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How to debug this error on closing a document?
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How to debug this error on closing a document?


  • Subject: How to debug this error on closing a document?
  • From: Gideon King <email@hidden>
  • Date: Thu, 11 Mar 2010 10:45:21 +1000

I have a core data based application, and use the NSPersistentDocument's -managedObjectContext to get my managed object context. As far as I can see, I do not retain or release it anywhere in my code, but apparently it is getting over released when I close my document. My test case is to start my application, and then close the document.

I ran it in instruments with zombies, and it only shows two events:

#	Category	Event Type	RefCt	Timestamp	Address	Size	Responsible Library	Responsible Caller
0	NSManagedObjectContext	Malloc	1	00:12.552	0x1008d01f0	240	AppKit	-[NSPersistentDocument managedObjectContext]
1	NSManagedObjectContext	Zombie	-1	00:26.194	0x1008d01f0	0	Foundation	-[NSConcreteNotification dealloc]

Seeing as none of this appears to have anything to do with my code, I am assuming that some notification created somewhere in my application is somehow the cause, but I'm not sure how to track this down.

Any suggestions would be very welcome.


Thanks

Gideon



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