---
title: Exception Global String Constants
framework: Exception Handling
role: collectionGroup
role_heading: API Collection
path: exceptionhandling/exception-global-string-constants
---

# Exception Global String Constants

Two of the following global string constants identify exceptions generated by the framework for Objective-C runtime errors and system exceptions such as invalid memory accesses. The other constant is used as a key to access the stack trace in the userInfo dictionary of an NSException object, when requested.

## Topics

### Constants

- [NSUncaughtSystemExceptionException](exceptionhandling/nsuncaughtsystemexceptionexception.md)
- [NSUncaughtRuntimeErrorException](exceptionhandling/nsuncaughtruntimeerrorexception.md)
- [NSStackTraceKey](exceptionhandling/nsstacktracekey.md)

## See Also

### Constants

- [Logging and Handling Constants](exceptionhandling/logging-and-handling-constants.md)
- [System Hang Constants](exceptionhandling/system-hang-constants.md)