Core Data Save Error (NSValidationErrorKey, Cocoa error 1570) saving NSDate

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The cocoa error 1570 means that mandatory fields are not filled in.
In this case, your have two attribues that are nil : Voedsel and datum.

I see in your code :

newDaglijst.Voedsel = geselecteerdVoedsel;
newDaglijst.datum = selDatum;

Check that geselecteerdVoedsel and selDatum are not nil or that they are overreleased and finish to be nil.
If they are optional data (but I don’t think so), define them as optional in coredata.

Hope this help,

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