HPE NonStop Inspect is the primary symbolic, source-level debugger for applications running on the HPE NonStop (formerly Tandem) operating system. It allows developers to interactively control program execution, examine and change data variables, and debug complex multi-process applications in both the Guardian and Open System Services (OSS) environments. 

Program Summary

The Inspect debugger family facilitates high-availability software development through several specialized versions: 

• Inspect (Legacy): A command-line tool for TNS, TNS/R, and TNS/E systems.
• Native Inspect (eInspect/xInspect): Adapted from GDB for Itanium and x86 architectures; it provides a command-line interface with scripting capabilities.
• Visual Inspect: A Windows-hosted GUI debugger that provides “point-and-click” efficiency for setting breakpoints and displaying variables.
• NSDEE (Eclipse): Modern debugging integrated into the Eclipse-based development environment, supporting NonStop Application, Attach Process, and Snapshot debug configurations. 

Historic Timeline by Era

The evolution of the NonStop debugger mirrors the platform’s hardware transitions over five decades.

The Tandem Era (1974 – 1997) 

• 1974: Tandem Computers is founded; the platform begins with T/16 (NonStop I).
• 1980s: Inspect is introduced as the standard interactive debugger for the TNS (Tandem Network Strategy) CISC architecture.
• Early 1990s: Migration to MIPS-based TNS/R systems; Inspect is updated to support RISC instruction sets and optimized compilers. 

The Compaq & Early HP Era (1997 – 2014)

• 1997: Compaq acquires Tandem.
• 2002: HP acquires Compaq; migration to TNS/E (Intel Itanium) architecture begins.
• 2005 – 2010: Visual Inspect becomes a staple for developers seeking a GUI experience on Windows.
• 2013: Release of the Inspect H01 Manual, documenting full support for TNS/R and TNS/E concurrent debugging. 

The Modern HPE Era (2014 – Present)

• 2014: Introduction of NonStop X (x86-64 architecture). Native Inspect (xInspect) is launched, based on GDB, to support the move away from Itanium.
• 2015: HPE is formed; focus shifts to the NonStop Development Environment for Eclipse (NSDEE).
• 2020 – 2024: Enhancements in NSDEE include improved OSS process handling and support for large-scale application debugging.
• 2025: HPE celebrates 50 years of NonStop; updates to the OS introduce greater development and debugging flexibility for named processes on NS5 X5 and NS9 X5 platforms. 

Future Outlook

HPE’s roadmap for NonStop focuses on modernisation through tradition, ensuring that legacy tools like Inspect remain compatible while transitioning to cloud-native and virtualized environments. 

• Virtualized NonStop (vNS): Debugging tools are being adapted to work seamlessly within enterprise private clouds and HPE GreenLake consumption models.
• AI Integration: Future enhancements likely include AI-driven diagnostics and automation within the debugger infrastructure to manage the complexity of modern REST/JSON API gateways and Kafka messaging buses.

HPE NonStop Inspect debugger Overview and timeline by year