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In line 1, you are fetching the first row of the VO.
and in line 5, you are setting a value to the row's attribute, Pos_Flag. You can also do the same by using method row.setPos_Flag(TRUE);
But if i skip the line 1 ,the whole program does not work well.
Thanks & Regards
Yes. That will not work because in first line you are fetching the first row of VO and then in line 5, you are setting attribute of the same row.