Apple rejected - can not reproduce crash - ios

Question

Apple rejected my app with a crash log indicating that they have tested it on an iPhone 6 with iOS 8.0.2. I tested my app with the same iPhone 6 and also on 8.0.2, it works perfect. I tried it with testflight via iTunesConnect, assuming, that this is exactly the same away as Apple does their testing - obviously not!
Does anyone have an idea, how I can solve that issue (already got in contact with the review team, but they couldn't help, as they say they are not technical support and just test the apps.
The problem I have is (from my point of view anyway strange): It crashes when it add the persistent store:
NSError *error = nil;
_persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel:[self managedObjectModel]];
if (![_persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:storeURL options:nil error:&error]) {
/*
Replace this implementation with code to handle the error appropriately. abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
Typical reasons for an error here include:
* The persistent store is not accessible;
* The schema for the persistent store is incompatible with current managed object model.
Check the error message to determine what the actual problem was.
If the persistent store is not accessible, there is typically something wrong with the file path. Often, a file URL is pointing into the application's resources directory instead of a writeable directory.
If you encounter schema incompatibility errors during development, you can reduce their frequency by:
* Simply deleting the existing store:
[[NSFileManager defaultManager] removeItemAtURL:storeURL error:nil]
* Performing automatic lightweight migration by passing the following dictionary as the options parameter:
#{NSMigratePersistentStoresAutomaticallyOption:#YES, NSInferMappingModelAutomaticallyOption:#YES}
Lightweight migration will only work for a limited set of schema changes; consult "Core Data Model Versioning and Data Migration Programming Guide" for details.
*/
NSLog(#"Unresolved error %#, %#", error, [error userInfo]);
abort();
}
It obviously crashes because I have the abort()statement still in there, but I'm not sure what to do instead (i.e to handle the problem - just delete and try to add the store again?)
As it works perfect on my iPhone, I assume, that it is not one of the problems listed in the source code (like directory, model etc. am I right?
I'm struggling with that now for several days, any help or idea is more than appreciated!!

Answer 1

Common reason for this to happen is when there is already a file at storeURL and it does not conform to model that you specify.
As a fix for that here is what you can do
1) Enable lightweight migration
2) Delete existing file and try again
NSDictionary *options = #{NSMigratePersistentStoresAutomaticallyOption: #YES,
NSInferMappingModelAutomaticallyOption: #YES
};
BOOL successOfAdding = [_persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType
configuration:nil
URL:storeURL
options:options
error:&error] != nil;
if (successOfAdding == NO)
{
// Check if the database is there.
// If it is there, it most likely means that model has changed significantly.
if ([[NSFileManager defaultManager] fileExistsAtPath:storeURL.path])
{
// Delete the database
[[NSFileManager defaultManager] removeItemAtURL:storeURL error:nil];
// Trying to add a database to the coordinator again
successOfAdding = [_persistentStoreCoordinator addPersistentStoreWithType: NSSQLiteStoreType configuration:nil URL:storeURL options:nil error:&error] != nil;
if (successOfAdding == NO)
{
NSLog(#"Unresolved error %#, %#", error, [error userInfo]);
abort();
}
}
And about rejection - do you have previous versions of your app?
Also, where are you attempting to store your database? May be there is no access to that path?