with orqry1 do
    begin
        Close;
        SQL.Clear;
        SQL.Add('INSERT INTO TB_INSA_COM ('
               +'PERSON_NO ,              '
               +'COM_NAME ,               '
               +'DAY ,                    '
               +'GRADE ,                  '
               +'DEF                      '
               +')                        '
               +'VALUES                   '
               +'(                        '
               +':PERSON_NO ,             '
               +':COM_NAME ,              '
               +':DAY ,                   '
               +':GRADE ,                 '
               +':DEF)                    ');

      for i := 1 to advstrngrd1.ColCount -1 do
      begin
        for j := 1 to advstrngrd1.RowCount -1 do
        begin

          ParamByName('PERSON_NO').AsString := advstrngrd1.Cells[i,j];
          ParamByName('COM_NAME').AsString := advstrngrd1.Cells[i,j];
          ParamByName('DAY').AsString := advstrngrd1.Cells[i,j];
          ParamByName('GRADE').AsString := advstrngrd1.Cells[i,j];
          ParamByName('DEF').AsString := advstrngrd1.Cells[i,j];

          ExecSQL;
        end;
      end;
    end;

저장버튼을 누르면 EInternalError가 뜨네요...
초보라 어디서 문제인지 잘 모르겠네요..