Xcode Program received signal: “EXC_BAD_ACCESS”

Program received signal: “EXC_BAD_ACCESS”

This error occurs in device not simulator.

Possible Errors:

• access protected or non-existent memory space as result of a bad pointer
• access memory without alloc init
• access memory after released object
• remove the [object release] only if you don’t use alloc/copy/retain
• trying to access release objects
• illegal memory access

DebuggingAutorelease

http://www.cocoadev.com/index.pl?DebuggingAutorelease
This show you how to use Cocoa’s NSZombie debugging class and the command line “malloc_history” tool to find exactly what released object has been accessed in you code.
Running Instruments and checking for leaks will not help troubleshoot EXEC_BAD_ACCESS.

Debugging Techniques
http://www.cocoadev.com/index.pl?DebuggingTechniques

NSAssert() call to validate method parameters is to track and avoid passing nils set a breakpoint on objc_exception_throw.