code defined in the ISO15693-3 specification.