Sounds like an old S/36 flat file.  Here is an example of a LF we have over a retired AR Detail file.  (Thank God for archiving old source)
Try this: (of course change the fields as required.)
A          R ARRDTL01                  TEXT('A/R DETAIL TYPE 4')
 A                                      PFILE(CR.ARDTL)          
  * DEFINE FIELDS                                                
 A            F00001                                             
 A            KSTORE             I      SST(F00001 001 7)        
 A            KTYPE              I      SST(F00001 024 1)        
  * TRANSACTION DATE / YYMMDD                                    
 A            KTRNDT             I      SST(F00001 031 6)        
  * KEYS                                                         
 A          K KSTORE                                             
 A          K KTRNDT                    DESCEND                  
  * RECORD SELECTION                                             
 A          S KTYPE                     COMP(EQ '4')             
Chris Bipes
Director of Information Services
CrossCheck, Inc.
-----Original Message-----
From: MIDRANGE-L <midrange-l-bounces@xxxxxxxxxxxx> On Behalf Of Alan Shore
Sent: Friday, July 13, 2018 1:29 PM
To: midrange-l@xxxxxxxxxxxx
Subject: Creating a logical over a physical that has no DDS
Hi everyone
We are on V7r1
We have a physical file that was created without a DDS
CRTPF FILE(library/filename) RCDLEN(500)
With multiple members
The contents of the records in this file, has a certain layout
The first character is a record type
Characters 2 through 11 is an order number
Line number is characters 12 through 16
Etc.
I tried creating a LF DDS using SST over the record name - but its just not working
Is there a way to create a logical over this file with the record type and/or order number as a key?
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