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bug? NSPersistentDocument Core Data Tutorial

After reading about a bug in the NSPersistentDocument tutorial ( previously reported at: http://lists.apple.com/archives/cocoa-dev/ 2006/Apr/msg02276.html ), I would like to ask about a similar issue:

The tutorial's Adding a Department Object chapter includes a section entitled Supporting Document Revert. The code there calls the super class' version of revertToContentsOfURL:.

- (BOOL)revertToContentsOfURL:(NSURL *)inAbsoluteURL ofType:(NSString *)inTypeName error:(NSError **)outError
{
[departmentController setContent:nil];
[self setDepartment:nil];
return [super revertToContentsOfURL:inAbsoluteURL ofType:inTypeName error:outError];
}

However, while using the tutorial to learn Core Data, I found my app crashes when the super class' version of revertToContentsOfURL: is called. (Department/p1> has been invalidated. is seen in the console. ) When I simply return YES in lieu of calling the super class version, my app seems to work.

return YES; //[super revertToContentsOfURL:inAbsoluteURL ofType:inTypeName error:outError];

Is returning YES the correct procedure here?

Thank you,
Chris Outwin
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