Hi Everybody, I am new to zope. I ve been working on a zope product which makes uses of Catalog. Product was working fine of zope 2.5.1 recently we switched to Zope 2.6 since then following lines started giving an error. If I comment these lines product works fine. ex.Catalog.manage_delIndex('id','FieldIndex') ex.Catalog.manage_delIndex('title','FieldIndex') ex.Catalog.manage_delIndex('meta_type','FieldIndex') ex.Catalog.manage_delIndex('bobobase_modification_time','FieldIndex') ex.Catalog.manage_delIndex('PrincipiaSearchSource','FieldIndex') ex.Catalog.manage_delIndex('path','TextIndex') ex.Catalog.manage_delColumn('id') ex.Catalog.manage_delColumn('title') ex.Catalog.manage_delColumn('meta_type') ex.Catalog.manage_delColumn('bobobase_modification_time') ex.Catalog.manage_delColumn('summary') These lines are executed during instantiation of the product. Please help. Thanx in advnce Shashank