This document summarizes a presentation about migrating COBOL programs to version 5 and beyond. The presentation discusses what is new in COBOL 5, why migrations are difficult, and provides suggestions and best practices for testing programs during migration. It recommends attending other sessions at the conference on mainframe application development and DevOps.

1. World®
’16
Migrating to COBOL 5
and Beyond
Michael DuBois, CA Technologies
MFX54E
MAINFRAME

2. 2 © 2016 CA. ALL RIGHTS RESERVED.@CAWORLD #CAWORLD
© 2016 CA. All rights reserved. All trademarks referenced herein belong to their respective companies.
The content provided in this CA World 2016 presentation is intended for informational purposes only and does not form any type of
warranty. The information provided by a CA partner and/or CA customer has not been reviewed for accuracy by CA.
For Informational Purposes Only
Terms of this Presentation

3. 3 © 2016 CA. ALL RIGHTS RESERVED.@CAWORLD #CAWORLD
Abstract
As customers migrate to COBOL 5 and beyond, attend this educational
session to learn common tips and tricks for mainframe system admins
and programmers of CA Testing Tools and CA Endevor® Software Change
Manager
Michael
DuBois
CA Technologies
VP, Product
Management

4. 4 © 2016 CA. ALL RIGHTS RESERVED.@CAWORLD #CAWORLD
Migrating to COBOL 5 and Beyond
Agenda
WHAT’S NEW WITH COBOL V5?
WHY IS MIGRATING HARD?
SUGGESTIONS AND BEST PRACTICES
QUESTIONS?
1
2
3
4

5. 5 © 2016 CA. ALL RIGHTS RESERVED.@CAWORLD #CAWORLD
What’s New With COBOL 5?
§ Internal Improvements
– More memory, more time, more work data sets
– Better results
§ New Compiler Options
– Architecture exploitation
§ OMVS requirement
§ Program objects
§ Minor syntax changes / improvements
§ Internal runtime control blocks

6. 6 © 2016 CA. ALL RIGHTS RESERVED.@CAWORLD #CAWORLD
Why is migrating hard?
§ Roadblocks
– OS/VS COBOL
– COBOL II NORES
– AMODE(24)
§ PDSEs
§ Aggressive testing required
– Invalid programs and data

7. 7 © 2016 CA. ALL RIGHTS RESERVED.@CAWORLD #CAWORLD
Suggestions and Best Practices
§ Before you start
– Latest and Greatest
§ COBOL
§ Language Environment
§ Binder
§ Subsystems (CICS, DB2, etc.)
§ Software Change Manager
§ Any executables that might be “COBOL aware”
– Migration Guide
– Tuning Guide

8. 8 © 2016 CA. ALL RIGHTS RESERVED.@CAWORLD #CAWORLD
Suggestions and Best Practices
§ Before you start
– SCM
§ JCL and PROC updates
§ Compile options at each promotion stage
§ (more later)
– PDSE Conversion
– Locate all OS/VS COBOL programs
§ IGZ0268W / IGZ0269W
§ CAOUMRS

9. 9 © 2016 CA. ALL RIGHTS RESERVED.@CAWORLD #CAWORLD
Suggestions and Best Practices
CAOUMRS
CA WORLD 2016 LOAD LIBRARY ANALYSIS: DETAIL
CA SYMDUMP BATCH r9.1 1005ARX00 DAVSC01.OSVS.LOAD (WRKD01)
LEGEND FOR OPTIMIZER OPTIONS:
D=DTECT C=XCOUNT X=XTIME P=PFLOW S=SUBRNGCK R=PARMCHK B=DBGSLEEP F=FDCHECK W=WSI
MODULE MODULE-SIZE CSECT CSECT-SIZE PROC-SIZE DATA-SIZE COMPILER-ID REL DATE
CAMRCOBB 10,104 CAMRCOBB 6,948 2,368 4,580 CZOS 5655-G53 4.0 03/07/2008
CRE8RELF 6,384 CRE8RELF 6,384 3,312 3,072 VSR1 5740-CB1 2.4 08/31/1998
DISPLAYC 1,640 DISPLAYC 1,634 364 1,270 VSR1 5740-CB1 2.4 03/29/1999
EDDIE 2,608 EDDIE 2,608 1,164 1,444 VSR1 5740-CB1 2.4 09/06/2001
RECUR 4,832 RECUR 1,676 520 1,156 CZOS 5655-G53 4.0 06/05/2006
TOTALS: 25,568 19,250 7,728 11,522

10. 10 © 2016 CA. ALL RIGHTS RESERVED.@CAWORLD #CAWORLD
Suggestions and Best Practices
Testing: Invalid Data
Usage Display
77 USAGE1 PIC X(4) VALUE ’00 0’. <* x’F0F040F0’, notice the third byte.
77 USAGE1-RD REDEFINES USAGE1 PIC 9(4). <* not valid in
<* PIC 9 USAGE DISPLAY
Comparing USAGE1-RD causes problems
ZONEDATA and NUMPROC options decisions

11. 11 © 2016 CA. ALL RIGHTS RESERVED.@CAWORLD #CAWORLD
Suggestions and Best Practices
Testing: Occurs Depending On
01 TBLSIZE PIC 9(5) BINARY.
01 MY-TABLE.
02 TABLE OCCURS 0 TO 1 TIMES DEPENDING ON TBL-SIZE.
05 MY-FIELD PIC X(1).
01 TRAILING-AREA PIC X(500).
MOVE 100 TO TBLSIZE. *> Legal if table not referenced
MOVE ALL ‘X' TO MY-TABLE. *> Illegal, ODO object not in range

12. 12 © 2016 CA. ALL RIGHTS RESERVED.@CAWORLD #CAWORLD
Suggestions and Best Practices
Testing: Overpopulated Data Items
01 X PIC X(2).
01 Y REDEFINES X PIC 9(2) PACKED-DECIMAL.
…
MOVE x'123F' TO X.
MOVE Y TO ANOTHER-DATA-ITEM.

13. 13 © 2016 CA. ALL RIGHTS RESERVED.@CAWORLD #CAWORLD
Suggestions and Best Practices
§ Finding invalid COBOL statements can be hard!
– Compile with debugging in mind
§ SSRANGE
§ OPT(0)
§ OPT(n)
– Compile with options closer to production
§ NOSSRANGE
§ ARCH(n)
§ OPT(n) ?
§ STGOPT ?
Test, Test, Test!

14. 14 © 2016 CA. ALL RIGHTS RESERVED.@CAWORLD #CAWORLD
Suggestions and Best Practices
Using STATIC Map
01 TASK-STRUCTURE. 0CL43
03 TASK-CNTL PIC X(4) VALUE 'CORE'. 000000000 4C
03 TASK-SWITCH PIC X. 000000004 1C
03 TASK-SWITCH2 PIC 99. 000000005 2C
03 TASK-SWITCH3 PIC X. 000000007 1C
03 TASKNUM PIC S9(5) COMP-3. 000000008 3P

15. 15 © 2016 CA. ALL RIGHTS RESERVED.@CAWORLD #CAWORLD
Suggestions and Best Practices
Using STATIC Map
* * * * * S T A T I C M A P * * * * *
OFFSET (HEX) LENGTH (HEX) NAME
0 4 BLF_Ptrs
4 4 BLL_Ptrs
8 C BLT_Ptrs
…
308 2B TASK-STRUCTURE

16. 16 © 2016 CA. ALL RIGHTS RESERVED.@CAWORLD #CAWORLD
Recommended Sessions
SESSION # TITLE DATE/TIME
MFX112S
Roadmap Session: Mainframe Application Development
Portfolio Review
11/16/2016 at 12:45 pm
MFT148S
Roadmap Session: Achieve DevOps on the Mainframe for
Faster Time to Market
11/16/2016 at 4:30 pm
MFX110V
Mainframe Application Modernization for Enterprise
Developers [FACET]
11/17/2016 at 1:45 pm

17. 17 © 2016 CA. ALL RIGHTS RESERVED.@CAWORLD #CAWORLD
Must See Demos
Continuous Development and
Testing
Mainframe Theater
Modern Application
Development
Mainframe Theater

18. 18 © 2016 CA. ALL RIGHTS RESERVED.@CAWORLD #CAWORLD
Questions?

19. 19 © 2016 CA. ALL RIGHTS RESERVED.@CAWORLD #CAWORLD
Thank you.
Stay connected at communities.ca.com

20. @CAWORLD #CAWORLD © 2016 CA. All RIGHTS RESERVED.20 @CAWORLD #CAWORLD
Mainframe and Workload Automation
For more information please visit ca.com/appdev
Michael DuBois
VP, Product Management
michael.dubois@ca.com