Keep getting "This NSPersistentStoreCoordinator has no persistent stores. It cannot perform a save operation." upon closing my app (OSX)

Question

i've checked several posts on the internet and stackOverflow but couldn't find an answer so far. This is my AppDelegate, as far as I know, those implementations are pretty standard.. i just added the following line and passed the arguments, but it didn't help..

NSDictionary *options = [NSDictionary dictionaryWithObjectsAndKeys:
  [NSNumber numberWithBool:YES], NSMigratePersistentStoresAutomaticallyOption,
  [NSNumber numberWithBool:YES], NSInferMappingModelAutomaticallyOption, nil];

I cleaned my project, that didn't help either. Also the ApplicationSupport folder does not get created. Is it possible that this is the cause of the problem? I didn't create the App with the option "use core data", but I provided the the necessary methods...

-(NSPersistentStoreCoordinator *)persistentStoreCoordinator{...} is at the bottom!

Help is greatly appreciated!

#import "WebLogClientAppDelegate.h"

// create anonymous catergories for uses in this class
@interface WebLogClientAppDelegate();
@property(nonatomic, readonly) NSString *applicationSupportFolder;
@property(nonatomic, readonly) NSPersistentStoreCoordinator *persistentStoreCoordinator;
@end

@implementation WebLogClientAppDelegate
@synthesize autorPrefFeld, benutzerPrefFeld, passwortPrefFeld, hauptfenster,
managedObjectModel, managedObjectContext, autor;

- (void) applicationWillFinishLaunching:(NSNotification *)notification
{
    NSLog(@"applicationWillFinishLaunching");
    NSDictionary *defaultsDict = [NSDictionary dictionaryWithObjectsAndKeys:@"Mathias Mustermann", @"autor", 
                                  @"mathias", @"benutzer", 
                                  @"passwort",@"passwort", nil];
    [[NSUserDefaults standardUserDefaults] registerDefaults:defaultsDict];
}

- (NSApplicationTerminateReply)applicationShouldTerminate:(NSApplication *)sender
{
    [moc commitEditing];
    if ([moc hasChanges]) {
        NSLog(@"Save needed!");
        [moc save:nil];
    }
    return NSTerminateNow;
}

- (NSString *)autor{
    return [[NSUserDefaults standardUserDefaults] stringForKey:@"autor"];
}

- (void)windowDidBecomeKey:(NSNotification *)notification
{
    NSLog(@"windowDidBecomeKey");
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    [autorPrefFeld setStringValue:[defaults stringForKey:@"autor"]];
    [benutzerPrefFeld setStringValue:[defaults stringForKey:@"benutzer"]];
    [passwortPrefFeld setStringValue:[defaults stringForKey:@"passwort"]];
}

- (void)windowDidResignKey:(NSNotification *)notification
{
    NSLog(@"windowDidResignKey");
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    [defaults setObject:[autorPrefFeld stringValue] forKey:@"autor"];
    [defaults setObject:[benutzerPrefFeld stringValue] forKey:@"benutzer"];
    [defaults setObject:[passwortPrefFeld stringValue] forKey:@"passwort"];
    [defaults synchronize];    
}

- (NSManagedObjectModel *)managedObjectModel
{
    if(objectModel){
        return objectModel;
    }
    objectModel= [NSManagedObjectModel mergedModelFromBundles:nil];
    return objectModel; 
}

- (NSString *)applicationSupportFolder
{
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSApplicationSupportDirectory, NSUserDomainMask, YES);
    NSString *basePath = ([paths count] > 0) ? [paths objectAtIndex:0] : NSTemporaryDirectory();
    return [basePath stringByAppendingPathComponent:@"WeblogClient"];
}

- (NSPersistentStoreCoordinator *)persistentStoreCoordinator
{
    if (storeCoord) {
        return storeCoord;
    }

    NSFileManager *fileManager;
    NSString *applicationSupportFolder;
    NSURL *url;

    NSDictionary *options = [NSDictionary dictionaryWithObjectsAndKeys:
                             [NSNumber numberWithBool:YES], NSMigratePersistentStoresAutomaticallyOption,
                             [NSNumber numberWithBool:YES], NSInferMappingModelAutomaticallyOption, nil];

    fileManager = [NSFileManager defaultManager];
    applicationSupportFolder = self.applicationSupportFolder;
    if (![fileManager fileExistsAtPath:applicationSupportFolder]) {
        [fileManager createDirectoryAtPath:applicationSupportFolder withIntermediateDirectories:NO attributes:nil error:nil];
    }
    url = [NSURL fileURLWithPath:[applicationSupportFolder stringByAppendingPathComponent:@"WeblogClient.xml"]];
    storeCoord = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel:self.managedObjectModel];
    [storeCoord addPersistentStoreWithType:NSXMLStoreType configuration:nil URL:url options:options error:nil];
    return storeCoord;                 
}



- (NSManagedObjectContext *)managedObjectContext
{
    if (moc) {
        return moc;
    }
    NSPersistentStoreCoordinator *coordinator = self.persistentStoreCoordinator;
    if (coordinator) {
        moc = [NSManagedObjectContext new];
        [moc setPersistentStoreCoordinator:coordinator];
    }
    return moc;
}

@end

Answer 1

Not sure if you fixed your error, but check out: I keep on getting "save operation failure" after any change on my XCode Data Model

Also for me, I had the same storecordinator sqlite name as another project I was working on and had already ran...