例題
[C3145.cob] 000001 IDENTIFICATION DIVISION. 000002 PROGRAM-ID. C3145. 000003 ENVIRONMENT DIVISION. 000004 INPUT-OUTPUT SECTION. 000005 FILE-CONTROL. 000006 SELECT FILE-1 ASSIGN TO SYS001 000007 ORGANIZATION IS INDEXED 000008 ACCESS MODE IS SEQUENTIAL 000009 RECORD KEY IS KEY-REC. 000010 DATA DIVISION. 000011 FILE SECTION. 000012 FD FILE-1. 000013 01 REC-1. 000014 02 KEY-REC PIC XX. 000015 02 FILLER PIC X(78). 000016 PROCEDURE DIVISION. 000017 READ FILE-1 KEY IS KEY-REC. 000018 STOP RUN.
C3145.cob 17: JMN3145I-S READ文のKEY指定は，乱呼出しの索引ファイル以外のファイルに記述できません．KEY指定は，無効になります．
