Error saving iPhone Coredata

Question

I am trying to create a main data application. Several times when I try to save the data, I see the following error:

Error: NSInvalidArgumentException, Reason: * -_referenceData64, defined only for the abstract class. Define - [NSTemporaryObjectID_default _referenceData64] !, Description: * -_referenceData64 is for an abstract class only. Define - [NSTemporaryObjectID_default _referenceData64]!

I did not understand why this error comes and how to avoid it. Can someone help me.

Answer 1

: , . , , , , . , , _referenceData64 .

: http://www.cocoadev.com/index.pl?TemporaryObjectIdsDoNotRespondToReferenceData

:

_referenceData64. "". "abstract". , .

. , . .a >