COBOL Dumps & Debugging Training

COBOL programming experience as well as skills with TSO/ISPF and JCL.

Experienced COBOL programmers.

On successful completion of this course you will be able to:

• examine and analyse COBOL dumps
• debug COBOL programs
• describe the tools available and their use.

Introduction

• Getting it right: Specification, Design, Writing, Reviews
• Inspection Checklist: Data Errors, Calculation errors, Control-Flow errors, Interface errors, Input/Output errors, Compilation errors, Desk checking.

Using DISPLAY

• Using DISPLAY to trace the logic flow of the program.

FILLERs

• Setting up FILLERs.

Examples of Errors

• Initialisation errors
• Calculation errors
• Control-Flow Errors
• Interface errors: Calling Program, Called Program
• Interface errors
• Input/Output errors

Compiler Options

JESMSGLG & JESYSMSG ABEND Messages

• Interpreting messages
• Popular QSAM Abends: Code 35, Code 39 , Code 46.

ABEND Codes

Checking Codes Inside the Program

• Checking File Status Word
• Using Declaratives.

SYSUDUMP

• SYSDUMP
• Finding the instruction that caused the abend
  • 1 - no called programs involved
  • 2 - called programs.

SYSOUT

• No Call; Sysout Output
• Compiled Listing
• Called Program
• Sysout Output
• SYSOUT and TEST(SYM).

CEEDUMP

• No Call
• CEEDUMP; Compiled Listing
• Called Program
• CEEDUMP - Page 1
• CEEDUMP and TEST(SYM).

ABEND-AID

• Example
• COMPILED LISTING (using LIST)
• COBOL Source
• Example 2
• COMPILED LISTING
• Example 3.

Compiled Listing

• Using Compiled Listing: Compiled listing can be used to check the size of 01 group items, Using Compiled Listing to determine level of conditions.