In the end, I threw away the mapping model file and created another one from 
scratch. That one worked.

Xcode is so incredibly buggy.

> On Feb 28, 2015, at 11:25 , Jerry Krinock <je...@ieee.org> wrote:
> 
> 
>> On 2015 Feb 27, at 20:10, Rick Mann <rm...@latencyzero.com> wrote:
>> 
>> *** Terminating app due to uncaught exception ‘NSInvalidArgumentException' …
>> Any ideas?
> 
> Maybe add a symbolic breakpoint at ‘NSInvalidArgumentException’, and when it 
> breaks, poke around.  Or do a heavyweight migration; at least then it should 
> break in your code so you won’t be frustrated by “Couldn’t materialize 
> struct” errors when poking into registers.
> 
> I don’t know whether or not that particular breakpoint is included in “All 
> Objective-C Exceptions”.  It’s not really “Objective”.  Also, I never know 
> whether or not to prefix an underscore, as in _NSInvalidArgumentException.  
> I’ve got some similar working breakpoints with the underscore and some 
> without.
> 
> 
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-- 
Rick Mann
rm...@latencyzero.com



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