I got this error tonight and I have never seen it before, What does it mean? I instantiated an Object that contained NSString instance variables and int variables. It then took the information from NSTextFields put them into the variables and save the object to an NSMutableArray before releasing the object. But when my TableView tries to crate a new object from the stored object in the array 1 of the NSStrings says 'Variable is not a CFString'. What would cause that?