thisform.AllOk()
thisform.Command1.Enabled = .NOT. EMPTY(thisform.Date1.Text1.Value) .AND.;
.NOT. EMPTY(thisform.OsZp.Text1.Value)
where thisform.Date1.Text1 is the problem field
Method AllOk is for check that every needed data has some value and enabled SAVE DATA button
Against Stupidity the Gods themselves Contend in Vain - Johann Christoph Friedrich von Schiller
The only thing normal about database guys is their tables.