Professional training – Mainframe & Legacy Systems
REXX
Get confident with REXX in 6 hours: focus on Syntax, variables and stems, Control structures and functions and String and parsing instructions, live with a trainer, online or on-site.
- Duration
- 6 hours, one session
- Level
- Intermediate
- Format
- Online or on-site
- Language
- German or English
- Certificate
- Certificate of attendance
Overview
“REXX” is designed for roles such as Developers and system programmers in mainframe environments and Career changers and new hires for legacy operations. In 6 hours you work your way through Syntax, variables and stems, Control structures and functions and String and parsing instructions in a structured way – with plenty of practice and time for your questions.
Mainframes and long-established legacy applications still process business-critical transactions in banks, insurers, industry and public administration. Expertise is scarce, yet these systems must be operated, secured and modernized step by step. Our REXX courses are aimed at beginners, developers and operations teams who want to master existing systems with confidence or move them into new architectures. We work hands-on in a provided lab environment with real exercises, troubleshooting and typical production tasks. The course runs online or on site, lasts one day and is offered at a fixed price per participant.
The course is delivered live – either online in a virtual classroom or on-site in our training rooms in Munich, Salzburg, Berlin, Augsburg, Hanover, Bremen, Stuttgart and Kaiserslautern. We can also run it exclusively for your team.
Focus areas of the course
Who is this course for?
- Developers and system programmers in mainframe environments
- Career changers and new hires for legacy operations
- Operators, administrators and security officers
- Architects and project managers for modernization programs
What you will be able to do
- You know the key topics of REXX – Syntax, variables and stems, Control structures and functions, String and parsing instructions, Access to TSO and ISPF, Reading and writing datasets with EXECIO and Error handling and tracing – and can apply them in practice.
- You understand the concepts behind REXX and place them within your system landscape.
- You use REXX confidently and in line with standards in daily work.
- You narrow down REXX faults systematically and fix them quickly.
- You assess the risks, maintainability and modernization options of your existing systems on a sound basis.
Course outline
Module 1 Fundamentals and concepts of REXX
- Key terms, architecture and placement within the mainframe and legacy landscape
- Important objects, file types and tools
- Typical enterprise use cases
- Differences from related technologies and platforms
Module 2 Focus areas: REXX
- Syntax, variables and stems
- Control structures and functions
- String and parsing instructions
- Access to TSO and ISPF
- Reading and writing datasets with EXECIO
- Error handling and tracing
Module 3 Development and configuration
- First steps with REXX using working examples
- Building programs, definitions and parameters cleanly
- Accessing data and neighboring subsystems
- Conventions and standards for maintainable code
Module 4 Operations, security and performance
- Monitoring, logs and evaluating runtime data
- Permissions and hardening according to common requirements
- Spotting bottlenecks and improving run times
- Moving changes into production in a controlled way
Module 5 Troubleshooting and hands-on labs
- Systematic troubleshooting with dumps, logs and diagnostic tools
- Reproducing and fixing typical REXX failure patterns
- Automating recurring tasks
- Case studies and exercises from real production scenarios
Module 6 Transfer to your daily work
- Exercise based on a realistic case
- Typical mistakes and how to avoid them
- Checklist and templates to take away
- Open questions, outlook and resources for further learning
Prerequisites
Entry-level courses require no mainframe knowledge. Advanced courses assume basics of the respective platform or language. Basic knowledge of the topic is helpful.
Technical requirements
Laptop with a current browser and terminal emulator; access to the mainframe or legacy lab environment for REXX is provided by us.
Dates & locations
For every location we suggest a date roughly four weeks ahead. Your preferred date is always possible.
- Munich Wed, 16 December 2026 6 hrs Request
- Salzburg Tue, 15 December 2026 6 hrs Request
- Berlin Mon, 14 December 2026 6 hrs Request
- Augsburg Thu, 10 December 2026 6 hrs Request
- Hanover Wed, 16 December 2026 6 hrs Request
- Bremen Fri, 11 December 2026 6 hrs Request
- Stuttgart Tue, 15 December 2026 6 hrs Request
- Kaiserslautern Mon, 14 December 2026 6 hrs Request
- Online Fri, 11 December 2026 6 hrs Request
Frequently asked questions
Do I need prior knowledge for REXX?
That depends on the level. Entry-level courses assume no mainframe experience, while advanced REXX courses expect basic knowledge of the platform or language. If you are unsure, we are happy to recommend the right starting point in a short pre-call.
Do we work on a real mainframe?
For REXX we provide a lab environment that you access via terminal emulator or browser. That lets you develop and configure safely and provoke failures on purpose. You do not need your own systems, but you are welcome to bring your own questions.
How much does “REXX” cost?
The course costs a flat €949 plus VAT per participant – whether online or on-site. This includes 6 hours of live training with a trainer, course materials, a lab environment and a certificate of attendance.
Can I suggest my own date?
Yes. For every location we suggest a date roughly four weeks ahead. In the request form you can always describe your preferred date or period in free text – we check availability and get back to you within one working day.
Is the course online or on-site?
Both are possible: live online in a virtual classroom or on-site in Munich, Salzburg, Berlin, Augsburg, Hanover, Bremen, Stuttgart and Kaiserslautern. We can also run the course exclusively for your team.
Can the course be tailored to our team?
Yes. Tailor-made courses cost approx. €4,500 more, depending on the topic and by arrangement. We agree content, examples and exercises with you in advance.