The problem isn't with the book, it's a bug in the latest version of ProjectBuilder.
Here's the answer to your problem, stated more clearly and succinctly than I could do it ;):
http://cocoa.mamasam.com/COCOADEV/2002/12/2/52959.php
Oh, yeah, and a special "p.s." to tjw: I'll bet you're...
I'm trying to write an application that (among other things) continually takes incoming text data from a network socket and writes it to an NSTextView window. (I'm using EDStream, part of the EDCommon framework, to handle the network operations.)
The basic logic of this part of the model...