# Tweet by [@keefmoon](http://twitter.com/keefmoon) on 2010-07-12 00:51:01 > [!INFO] Archived from [original tweet](http://twitter.com/keefmoon/status/18316233454) Can any iPhone Devs help me? NSFetchResultsController - getting "message sent to dealloc instance" need to deregister on disappear but how?