I have a detail datawindow (dw further) type which is linked to a master dw. When I have tried to update database with invalid data filled in the detail dw dberror event is launched. That is caused by reference integrity constraints in database which I would like to test without transaction. I have tried to extend pfc_validation event but it doesn't cover all causes. I had also tried to prevent the SQL error dialog box by return value in dberror event which was useless too. Is there any way to prevent SQL error message appearing (or at least invalid insert query sending) ?