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Debugging and Maintaining COBOL Programs

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Course Description


This course is designed to provide students with the skills to test and debug COBOL programs. Students will test, analyze and debug COBOL programs running under TSO.



Upon completion of the course, students will be able to:
  • Discuss why COBOL programs fail and abends that occur with COBOL programs
  • Recognize how numbers can become corrupted
  • Implement testing strategies
  • Review a dump to identify the failing instruction and the data that caused the failure.


  • Developers


    • Experience coding COBOL programs, as well as TSO and JCL


  • Testing and Debugging COBOL Programs
    • Numbering Systems
      • Decimal
      • Binary
      • Hexadecimal
    • Decimal, Binary, and Hexadecimal Table
    • Testing Strategies
      • Unit Testing
      • System (Integration) Testing
      • Regression Testing
    • Standard Compiler Listing
    • Expanded Compiler Listing
    • Usefulness of listings w/Abends
    • A 7 Step Abend Solving Methodology
    • System Abends
    • Common System Abend Codes
      • S001
      • S013
      • S0Cn
      • S213
      • S913
      • SB37
      • SC37
      • SD37
      • SE37
      • S806
    • Common User Abend Codes
      • U1020
      • U1035
      • U1037
      • U1018
      • U4038
    • Deliberately Abending a Program with ILBOABN0
    • Analyze a dump generated because of a S0C7 abend
    • JES Job Log Notes
    • Summary and Review
    • Exercise
  • Debugging Derby
    • Students will work in teams or individually to identify and fix 8 COBOL programs with bugs in them
  • 2020 Top 20 Training Industry Company - IT Training

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