ALV Print dump

Hi

I am getting ABAP dump when i printing alv report using PRINT button.

Error is

Field symbol has not yet been assigned

CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY'
    EXPORTING
      I_CALLBACK_PROGRAM      = G_REPID
      I_CALLBACK_USER_COMMAND = G_USER_COMMAND
      IT_FIELDCAT             = FIELDCAT[]
      IS_LAYOUT               = GS_LAYOUT
      I_SAVE                  = G_SAVE
      IT_SORT                 = GS_SORT
      IT_FILTER               = GS_FILTER
      IS_VARIANT              = GS_VARIANT
      IT_EVENTS               = GT_EVENTS[]
      IS_PRINT                = GS_PRINT
    IMPORTING
      E_EXIT_CAUSED_BY_CALLER = G_EXIT_CAUSED_BY_CALLER
      ES_EXIT_CAUSED_BY_USER  = GS_EXIT_CAUSED_BY_USER
    TABLES
      T_OUTTAB                = I_PODETL
    EXCEPTIONS
      PROGRAM_ERROR           = 1
      OTHERS                  = 2.

Pls advise me

Thanks

Kumar