On Mar 19, 2010, at 10:58 AM, Michael Davey wrote:

> I have just encountered the following error at (seemingly) random intervals 
> when trying to debug my iPhone application, and I was wondering what causes 
> it and how I might go about hunting it down so that I can try and fix it?
> 
> objc[22029]: FREED(id): message release sent to freed object=0x3b45c20
> Program received signal:  “EXC_BAD_INSTRUCTION”.

Run your app with Instruments with the object alloc tool, and turn on reference 
counting and zombies. And hope your app doesn't run out of memory before 
catching the double-free.

Nick Zitzmann
<http://www.chronosnet.com/>

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