Re: delete adjacent duplicates retaining spaces

Try this logic.

SORT itab BY fld1.

LOOP AT itab INTO wa WHERE fld1 IS INITIAL.
   APPEND wa TO itab1.
   CLEAR wa.
ENDLOOP.

DELETE ADJACENT DUPLICATES FROM itab COMPARING fld1.

append lines of itab1 to itab.

SORT itab BY fld1.