Field Symbols and dinamicaly selecting tables

Question

I want to be able to select dinamicaly witch table to print.
their structure is the very similar but not equal (the order of the elements change)
so far im getting a "The data object "<WA_T>" has no structure and therefore no component ..." error
how can give it a structure?
FIELD-SYMBOLS: <t> TYPE STANDARD TABLE,
                   <wa_t> TYPE ANY.
    IF r1 = 'X'.
      ASSIGN ('TABI') TO <t>.
      ASSIGN ('WA_TABI') TO <wa_t>.
    ELSEIF r2 = 'X'.
      ASSIGN ('TABI2') TO <t>.
      ASSIGN ('WA_TABI2') TO <wa_t>.
    ELSEIF r3 = 'X'.
      ASSIGN ('TABI3') TO <t>.
      ASSIGN ('WA_TABI3') TO <wa_t>.
    ENDIF.
    LOOP AT <t> INTO <wa_t>.
      WRITE:/ <wa_t>-vkorg,
              <wa_t>-name1,
              <wa_t>-vbeln,
              <wa_t>-audat,
              <wa_t>-vbeln_d,
              <wa_t>-wadat_ist,
              <wa_t>-vbeln_b,
              <wa_t>-fkdat,
              <wa_t>-gbstk.
    ENDLOOP.
Edited by: RagnaRock on Apr 8, 2010 12:18 PM

Answer 1

The fields to be printed can not be directly referred in the field symbol. Use 'ASSIGN COMPONENT' statement to access the fileds.
Modified the above program as per your requirements....
FIELD-SYMBOLS: <t> TYPE STANDARD TABLE,
                            <wa_t> TYPE ANY,
                            <field> TYPE ANY.
TYPES : BEGIN OF ty_tab,
         vbeln TYPE vbeln,
         erdat TYPE erdat,
        END OF ty_tab.
DATA : tabi TYPE STANDARD TABLE OF ty_tab,
       wa_tabi TYPE ty_tab.
SELECT vbeln erdat FROM vbak
  INTO TABLE tabi
  UP TO 10 ROWS.
ASSIGN ('TABI') TO <t>.
ASSIGN ('WA_TABI') TO <wa_t>.
LOOP AT <t> ASSIGNING <wa_t>.
  ASSIGN COMPONENT 'VBELN' OF STRUCTURE <wa_t> TO <field>.  "Refer a particular field
  WRITE:/ <field>.
ENDLOOP.
Edited by: Satyajit on Apr 8, 2010 4:21 PM