Lee writes:

ERROR: The call can not be completed as dialed. Error Type: IOError Error Value: [Errno 13] Permission denied: '/usr/local/Zope-2.1.6-src/var/gadfly/demo/demo.gfl' This is a file permission problem with "/usr/local/Zope-2.1.6-src/var/gadfly/demo/demo.gfl"

Check that the user running Zope is allowed to read and write to this file (and maybe the directory "/usr/local/Zope-2.1.6-src/var/gadfly/demo/". It has nothing to do with Chapter 10. Dieter