Hola,
Es necesario crear el método GET_V del nuevo campo creado.
Agregue el código siguiente en el método GET_V y usted no conseguirá este error.
Código de la siguiente manera:
* data
data: lr_ddlb type ref to cl_Crm_uiu_ddlb,
lt_dropdown type BSP_WD_DROPDOWN_TABLE,
ls_dropdown type bsp_WD_dropdown_line.
create object lr_ddlb
exporting
iv_source_type = if_bsp_wd_valuehelp_pldescr=>source_type_table.
if lr_ddlb is bound.
append initial line to lt_dropdown.
ls_Dropdown-KEY = 'OPT1'.
LS_DROPDOWN-VALUE = 'Option 1'.
append ls_Dropdown to lt_dropdown.
ls_Dropdown-KEY = 'OPT2'.
LS_DROPDOWN-VALUE = 'Option 2'.
append ls_Dropdown to lt_dropdown.
ls_Dropdown-KEY = 'OPT3'.
LS_DROPDOWN-VALUE = 'Option 3'.
append ls_Dropdown to lt_dropdown.
ls_Dropdown-KEY = 'OPT4'.
LS_DROPDOWN-VALUE = 'Option 4'.
append ls_Dropdown to lt_dropdown.
rv_valuehelp_descriptor ?= lr_ddlb.
endif.
* Note : Please change the dropdown key and values to your requried values.
Regards,
Naresh