I've tried two or three tutorials on Creating a ZClass, and seem to get the same type of error every time. Following the example in The Zope Book, Ch.14 (http://www.zope.org/Documentation/Books/ZopeBook/current/CustomZopeObjects.s...) when I get to the part "Go ahead and select ZooExhibit from the add list and create a new Exhibit with the id 'FangedRabbits'. ", I get the following error after clicking Add: Error Type: NameError Error Value: global name 'ZooExhibit' is not defined Can anyone help with this? I've looked at posts in the past that have asked the same, but there doesn't seem to be anything that helps. Thanks very much Ashley _________________________________________________________________ Add photos to your e-mail with MSN 8. Get 2 months FREE*. http://join.msn.com/?page=features/featuredemail