CoreData: error: Serious application error. Exception was caught during Core Data change processing

Question

I am running into major issues developing my iphone app.

here is the full error:

CoreData: error: Serious application error.  Exception was caught during Core Data 
change processing.  This is usually a bug within an observer of 
NSManagedObjectContextObjectsDidChangeNotification.  -[TimeSpentStudying coordinate]:
unrecognized selector sent to instance 0x21db92d0 with userInfo (null)

This is weird because I have two coreData entities ( Locations & TimeSpentStudying). But I dont think those are the problems. [TimeSpentStudying coordinate] is weird, because I do not have a coordinate property sent on TimeSpentStudying core data class

I have a mapView set up, and when a user taps on the detail disclosure button on an mkannotationview, a new view (LibraryTrackTimeViewController) pops up, but is pretty much unusable. I tried calling NSLog in viewDidLoad and nothing showed up.

mapViewController.m

#pragma mark - NSNotification

- (void)contextDidChange:(NSNotification *)notification
{
  if ([self isViewLoaded]) {
    [self updateLocations];
}

.

- (void)updateLocations
{
NSEntityDescription *entity = [NSEntityDescription entityForName:@"Location" inManagedObjectContext:self.managedObjectContext];

NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
[fetchRequest setEntity:entity];

NSError *error;
NSArray * foundObjects = [self.managedObjectContext executeFetchRequest:fetchRequest error:&error];
    if (foundObjects == nil) {
    FATAL_CORE_DATA_ERROR(error);
    return;
    }

    if (locations != nil) {
    [self.mapView removeAnnotations:locations];
    }

locations = foundObjects;
[self.mapView addAnnotations:locations];

}

-(void)dealloc
{
[[NSNotificationCenter defaultCenter] removeObserver:self
    name:NSManagedObjectContextObjectsDidChangeNotification
    object:self.managedObjectContext];
}

the error I think might have to do with the prepareForSegue method in mapViewController.m

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
  if (distance < 500) {
  if ([segue.identifier isEqualToString:@"TrackLibraryTimes"]) {
    UINavigationController *navigationController = segue.destinationViewController;

LibraryTrackTimeViewController *controller = (LibraryTrackTimeViewController *)navigationController.topViewController;
controller.managedObjectContext = self.managedObjectContext;
  }
 }}

I apologize for the rough syntax, I am just getting used to SO, if you need any more code, please let me know, thanks all.

Answer 1

I had same error, due to

-(void)controller:(NSFetchedResultsController *)controller didChangeObject:(id)anObject atIndexPath:(NSIndexPath *)indexPath forChangeType:(NSFetchedResultsChangeType)type newIndexPath:(NSIndexPath *)newIndexPath

case NSFetchedResultsChangeInsert:
            //[self.tableView insert
            NSLog(@"change insert");
            [self.tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:newIndexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
            break;

I had used indexPath instead of newIndexPath.