Yep... That's the problem. Julio, you can go into the class_temp >Basic tab, copy the class ID from there (and then change it). Then, >replace the class ID in your new ZClass. Note that this will break >any new instances you created (you may want to delete those first).

I think the howto mentioned below has the step-by-step procedure.

Take a look at http://www.zope.org/Members/AlexR/ChangingBaseClasses >for the recommended unofficial way to do it.

Kevin

Yes, you were right! But in this case best way is really to go with the document mentioned above. Thank you very much, Júlio Dinis Silva ________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com