Edit Question - KnowledgeHub

Title Body

I'm working on a Cocoa-Touch app, it uses CoreData and has some NSPersistentObject subclasses generated by the XCode model editor. I've noticed that recently, when saving the context I get an error which has as user info the following part: (gdb) po ui { "Dangling reference to an invalid object." = <null>; NSAffectedObjectsErrorKey = <dump #1 of someObject>; NSLocalizedDescription = "Operation could not be completed. (Cocoa error 1550.)"; NSValidationErrorKey = <someKey pointing to someObject #1>; NSValidationErrorObject = <dump #2 of someOtherObject which points to the dump #1 object>; NSValidationErrorValue = { <list of someMoreObjects> }; } There are on other keys in the user info dictionary. All the dumps I get are valid objects, I've verified them all. NSValidationErrorObject is an object which has an NSSet which contains objects of types dumped in NSAffectedObjectsErrorKey and NSValidationErrorValue . But all these objects are valid. Furthermore, this happens randomly, sometimes it happens, sometimes not, and sometimes the list dumped in NSValidationErrorValue is longer, sometimes shorter. I have no clue why this is happening, or what exactly the error is. Does anyone know what's going on? Any ideas what might cause this bizarre error?

Tags (comma-separated) Cancel