I'm trying to install a product and this error is thrown: 2001-11-14T12:03:55 ERROR(200) Zope Couldn't install EMarket Traceback (innermost last): File /apache/ZopeInstallation/Zope_software_home/lib/python/OFS/Application.py, line 658, in install_product (Object: Zope) (Info: EMarket) File /apache/ZopeInstallation/Zope_software_home/lib/python/App/Product.py, line 595, in initializeProduct (Object: Products.EMarket) File /apache/ZopeInstallation/Zope_software_home/lib/python/OFS/ObjectManager.py, line 324, in _setObject (Object: Products) File /apache/ZopeInstallation/Zope_software_home/lib/python/OFS/ObjectManager.py, line 332, in manage_afterAdd (Object: EMarket) File /apache/ZopeInstallation/Zope_software_home/lib/python/ZClasses/ZClass.py, line 492, in manage_afterAdd (Object: basket) File /apache/ZopeInstallation/Zope_software_home/lib/python/ZClasses/ZClass.py, line 446, in _register (Object: basket) Duplicate Class Ids What the heck is a Duplicate Class ID? Does anyone know? Is this possible to fix? How? I'd really appreciate an answer. Thanks, BenO