On distribution – is delivery packed?

ENHANCEMENT 1  YDISTRIBUTE.
if ( sy-tcode eq 'VL06I' or sy-tcode eq 'VL06ID' ) and  ( if_d_proctype eq proctype_inbdist ).
"VL06I - do not process the enhancement if it distributes via other ways"
"proctype_inbdist - checking only inbound deliveries"
 types: begin of t_params,
  paramval like yparamconst-paramval,
 end of t_params.
 data: lt_params type standard table of t_params,
       wa_params like line of lt_params, "work area (header line)"
       is_zles type boolean.  "default abap_false."
"which delivery types for checking/processing are defined in our Z-table?"
 select paramval from yparamconst into corresponding fields of table lt_params where paramid  = 'LIEFERUNGSNUMMER'.
 if sy-subrc eq 0.
  field-symbols: <ls_lfart> type lipov.
  loop at ct_worktab assigning <ls_lfart>.
    read table lt_params with key paramval = <ls_lfart>-lfart transporting no fields.
   if sy-subrc eq 0.
    is_zles = abap_true.
"all the selected delivery [types] are in yparamconst"
   endif.
  endloop.
 if is_zles eq abap_true.
  data: lt_wahl like gs_select occurs 0 with header line,
        begin of lt_wahl2 occurs 0,
          vbeln like likp-vbeln,
          verur like likp-verur,
        end of lt_wahl2,
        l_msg type c length 50,
        ans type char1.
  field-symbols: <ls_arbeit> type lipov,
                 <ls_wahl2> like line of lt_wahl2.
  loop at ct_worktab assigning <ls_arbeit>.
    lt_wahl-vbeln = <ls_arbeit>-vbeln.
    collect lt_wahl.
  endloop.
 
  check not lt_wahl[] is initial.
  select vbeln verur from likp
               into table lt_wahl2
               for all entries in lt_wahl
               where vbeln eq lt_wahl-vbeln.
"in addition we checking if the field External ID isn't empty"
  loop at lt_wahl2 transporting no fields
    where verur eq space.
  endloop.
 
  if sy-subrc eq 0.
   message s000(Y_YSD) into l_msg.
   call function 'POPUP_TO_CONFIRM'
    exporting
      titlebar       = 'Confirm'
      text_question  = l_msg
      text_button_1  = 'Yes'
      text_button_2  = 'No'
      display_cancel_button = ''
      default_button = '2'
    importing
      answer         = ans.
   if ans eq 2.
    return.
   endif.
  endif.
 
  clear l_msg.
 
  field-symbols: <ls_vepo> type lipov.
  data lt_vepo like VEPO occurs 0.
 
  loop at ct_worktab assigning <ls_vepo>.
    select vbeln from vepo into corresponding fields of table lt_vepo where vbeln eq <ls_vepo>-vbeln.
     if sy-subrc ne 0.
       message s001(Y_YSD) into l_msg.
       call function 'POPUP_TO_CONFIRM'
        exporting
          titlebar       = 'Confirm'
          text_question  = l_msg
          text_button_1  = 'Yes'
          text_button_2  = 'No'
          display_cancel_button = ''
          default_button = '2'
        importing
          answer         = ans.
       if ans eq 2.
        return.
   endif.
   endif.
  endloop.
 
 endif. "is_zles"
 
 endif.
endif.
ENDENHANCEMENT.