fica document header change

data lt_kochanges type standard table of  fkkchdoc_ko with header line.

  refresh lt_kochanges.

  lt_kochanges-chfld = 'ZZEXBEL'.
  lt_kochanges-chval = 'xxxxxx'.
  append lt_kochanges.

  call function 'FKK_DOCUMENT_CHANGE'
    exporting
      i_opbel              = s_opbel-low
    tables
      t_kochanges          = lt_kochanges[]
    exceptions
      document_not_found   = 1
      new_value_rejected   = 2
      field_rejected       = 3
      field_unknown        = 4
      invalid_call         = 5
      item_already_cleared = 6
      concurrent_clearing  = 7
      enqueue_error        = 8
      no_authority         = 9
      others               = 10.