Hi, I used NSMutableArray and added 6 objects to the array,when I run the App on the iphone/simulator the app crashes. When I delete one object from the array ,the app keep running smoothly. How can I add more than 5 objects to an NSMutableArray ,or should I use another type of array? one more question,I defined 3 NSMutableArray ,and defined them in the memmory Code: FirstLine = [[NSMutableArray alloc] init]; SecondLine = [[NSMutableArray alloc] init]; ThirdLine = [[NSMutableArray alloc] init]; the app crashes after I run it,what is the problem? Thank you.