I keep getting a little message in mid-screen of "isnull".
I have traced this through to coming from

Procedure TIB_Dataset.CheckRequiredFields;
var ii : integer;
begin
for ii := 0 to Fields.ColumnCount-1 do
begin
if isnull then showmessage('isnull');
If isnull and not readOnly and not Computed and Required then
begin
FocusControl;
raise EIB_DatasetError etc etc
end;
end;
end;

Is this simply an oversight that there are two "If isnulls" ?
Will it cause problems if I delete the first ?
Am I using an old version which has been updated?
Or must I avoid having any nulls in data which I am committing ?

Dave