data : lt_month_names type table of t247.

call function 'MONTH_NAMES_GET'
   exporting
     language              = sy-langu
 * IMPORTING
 *   RETURN_CODE           =
   tables
     month_names           = lt_month_names
   exceptions
     month_names_not_found = 1
     others                = 2.
 if sy-subrc <> 0.
 * Error Message
 endif.

 Serkan AKKAVAK
Computer Engineer
ABAP Developer & SAP MM SD Consultant
Contact : serkurumsal@yandex.com