JCL to run MFJSORT contains the syntax "SPLIT1R=1"
When run the JCL fails with the error 

                     SORT FIELDS=COPY                                                                                                          
                     OUTFIL FNAMES=(ENTCNTRL,ENTRESTO),                                                                                        
                     SPLIT1R=1                                                                                                                 
SORT104E: **                                                                                                                         
          Invalid operand keyword 'SPLIT1R'                                                                                          
SORT015U: Command statement error(s) detected           

Full article: https://portal.microfocus.com/s/article/KM000014790