OpenModelica/OpenModelica
Oct 2024 – Oct 2025
8 Months active
Languages Used
C++CMakeModelicaMakefileQMLC
Technical Skills
Build SystemCode RefactoringFMU ExportPath ManagementBuild SystemsC++
arun3688
PROFILE
Arun3688
Over eight months, Rain100falls contributed to OpenModelica/OpenModelica by engineering robust solutions for FMU export, simulation reliability, and data reconciliation. They addressed complex build system challenges using C, C++, and Modelica, such as stabilizing FMU packaging through hashed directory paths and Makefile-based workflows. Their work improved metadata compliance, cross-platform solver integration, and error handling in simulation runtimes. By implementing URI path resolution and enhancing test coverage, Rain100falls reduced export-time errors and improved reproducibility. Their technical approach emphasized maintainability and traceability, with targeted bug fixes and features that strengthened the reliability of model export, simulation, and data ingestion processes.
Overall Statistics
Feature vs Bugs
53%Features
Repository Contributions
16Total
Bugs
7
Commits
16
Features
8
Lines of code
1,013
Activity Months8
Your Network
11 people
Work History
October 2025
1 Commits
Oct 1, 2025October 2025 monthly summary for OpenModelica/OpenModelica: Delivered robustness enhancements for time-event handling when states or event indicators may be missing, and added end-to-end validation with a new test model sinus.mos. These changes reduce runtime errors, improve model export/simulation reliability, and bolster user confidence in edge cases. Major bug fix: prevent errors during time events when no states/indicators are defined. Tech stack and practices demonstrated: Modelica runtime checks, test-driven development, and regression testing, with clear commit history for traceability.
1 Commits
Oct 1, 2025October 2025 monthly summary for OpenModelica/OpenModelica: Delivered robustness enhancements for time-event handling when states or event indicators may be missing, and added end-to-end validation with a new test model sinus.mos. These changes reduce runtime errors, improve model export/simulation reliability, and bolster user confidence in edge cases. Major bug fix: prevent errors during time events when no states/indicators are defined. Tech stack and practices demonstrated: Modelica runtime checks, test-driven development, and regression testing, with clear commit history for traceability.
October 2025
June 2025
4 Commits • 2 Features
Jun 1, 2025June 2025 monthly summary for OpenModelica/OpenModelica: Focused on reliability, traceability, and test robustness across data reconciliation, model file handling, and simulation validation. Implemented fixes and features that improve multi-run reliability, reporting accuracy, and test efficiency, delivering measurable business value and technical improvements for reproducibility and maintainability.
June 2025
4 Commits • 2 Features
Jun 1, 2025June 2025 monthly summary for OpenModelica/OpenModelica: Focused on reliability, traceability, and test robustness across data reconciliation, model file handling, and simulation validation. Implemented fixes and features that improve multi-run reliability, reporting accuracy, and test efficiency, delivering measurable business value and technical improvements for reproducibility and maintainability.
May 2025
1 Commits • 1 Features
May 1, 2025May 2025 monthly summary for OpenModelica/OpenModelica: Focused on boosting data ingestion robustness by enabling URI path resolution and hardening data reconciliation for URI-based inputs. This work reduces input errors, enhances reliability of data loading, and supports URI-formatted inputs in production environments.
1 Commits • 1 Features
May 1, 2025May 2025 monthly summary for OpenModelica/OpenModelica: Focused on boosting data ingestion robustness by enabling URI path resolution and hardening data reconciliation for URI-based inputs. This work reduces input errors, enhances reliability of data loading, and supports URI-formatted inputs in production environments.
May 2025
April 2025
3 Commits • 3 Features
Apr 1, 2025Concise monthly summary for 2025-04 focused on delivering robust FMU packaging and maintaining external dependencies in OpenModelica/OpenModelica. The month prioritized improving FMU build reliability, enhancing cross-platform solver integration, and aligning external dependencies to support downstream usage and model exchange.
April 2025
3 Commits • 3 Features
Apr 1, 2025Concise monthly summary for 2025-04 focused on delivering robust FMU packaging and maintaining external dependencies in OpenModelica/OpenModelica. The month prioritized improving FMU build reliability, enhancing cross-platform solver integration, and aligning external dependencies to support downstream usage and model exchange.
March 2025
1 Commits
Mar 1, 2025Month: 2025-03 — OpenModelica/OpenModelica focused on correctness and stability of FMU-based CVODE simulations. A key bug fix addressed the propagation of the current state values within the CVODE right-hand side function, preventing incorrect values from y into localData and ensuring accurate subsequent calculations in FMU simulations. This work enhances reliability for users relying on CVODE-based FMUs and reduces downstream model drift.
1 Commits
Mar 1, 2025Month: 2025-03 — OpenModelica/OpenModelica focused on correctness and stability of FMU-based CVODE simulations. A key bug fix addressed the propagation of the current state values within the CVODE right-hand side function, preventing incorrect values from y into localData and ensuring accurate subsequent calculations in FMU simulations. This work enhances reliability for users relying on CVODE-based FMUs and reduces downstream model drift.
March 2025
December 2024
2 Commits
Dec 1, 2024December 2024: FMI export and FMU packaging stabilization for OpenModelica. Focused on fixing high-impact export/interoperability issues and strengthening the FMU build process. Key features delivered include robust FMI export handling for RealFFT and ensured FMU headers are correctly included in builds. Enhanced test coverage (RealFFT1) to guard against regressions. Business value includes fewer export-time errors, smoother FMU generation, and improved interoperability with downstream tools.
December 2024
2 Commits
Dec 1, 2024December 2024: FMI export and FMU packaging stabilization for OpenModelica. Focused on fixing high-impact export/interoperability issues and strengthening the FMU build process. Key features delivered include robust FMI export handling for RealFFT and ensured FMU headers are correctly included in builds. Enhanced test coverage (RealFFT1) to guard against regressions. Business value includes fewer export-time errors, smoother FMU generation, and improved interoperability with downstream tools.
November 2024
3 Commits • 2 Features
Nov 1, 2024In November 2024, the OpenModelica/OpenModelica work focused on stabilizing FMU export workflows, enriching export metadata, and hardening resource export/import paths. Key improvements enhance build control, metadata compliance, and runtime interoperability while reducing crash risk for end users.
3 Commits • 2 Features
Nov 1, 2024In November 2024, the OpenModelica/OpenModelica work focused on stabilizing FMU export workflows, enriching export metadata, and hardening resource export/import paths. Key improvements enhance build control, metadata compliance, and runtime interoperability while reducing crash risk for end users.
November 2024
October 2024
1 Commits
Oct 1, 2024Month 2024-10: Stabilized the FMU export workflow in OpenModelica by addressing a path-length issue that caused build failures. Implemented a hashing-based approach to generate short, stable temporary directories based on model names, ensuring reliable FMU exports across environments and CI pipelines.
October 2024
1 Commits
Oct 1, 2024Month 2024-10: Stabilized the FMU export workflow in OpenModelica by addressing a path-length issue that caused build failures. Implemented a hashing-based approach to generate short, stable temporary directories based on model names, ensuring reliable FMU exports across environments and CI pipelines.
Activity
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Quality Metrics
Correctness83.2%
Maintainability81.2%
Architecture77.4%
Performance70.6%
AI Usage20.0%
Skills & Technologies
Programming Languages
CC++CMakeMakefileModelicaQML
Technical Skills
Build SystemBuild System ConfigurationBuild SystemsCC ProgrammingC++C++ DevelopmentC/C++ DevelopmentCode GenerationCode RefactoringCompiler BackendCompiler DevelopmentData ReconciliationFMI ExportFMU Export
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