Hi, I am using an Objective c class, a subclass of NSObject. This class cannot be modified. I have an instance of this class that I wish to write to a file which can be retrieved and later reinstate. The object does not conform to NSCoding.

To sum up, I need to save an instance of a class to a file which can be retrieved later, without using any of the NSCoding methods such as NSKeyedArchiving encodeWithCoder ...

Using them returns this... NSInvalidArgumentException ...encodeWithCoder:] unrecognised selector sent to instance...

Is there any other way I can store this object for later use Thank you