Is there anything wrong with my codes?
<p>One of my app worked and crashed at thread0, step 35, mem address 0x00002c60 </p>

<pre><code>35  MyAppName                           0x00002c60 0x1000 + 7264
</code></pre>

<p>So I called command atos to locate the crash point as below:</p>

<pre><code>atos -arch armv6 -o MyAppName.app/MyAppName 0x00002c60
</code></pre>

<p>it returns</p>

<pre><code>-[AppDelegate setGPictureArray1:] (in MyAppName) (AppDelegate.m:9)
</code></pre>

<p>I show all codes before the line</p>

<pre><code>//AppDelegate.h
#import &lt;UIKit/UIKit.h&gt;
#import "RootViewController.h"
@class RootViewController;
@interface AppDelegate : NSObject &lt;UIApplicationDelegate&gt; {
    UIWindow *window;
    IBOutlet RootViewController *rootViewController;
    NSMutableArray * gPictureArray1; 
    NSMutableArray * gPictureArray2; 

}

@property (nonatomic, retain) NSMutableArray * gPictureArray1;
@property (nonatomic, retain) NSMutableArray * gPictureArray2;
@property (nonatomic, retain) IBOutlet UIWindow *window;
@property (nonatomic, retain) RootViewController *rootViewController;
@end

 //AppDelegate.m

#import "AppDelegate.h"
#import "RootViewController.h"
@implementation AppDelegate

@synthesize window;
@synthesize rootViewController;
@synthesize gPictureArray1;//**it looks like the crash happens here**
@synthesize gPictureArray2;
</code></pre>

<p>I can find there is any problem.
Welcome any comment.</p>
