Context does not save the changes with error 1550

Question

I\'m trying to update an entity and save the changes. I\'m getting always the following error:

The operation couldn’t be completed. (Cocoa error 1550.)
         


        

Answer 1

I ran into the 1550 error code as well. I had accidentally changed the data model and modified the destination of one of the relationships in an entity. Make sure to double check that the entity described by NSValidationErrorObject and the relationship described by NSValidationErrorKey are what you intend them to be.