Question

Can any one help me to understand the problem in this image

Answer 1

As the analyzer says, you are allocating locs on line 647, using
NSMutableArray *locs = [[NSMutableArray alloc] init]; and not releasing it later in the block. You should release it or you can use convenience constructor to get the autoreleased array like this, NSMutableArray *locs = [NSMutableArray array];

I’d suggest you to still simplify your code to this,

NSMutableArray *annotations = (NSMutableArray *)[map annotations];
[annotations removeObject:[map userLocation]];
[map removeAnnotations:annotations];