Cannot create an NSPersistentStoreCoordinator with a nil model

Question

Been having my first crack at Core Data and I\'m getting the following error when running my code on my device, but it works fine on the simulator..

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Answer 1

I've experienced a weird issue with Xcode 4.3.2 and iOS 5.

NSURL *modelURL = [[NSBundle mainBundle] URLForResource:@"NAME_OF_THE_MODEL" withExtension:@"momd"];

returns a valid URL but

__managedObjectModel = [[NSManagedObjectModel alloc] initWithContentsOfURL:modelURL];

returns a null NSManagedObjectModel. But after checking the documentation, it seems like NSManagedObjectModel needs a file where as NAME_OF_THE_MODEL.momd is a directory which contains a NAME_OF_THE_MODEL.mom file. Changing the URL to

NSURL *modelURL = [[NSBundle mainBundle] URLForResource:@"NAME_OF_THE_MODEL" withExtension:@"mom" subdirectory:@"NAME_OF_THE_MODEL.momd"];

then works. Seems weird though that Xcode generates code that doesn't work with itself...