That is interesting because we are having it with Subaru's and Hondas.

We are also having this exact issue. It is only happening with about half of our scheduled appointments.

System.Data.StrongTypingException: The value for column 'VinCode' in table 'Engine' is DBNull. ---> System.InvalidCastException: Unable to cast object of type 'System.DBNull' to type 'System ...