ownership of string within custom class

[natronp]

i have a custom class which is really just a data storage object.

For now it contains only a single NSString which i had set up as a property and released in my dealloc;

i'm using NSKeyedArchiver to store an instance of the object but getting the 'Bad Access' error:

*** -[LyUser nickname]: message sent to deallocated instance 0x75174f0

when i push another view controller. I've found that by commenting out the release on that string within my data storage objects dealloc, that it stops the error.

Should i not be releasing the string property in the dealloc? I thought because it was created with (nonatomic, retain) that I should release it...

here's the code i'm using that archives the object:

-(void)saveNickLocal
{
	LyUser *lyU = [[LyUser alloc]init];
	[self setNewUser:lyU];
	[lyU release];
	lyU=nil;
	
	[[self newUser] setNickname:[self userNick] ];
	
	NSString *archivePath = [NSTemporaryDirectory() stringByAppendingPathComponent:@"User.archive"];
	BOOL *result = [NSKeyedArchiver archiveRootObject:[self newUser]
										 toFile:archivePath];
}

and then in another view controller later, i have this:

//temp test
	LyUser *usr= [[LyUser alloc]init];
	[self setUser:usr];
	[usr release];
	usr=nil;
	
	
	NSString *archivePath = [NSTemporaryDirectory() stringByAppendingPathComponent:@"User.archive"];
	self.user = [NSKeyedUnarchiver unarchiveObjectWithFile:archivePath];
	
	
	NSLog(@"user nick: %@", self.user.nickname);
	
	[[self navigationItem] setTitle:[[self user] nickname]];

does anyone spot something i'm doing that wouldn't jive with me deallocating the string within my LyUser object's dealloc?

I can't seem to get a handle on what the issue would be...