The messages mean there is no model. Either there is a problem in how you are using the Network Builder GUI tools, or there is a problem in the code you copied from Chapter 11, or both. Have you worked through the Network Builder tutorials on the Documentation page?http://www.neuron.yale.edu/neuron/docs
They're simple and fairly quick and should familiarize you with proper GUI usage. Once you have done those, you might try working through chapter 11 again. If you find an error in that chapter or continue to run into difficulty, please let me know.
Two other items:
1. I split these new posts off from the old thread because they diverged so much from the original topic that they deserved a separate thread. In doing that, somehow I managed to split your first post into a third thread. I had to copy it, then paste it into my reply (see way above). So much for the ease of using GUI tools.
2. In the future, when quoting text output from NEURON please just copy and paste the text directly into your message, then select it and click on the "Code" button above the text entry area. This is quicker and uses less space than snapshotting a window and posting it as a bitmap.