EXC_BAD_ACCESS issue on iphone and simulator

I am getting an EXC_BAD_ACCESS out side of my own code. Currently my code gets a URL through a shareURLCache object and then starts url connection. Once I leave the method that starts the url connection I hit the EXC_BAD_ACCESS. I have tried using instruments to find any zombies and I have analysed for memory leaks and not turned up either. At this point I am completely stuck.

Here is the code that loads the url and starts the url connection

- (void)locationManager:(CLLocationManager *)manager 
didUpdateToLocation:(CLLocation *)newLocation 
       fromLocation:(CLLocation *)oldLocation
{
    NSLog(@"At new location: %@",newLocation);

    MKCoordinateRegion region = 
            MKCoordinateRegionMakeWithDistance([newLocation coordinate], 750, 750);

    [mapView setRegion:region animated:YES];
    [location stopUpdatingLocation];

    CLLocationCoordinate2D coord = [newLocation coordinate];
    NSURL *url = [urlCache getReccomendationForUID:@"12345" atLat:coord.latitude 
                                         atLon:coord.longitude forCategories:nil];


    // Create the request.
    NSURLRequest *request = [NSURLRequest requestWithURL:url
                                         cachePolicy:NSURLRequestUseProtocolCachePolicy
                     开发者_StackOverflow                timeoutInterval:60.0];


// create the connection with the request
// and start loading the data
    connection = [[NSURLConnection alloc] initWithRequest:request delegate:self startImmediately:YES];
    if (connection) {
        // Create the NSMutableData to hold the received data.
        // xmlData is an instance variable declared elsewhere.
        xmlData = [[NSMutableData alloc]init];
    } else {
        NSLog(@"Could not create connection");
    }
}

Method from the sharedURLCache that returns the url

-(NSURL *)getReccomendationForUID:(NSString *)u atLat:(double)lat atLon:(double)lon forCategories:(NSArray *)cat
{
    if(remote) {
        NSMutableString *categories = [[NSMutableString alloc]init];
        for(NSString *s in cat) {
            [categories appendString:@"&cat="];
            [categories appendString:s];
        }
        NSString *s = [NSString stringWithFormat:@"%@/recommendation?uid=%@&psw=null&lat=%f&lon=%f?%@",
                   apiRoot,u,lat,lon,categories];
        [categories release];
        return [NSURL URLWithString:s];
    } else {
        return [[NSBundle mainBundle] URLForResource:@"XMLTest" withExtension:@"xml"];;
    }
}

---

Just start by commenting out code and running to see if you can get the mem error to disappear then start adding code again until it appears, then you have a better idea where the issue is. it could be anywhere in your code since you seem to have a number of objects in there that are not passed in e.g. 'location'.

[location stopUpdatingLocation];

---

I had same memory issue with

[mapView setRegion:region animated:YES];

This method doesn't like fast updates...