title: Receiving EXC_BAD_ACCESS message with the following code
body: <p>I am new to Objective C, so I'm not really even sure what this message means:</p>
  
  <blockquote>
    <p>EXC_BAD_ACCESS</p>
  </blockquote>
  
  <p>When executing the following code:</p>
  
  <pre><code>-(void)HelloWorld
  {
      NSURL *url = [NSURL URLWithString:@"http://example.com/service.asmx/HelloWorld"];
      NSMutableURLRequest *request =[NSMutableURLRequest requestWithURL: url];
  
      //do post request for parameter passing 
      [request setHTTPMethod:@"POST"];
  
      //set the content type to JSON
      [request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
  
      NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
      [connection release];
      [request release];
  }
  
  - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data 
  {
      // Store incoming data into a string
      NSString *jsonString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
  }
  </code></pre>
  
  <p>I'm attempting to integrate with the Json Framework. </p>
  
  <p>I call HelloWorld, which executes an async request to my service.  What's strange, is that it worked one time, and now I get this EXC_BAD_ACCESS message every subsequent time.  Any ideas what would be causing this?</p>