i am trying this

procedure TForm1.IB_DataSource1DataChange(Sender: TIB_StatementLink;
Statement: TIB_Statement; Field: TIB_Column);
begin
if Field.FieldName = 'SAMPLE' and Field.IsModified then
begin
// modified another fields
end;
end;

and AV comes.

how to fix this?

thanks to help.

Iwan