While developing a CoreData based application if you change your data model and try to rerun you get the following error:
“The model used to open the store is incompatible with the one used to create the store”
The error occurs because the application (in the simulator) still has the old CoreData database while the ModelObjectContext in your application is referring to your new CoreData.
The only way to fix this is problem is to delete the application from the simulator.






