dump for the program?

PARAMETERS:
  TAB_NAME    LIKE SY-TNAME,           "Table name
  TAB_COMP    LIKE X031L-FIELDNAME,   "Field name
  ANZAHL      TYPE I DEFAULT 10.       Number of lines

FIELD-SYMBOLS: <WA>   TYPE ANY,
               <COMP> TYPE ANY.

  DATA: WA_REF TYPE REF TO DATA.

  CREATE DATA WA_REF TYPE (TAB_NAME). "Suitable work area
  ASSIGN WA_REF->* TO <WA>.

SELECT * FROM (TAB_NAME) INTO <WA>
  UP TO anzahl ROWS.
  WRITE: / TAB_COMP, <COMP>.
  ENDSELECT.

i am getting dump for this program?

so, i assigned like this

assign tab_comp to <comp>.

then it is displaying only field name.

to display field values what needs to be done?