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Arius

Please note that Arius will not install and run unless you have been granted a license. Administrator privileges on your computer are required in order to install Arius (see installation notes for details).

Current release: Arius 2025a, October 2025

Prerequisites: None. This release is a complete system.

Download 2025a

Installation & Release Notes

The 2025a release includes a range of fixes and usability improvements across Arius Deterministic, Arius Enterprise, and Triangles on Demand.

Key updates include corrections to Historical Array calculations when exposure periods are removed, improved stability when saving large projects, and resolution of intermittent load errors in Arius Enterprise projects. Triangles on Demand now properly supports drill-downs in all cases when using triangles from secondary databases.

Deterministic-only licenses and Stochastic as a Service users no longer require a MATLAB Runtime installation in version 2025a.

For full details, refer to the 2025a Installation & Release Notes.

Prior release: Arius 2023b, April 2024

Prerequisites: None. This release is a complete system.

Download 2023b

Installation notes

April 2024 update: The April release of 2023b is an update to a prior build of the same version. We resolved an issue for specific Arius Enterprise clients who were required to select their browser certificate during the authentication process to connect to Arius desktop.

Please note that the installation notes are unchanged from the prior release.

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