I have a file where in filed1, field2 and field3 are key fields. Now these key fields are not unique, I need to update field 4, 5 and 6 based on the selection by user via subfile. To say f1 f2 f3 f4 f5 f6 A0123 A0123A *FILE CLM/D07 D07 1 A0123 A0123A *FILE CLM/D08 D08 2 A0123 A0123A *FILE CLM/D05...