GETWA_NOT_ASSIGNED error occured when using FM REUSE_ALV_GRID_DISPLAY

Question

Hi All,
I am using the Fm REUSE_ALV_GRID_DISPLAY to display output in the ALV grid.
I am getting the following error
"Field symbol has not yet been assigned."
Error analysis                                                                  
    You attempted to access an unassigned field symbol                          
    (data segment 32820).                                                                               
This error may occur for any of the following reasons:                      
    - You address a typed field symbol before it is set using ASSIGN            
    - You address a field symbol that points to a line in an internal table     
      that has been deleted                                                     
    - You address a field symbol that had previously been reset using           
      UNASSIGN, or that pointed to a local field that no longer exists          
    - You address a global function interface parameter, even                   
      though the relevant function module is not active,                        
      that is it is not in the list of active calls. You can get the list       
      of active calls from the this short dump.                                                                               
I used the Fm as :
  CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY'
   EXPORTING
    I_INTERFACE_CHECK                 = ' '
     I_BYPASSING_BUFFER                = 'X'
     I_BUFFER_ACTIVE                   = ' '
     I_CALLBACK_PROGRAM                = sy-repid
    I_CALLBACK_PF_STATUS_SET          = ' '
     I_CALLBACK_USER_COMMAND           = 'USER_COMMAND'
     I_CALLBACK_TOP_OF_PAGE            = 'TOP_OF_PAGE'
    I_CALLBACK_HTML_TOP_OF_PAGE       = ' '
    I_CALLBACK_HTML_END_OF_LIST       = ' '
    I_STRUCTURE_NAME                  =
    I_BACKGROUND_ID                   = ' '
    I_GRID_TITLE                      =
    I_GRID_SETTINGS                   =
     IS_LAYOUT                         = t_layout
     IT_FIELDCAT                       = ls_slis_fieldcat
    IT_EXCLUDING                      =
    IT_SPECIAL_GROUPS                 =
    IT_SORT                           =
    IT_FILTER                         =
    IS_SEL_HIDE                       =
     I_DEFAULT                         = 'X'
     I_SAVE                            = 'A'
    IS_VARIANT                        =
    IT_EVENTS                         =
    IT_EVENT_EXIT                     =
    IS_PRINT                          =
    IS_REPREP_ID                      =
    I_SCREEN_START_COLUMN             = 0
    I_SCREEN_START_LINE               = 0
    I_SCREEN_END_COLUMN               = 0
    I_SCREEN_END_LINE                 = 0
    I_HTML_HEIGHT_TOP                 = 0
    I_HTML_HEIGHT_END                 = 0
    IT_ALV_GRAPHICS                   =
    IT_HYPERLINK                      =
    IT_ADD_FIELDCAT                   =
    IT_EXCEPT_QINFO                   =
    IR_SALV_FULLSCREEN_ADAPTER        =
  IMPORTING
    E_EXIT_CAUSED_BY_CALLER           =
    ES_EXIT_CAUSED_BY_USER            =
    TABLES
      t_outtab                          = gt_output
   EXCEPTIONS
     PROGRAM_ERROR                     = 1
     OTHERS                            = 2
  IF sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
         WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
  ENDIF.
Any help on this would be appreciated,
Thanks in advance.
Sharat.

Answer 1

This is the error i get when i try to read the input data entered on the ALV grid. The code shown is from the class cl_gui_alv_grid.
183           translate ls_cells_temp-value to upper case.   "#EC TRANSLANG
184           assign ls_cells_temp-value to <l_currency>.
185         else.
186           assign ls_cells_temp-value to <l_currency>.
187           clear <l_currency>.
188         endif.
189         if <l_currency> is initial.
190           assign component ls_fieldcat-qfieldname
191                            of structure <ls_wa> to <l_currency>.
192         endif.
193         if <l_currency> is initial.
194           assign ls_fieldcat-QUANTITY to <l_currency>.
195           if sy-subrc ne 0.
196             assign space to <l_currency>.
197           endif.
198         endif.
199       endif.
200     else.
201       if not ls_fieldcat-currency is initial.
202         assign ls_fieldcat-currency to <l_currency>.
203       elseif not ls_fieldcat-quantity is initial.
204         assign ls_fieldcat-quantity to <l_currency>.
205       else.
206         assign space to <l_currency>.
207       endif.
208     endif.
209
210 *   If field has not DDIC referencen
211     if ls_fieldcat-ref_table is initial.
212 *--   Formal field check without DDIC reference
>>>>       call method me->formal_field_check_no_ddic
214         exporting
215           i_currency    = <l_currency>
216           i_value       = ls_cells-value
217           i_row_id      = ls_cells-row_id
218           i_tabix       = l_tabix
219           is_fieldcat   = ls_fieldcat
220         importing
221           eflg_invalid  = eflg_invalid
222         changing
223           c_field       = <l_field>
224           ct_good_cells = et_good_cells
225           ct_mod_cells  = et_mod_cells.
226     else.
227 *--   Formal field check with DDIC reference
228       call method me->formal_field_check_ddic
229         exporting
230           i_currency    = <l_currency>
231           i_value       = ls_cells-value
232           i_row_id      = ls_cells-row_id