refrescar una ALV editable

[GaBo_s]

intenta con esto
" to reflect the data changed into internal table
"ACTUALIZA LOS REGISTROS SELECCIONADOS
IF REF_GRID IS INITIAL.
CALL FUNCTION 'GET_GLOBALS_FROM_SLVC_FULLSCR'
IMPORTING
E_GRID = REF_GRID.
ENDIF.

IF NOT REF_GRID IS INITIAL.
CALL METHOD REF_GRID->CHECK_CHANGED_DATA.
ENDIF.