Has anyone seen this error message before? I just tried building and I got that error... it's actually listed twice in a row... here's the section of code: Code: instructionsView.text = [welcomeInstructions appendString: dontSayInstructions]; [color=red] error: 'prop.118' has an incomplete type error: 'prop.118' has an incomplete type[/color] welcomeInstructions and dontSayInstructions are both NSMutableString. instructionsView is a UITextView. based on the options that are picked, the different sections of instructions could be different. So when a player picks "Show Instructions", I want it to generate the instructions by appending a bunch of different strings together. Edit: Wait... the text property of instructionsView says @property(nonatomic, copy) NSString *text Does that mean I have to use NSString rather than NSMutableString? Is there a way for me to modify the property so it'll accept NSMutableString?