>> 
> 
> This strongly suggests a memory management problem -- something is 
> over-releasing the items in the array.
> 

okay, this is what I figured, but I can't see anywhere where this could be 
happening. 


> On May 1, 2010, at 21:22, James Maxwell wrote:
> 
>> If I drop into the debugger arbitrarily, before the crash, and check this 
>> same array, I noticed that it is nicely filled with NSCFNumbers. But, 
>> strangely, there are too many.
> 
> My guess is that you've still got multiple threads accessing the mutable 
> array simultaneously, and that's not thread-safe if one of the accesses is 
> changing the array.

Well, there's only one object that "changes" the array, so I don't know how 
this could happen.

I would like to know, though, whether this:

        for(i=numLevels - 1;i >= 0;--i)                                 // run 
back down the network
        {
                NSMutableArray* level = [[[self network] hierarchy] 
objectAtIndex:i];
                dispatch_apply([level count],
                                           hsmm_queue, 
                                           ^(size_t index) {
                                                   HSMM_Node* aNode;
                                                   aNode = [level 
objectAtIndex:index];
                                                   [aNode 
getEvidenceFromParents];
                                                   [aNode topDown:[aNode 
parentEvidence]];
                                                   if([aNode nodeLevel] == 1)
                                                           [[aNode sequencer] 
predictForward:NO];
                                           });
        }

will process all of the "aNode" objects on the current "level", before moving 
on to the next "level"? 
My intention with the above code is to process each level in parallel, but to 
finish processing a level before moving to the next level. If this is not the 
proper way to do that, I'd really appreciate any help in correcting this code.

thanks,

J.

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