Hi Ralf, I understand. This is a question of one of our programmers: When I open DISQLite3_World_ClientDataSet.dpr demo I get error "Error creating form: Operation not allowed on a unidirectional dataset". It arises at opening the form TfrmWorld. How can I open this form in design mode? _______________________________________________ Delphi Inspiration mailing list yunqa@xxxxxxxxxxxxx //www.freelists.org/list/yunqa