NSManagedObjectModel initWithContentsOfURL returns nil eventhough the modelURL is valid

Question

my NSManagedObjectModel is returning nil eventhough the path is correct.

        NSString *modelKey = [NSString stringWithFormat:@\"/%@/Model\", name];
    N         


        

Answer 1

When I ran the project the first time, I specified the extension as xcdatamodeld. But that failed since, it should be momd. But I passed a nil instead of momd assuming extension won't be mandatory. But with nil, the initWithContentsOfURL failed and when I finally entered momd,it worked fine.