> For the complete documentation index, see [llms.txt](https://docs.enercalc.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.enercalc.com/sel-installation-activation/licensing-and-legal/build-12-limitations-2.md). # RetainPro Mode Limitations Understand which features are available in RetainPro mode versus the full subscription version of ENERCALC SEL. The latest available build of ENERCALC SEL is available as a subscription only. However, it is capable of operating in “RetainPro Mode” to allow usage by RetainPro users with active Maintenance & Support Plans or current subscriptions. RetainPro mode does have at its core: * The extensive rewrite of most internal program code * Newly designed user interface * Reporting improvements * Speed improvements in both user interface management and calculations * Multi-core processor usage * Activation system improvements including extensive awareness of internet security * Improvements to 3D image rendering * Ability to change load combinations in an entire project file with one selection * New 16+ million data point internal database of USGS Ss & S1 seismic values contained in their latest databases * New RPN Calculator that “tears off” of our user interface and can remain open while working in SEL * Extensive internal debug utilities that can be turned on and off by ENERCALC support engineers during TeamViewer & similar screen sharing sessions The ***full version*** of the latest build has a number of extra components and capabilities not accessible in RetainPro mode: * Local & Cloud usage with project file synchronization * QuickCalc capability Referenced on Projects Tab * [ENERCALC 3D FEM](https://docs.enercalc.com/e3d-user-manual/) * [Steel Base Plate by FEM](https://docs.enercalc.com/sel-user-manual/calculation-modules/miscellaneous/steel-base-plate-fem) * [General Footing by FEM](https://docs.enercalc.com/sel-user-manual/calculation-modules/foundation/generalfooting) * [Flitch Plated Wood Beam](https://docs.enercalc.com/sel-user-manual/calculation-modules/beams/flitch-plated-wood-beam) * AutoDesk Revit Integration – Live 2 way analysis & design of building components * Future enhancements and maintenance after MSP has expired --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://docs.enercalc.com/sel-installation-activation/licensing-and-legal/build-12-limitations-2.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.