How to use REUSE_ALV_LIST_LAYOUT_INFO_GET to capture the current ALV grid layout?

Hi all, I have an program that displays ALV grid which the user can edit its layout. My goal is to get the layout of the ALV grid which was saved in a variant.

its columns are like this:

Plant | Material | Material Description | Delivery Date | Quantity | Country | <---Default layout

Material | Material Description | Country | Delivery Date | Quantity <---Layout named ZLAY01 which is saved via variant.

To execute my program it has the following fields:

Plant

Material

Material Description

Delivery Date

Quantity

Country

and a field(named p_layout) for variant which reads the layout that will be displayed.

However, I was getting error with the FM in which it returns sy-subrc = 1 or no_infos. Can you please guide me where did I went wrong? thanks

form obtain_alv_layout_data.
  x_layout-f2code            = space.
  x_layout-zebra             = 'X'.
  x_layout-get_selinfos      = 'X'.
  x_layout-colwidth_optimize = space.
  x_layout-cell_merge        = space.
  x_layout-no_input          = space.
  x_layout-no_vline          = space.
  x_layout-no_colhead        = space.
  x_layout-lights_condense   = space.
  x_layout-totals_text       = space.
  x_layout-subtotals_text    = space.
  x_layout-totals_only       = space.
  x_layout-key_hotspot       = space.
  x_layout-detail_popup      = space.
  x_layout-group_change_edit = space.
  x_layout-group_buttons     = space.
  x_layout-group_buttons     = space.
endform.    
CALL FUNCTION 'REUSE_ALV_LIST_LAYOUT_INFO_GET'
 IMPORTING
   ES_LAYOUT                        = x_layout
   ET_FIELDCAT                      = t_fieldcat[]
 EXCEPTIONS
   NO_INFOS                         = 1
   PROGRAM_ERROR                    = 2
   OTHERS                           = 3
.