Thanks for the tips Quincey and Nick. I'll keep an eye out for the use of 
NSNotFound.

~Phil

On Jul 19, 2011, at 2:46 PM, Quincey Morris wrote:

> On Jul 19, 2011, at 12:32, Nick Zitzmann wrote:
> 
>> The only problem I ever had with unarchiving 32-bit app archives in a 64-bit 
>> app was with longs in non-keyed archives that were encoded using 
>> @encode(long)*, and that doesn't apply to your scenario.
> 
> The other issue that might rear its head is that the meaning of NSNotFound 
> changes between 32- and 64-bit runtimes**, which makes a mess of archives 
> that use it. The answer, of course, is to keep NSNotFound out of archives, 
> but (as I found to my own cost) if existing code archives NSNotFound, it's 
> really, really hard to clean the mess up.
> 
> 
> 
> ** I mean: if you archive NSNotFound in a 32-bit application, it's no longer 
> NSNotFound when you unarchive it in a 64-bit application. And vice versa, 
> probably.
> 
> 

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