Nachdem in der DS ACT_DATEI1 das Prefix nur "FILE" ist, werden diese Felder mit DS_MONATE zusammenstoßen.
Ich schätze du willst im Prefix "FILE_" verwenden?

PHP-Code:
FDATEI     IF   E           K DISK    PREFIX(FILE)                
                                                                  
D ACT_DATEI1    E DS                  EXTNAME(DATEIPREFIX(FILE_
D SAVE_DATEI1   E DS                  EXTNAME(DATEIPREFIX(SAVE_)
                                                                  
D DS_MONATE       DS                                              
D  FILEJAN                                                        
D  FILEFEB                                                        
D  FILEMAR                                                        
D  FILEAPR                                                        
D  FILEMAY                                                        
D  FILEJUN                                                        
D  FILEJUL                                                        
D  FILEAUG                                                        
D  FILESEP                                                        
D  FILEOCT                                                        
D  FILENOV                                                        
D  FILEDEC                                                        
D AR_MONATE                     12  2 DIM
(12OVERLAY(DS_MONATE
lg Andreas