DESCRIBE FIELD

Hello Guys,

for the following code :

I get 0 for LV_COMPONENTS ,

        DATA : LV_TYPE TYPE C,

                    LV_COMPONENTS TYPE I.

       FIELD-SYMBOLS : <LFS_COMPONENTS> TYPE ANY.

       REF_ROWTYPE ?= CL_ABAP_TYPEDESCR=>DESCRIBE_BY_NAME( IM_VIEW ).

       CL_ABAP_TABLEDESCR=>CREATE(

       EXPORTING

         P_LINE_TYPE          = REF_ROWTYPE

         P_TABLE_KIND         = CL_ABAP_TABLEDESCR=>TABLEKIND_STD

       RECEIVING

         P_RESULT             = LR_TDESCR ).

       CREATE DATA REF_ITAB TYPE HANDLE LR_TDESCR.

        ASSIGN REF_ITAB->* TO <FT_ITAB>.

     DESCRIBE FIELD <FT_ITAB> TYPE LV_TYPE COMPONENTS  LV_COMPONENTS .

do you know why?  I have try several things , Even with

ASSIGN COMPONENT

Which doesnt work , I can see the content of  <FT_ITAB> during debug.