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sql2005:

procedure TForm1.Button1Click(Sender: TObject);
begin
uniQuery.Close;
uniQuery.Sql.Text := 'Select Top 1 * From T'
UniQuery1.Open;
end;
If Table T has Binary or image Field ,
click button1 over than 7 times will raise a error. access voilation

I cannot reproduce the problem. Please specify the following:
- the exact version of UniDAC. You can see it in the About sheet of TUniConnection Editor;
- the exact version of your IDE.