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

I just encountered this issue after changing the case of the name of the .xcdatamodeld file (e.g. refactored "mydatastore.xcdatamodeld" to "MyDatastore.xcdatamodeld") on a case-insensitive filesystem.

The fix includes both of the above answers:

1. Refactor the data model file to a distinctly different name, e.g. "MyDatastoreTemporary.xcdatamodeld"

2. Product > Clean

3. Close XCode. Re-open XCode and the project.

4. Refactor the data model file back to its final name, e.g. "MyDatastore.xcdatamodeld"

5. Product > Clean

6. Close XCode. Re-open XCode and the project.