例題
[C3169.cob] 000001 IDENTIFICATION DIVISION. 000002 PROGRAM-ID. C3169. 000003 ENVIRONMENT DIVISION. 000004 INPUT-OUTPUT SECTION. 000005 FILE-CONTROL. 000006 SELECT FILE-1 ASSIGN TO SYS001 000007 ORGANIZATION IS RELATIVE 000008 ACCESS MODE IS SEQUENTIAL 000009 RELATIVE KEY IS REL-KEY. 000010 DATA DIVISION. 000011 FILE SECTION. 000012 FD FILE-1. 000013 01 REC-1 PIC X(80). 000014 WORKING-STORAGE SECTION. 000015 77 REL-KEY PIC 99. 000016 77 KEY-DATA PIC XX. 000017 PROCEDURE DIVISION. 000018 START FILE-1 KEY IS = KEY-DATA. 000019 STOP RUN.
C3169.cob 18: JMN3169I-S 相対ファイルに対するSTART文のKEY指定には，RELATIVE KEY句で指定した項目以外は記述できません．
