---
title: Key Value Coding Exception Names
framework: objectivec
role: collectionGroup
path: objectivec/key-value-coding-exception-names
---

# Key Value Coding Exception Names

This constant defines the name of an exception raised when a key value coding operation fails.

## Topics

### Constants

- [undefinedKeyException](foundation/nsexceptionname/undefinedkeyexception.md)

## See Also

### Constants

- [NSUndefinedKeyException userInfo Keys](objectivec/nsundefinedkeyexception-userinfo-keys.md)
- [NSKeyValueValidationError](foundation/nskeyvaluevalidationerror-swift.var.md)