Dynamic ALV - Field color doubt

Hi.

I'm developing a dynamic ALV which I need to format a line with a color.

I've added field celltab to my internal dynamic table (ALV out). But when adding lines to that, it gives a dump.

FIELD-SYMBOLS: <dyn_table> TYPE STANDARD TABLE,
               <dyn_wa>.

(...)

data: l_lvc_t_styl TYPE lvc_t_styl..

*-Columna celttab (Style)
  r_datadescr ?= cl_abap_datadescr=>describe_by_data( l_lvc_t_styl ).
  gw_component-name = 'CELLTAB'.
  gw_component-type = r_datadescr.
  APPEND gw_component TO gt_component.

(...)

  DATA : ls_cell type lvc_s_styl.
  FIELD-SYMBOLS: <fs_COLLTAB> TYPE STANDARD TABLE. " OF lvc_s_styl.
  
    ls_cell-fieldname = L_COL.
    ls_cell-style     = '0000000C'.
    ASSIGN COMPONENT 'CELLTAB' OF STRUCTURE <dyn_wa> TO <fs_COLLTAB>.
    APPEND ls_cell TO <fs_COLLTAB>. <------  - - - - - - - - - - - - - - - - - -- DUMP here

    APPEND <dyn_wa> TO <dyn_table>.

thanks.

Glauco