No se actualiza checkbox de alv
 

Buenas tardes.
Estoy realizando un alv grid(no esta orientado a objetos), tiene un campo checkbox (este de muestra en el alv de forma normal es decir puedo marcarla y demarcarla, esta vacio por defecto) el problema que presento es que cuando marco el checkbox y debageo el alv verifico que en mi tabla interna no se marca el check box,

Cuando marco el checkbox, visualmente se ven las marcas, pero internamente la tabla interna del alv no se actualiza.

Este es mi codigo:

pos = pos + 1.
s_catalogo-col_pos = pos.
s_catalogo-tabname = 'TI_ALV'.
s_catalogo-fieldname = 'CHECKBOXALV'.
s_catalogo-seltext_s = 'MARCA'.
s_catalogo-checkbox = 'X'.
s_catalogo-edit = 'X'.
*s_catalogo-key = 'X'.
*s_catalogo-input = 'X'.
APPEND s_catalogo TO ti_catalogo.
CLEAR s_catalogo.

s_layout-lights_fieldname = 'SEMAFORO'.
s_layout-box_fieldname = 'CHECKBOXALV'.
"s_layout-edit_mode = 'X'.


CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY'
EXPORTING
* I_INTERFACE_CHECK = ' '
* I_BYPASSING_BUFFER = ' '
* I_BUFFER_ACTIVE = ' '
i_callback_program = sy-repid
i_callback_pf_status_set = 'STATUS_F'"status_1001
i_callback_user_command = 'USER_COMMAND'"user_command
* I_CALLBACK_TOP_OF_PAGE = ' '
* I_CALLBACK_HTML_TOP_OF_PAGE = ' '
* I_CALLBACK_HTML_END_OF_LIST = ' '
* I_STRUCTURE_NAME =
* I_BACKGROUND_ID = ' '
* I_GRID_TITLE =
* I_GRID_SETTINGS =
is_layout = s_layout
it_fieldcat = ti_catalogo
* IT_EXCLUDING =
* IT_SPECIAL_GROUPS =
* IT_SORT =
* IT_FILTER =
* IS_SEL_HIDE =
* I_DEFAULT = 'X'
" i_save = 'X'
* IS_VARIANT =
* IT_EVENTS = 'TI_EVENTO'
* IT_EVENT_EXIT =
* IS_PRINT =
* IS_REPREP_ID =
* I_SCREEN_START_COLUMN = 0
* I_SCREEN_START_LINE = 0
* I_SCREEN_END_COLUMN = 0
* I_SCREEN_END_LINE = 0
* I_HTML_HEIGHT_TOP = 0
* I_HTML_HEIGHT_END = 0
* IT_ALV_GRAPHICS =
* IT_HYPERLINK =
* IT_ADD_FIELDCAT =
* IT_EXCEPT_QINFO =
* IR_SALV_FULLSCREEN_ADAPTER =
* IMPORTING
* E_EXIT_CAUSED_BY_CALLER =
* ES_EXIT_CAUSED_BY_USER =
TABLES
t_outtab = ti_alv
EXCEPTIONS
program_error = 1
OTHERS = 2
.
IF sy-subrc <> 0.
* Implement suitable error handling here
ENDIF.

solucion checkbok que no se actializa
 

*declare esto en mis variablles
DATA: g_repid TYPE sy-repid.
*agregue esto en su user command dentro del case
IF ref_grid IS INITIAL.
CALL FUNCTION 'GET_GLOBALS_FROM_SLVC_FULLSCR'
* EXPORTING
* IR_SALV_FULLSCREEN_ADAPTER =
IMPORTING
e_grid = ref_grid.
ENDIF.

IF NOT ref_grid IS INITIAL.
CALL METHOD ref_grid->check_changed_data.
ENDIF.