For info., I've just tested @LacaK's patch on a single table (without master record and its details records pattern): assigning "datasource.Enabled:= false" de-illuminates its navigator (all its buttons become grey) as we should expect (tested with its IBX grid too, wich is not disabled, or emptied of data, as if the transactional connection was disabled, desactived; but this is not really abnormal with such transactionnal clients-server + cached updates layers).