ALV field catalog not found

Question

Hello there,
I am having problem changing a classic ABAP report to ALV as am hitting the error "field catalog not found".
I am using  this 2 functions to help me convert it to ALV format.
and a snippet from my code :
    MODIFY gt_i_data FROM wa_i_data TRANSPORTING priokx.
     ENDLOOP .
  gt_report[] = gt_i_data[].
  perform f_assign_alv.
  perform f_display_alv.
1.f_assign_alv
CALL FUNCTION 'REUSE_ALV_FIELDCATALOG_MERGE'
       EXPORTING
            i_program_name     = c_repid
            i_internal_tabname = 'GT_REPORT'
            i_inclname         = c_repid
       CHANGING
            ct_fieldcat        = gt_fieldcat.
2._display_alv.
CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY'
       EXPORTING
            i_grid_title  = v_grid_title
            is_layout     = v_layout
            it_fieldcat   = gt_fieldcat
       TABLES
            t_outtab      = GT_REPORT
       EXCEPTIONS
            program_error = 1
            OTHERS        = 2.
  IF sy-subrc NE 0.
    MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno
            WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
  ENDIF.
I noticed during debug,inside 'REUSE_ALV_GRID_DISPLAY' the possible location of error cud be at :
if i_screen_start_column is initial and -
>all these values are empty
     i_screen_start_line   is initial and
     i_screen_start_column   is initial and
     i_screen_end_line     is initial.
    gt_grid-flg_popup = space.
    call screen 500.  else. -
>point of error
    gt_grid-flg_popup = 'X'.
    call screen 700
              starting at i_screen_start_column i_screen_start_line
              ending   at i_screen_end_column i_screen_end_line.
  endif.
Need your expert advice, please guide.Thanks so much!!

Answer 1

Hi Neesha,
If you are using FM 'REUSE_ALV_FIELDCATALOG_MERGE', during data/types declaration, you have to use the LIKE keyword and not the TYPE keyword.
If you use TYPE, the fieldcat will not be populated.
DATA: BEGIN OF GT_REPORT OCCURS 0,
ebeln LIKE ekpo-ebeln,
ebelp LIKE ekpo-ebelp,
matnr LIKE ekpo-matnr,
werks LIKE ekpo-werks,
menge LIKE ekpo-menge,
netpr LIKE ekpo-netpr,
peinh LIKE ekpo-peinh,
netwr LIKE ekpo-netwr,
END OF GT_REPORT.
Regards,
Jovito.
Edited by: dsouzajovito on Jan 10, 2011 11:32 AM