# Users Q&A

**URL:** https://gemseo.discourse.group/c/users-q-a/7.md

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## [About the Users Q&A category](https://gemseo.discourse.group/t/about-the-users-q-a-category/14)

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**Author:** [@gilberto.ruiz](https://gemseo.discourse.group/u/gilberto.ruiz)\
**Replies:** 0\
**Last updated:** [October 10, 2025, 11:49am UTC](https://gemseo.discourse.group/t/about-the-users-q-a-category/14 "2025-10-10T11:49:44Z")

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Share your questions about GEMSEO® and/or help other users by answering questions you know the answer to.

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## [Saving optimization metadata when saving optimization history](https://gemseo.discourse.group/t/saving-optimization-metadata-when-saving-optimization-history/37)

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**Author:** [@Axel](https://gemseo.discourse.group/u/Axel)\
**Replies:** 3\
**Last updated:** [June 11, 2026, 8:21am UTC](https://gemseo.discourse.group/t/saving-optimization-metadata-when-saving-optimization-history/37 "2026-06-11T08:21:31Z")

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As I understand it, the most straightforward way to save the results from an executed scenario is to save it as an HDF5 like so: my\_scenario.save\_optimization\_history() or saving the dataset directly with my\_scenario.to\_…

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## [Scenario of a nested DOE](https://gemseo.discourse.group/t/scenario-of-a-nested-doe/33)

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**Author:** [@SebastienBocquet](https://gemseo.discourse.group/u/SebastienBocquet)\
**Replies:** 5\
**Last updated:** [February 17, 2026, 2:41pm UTC](https://gemseo.discourse.group/t/scenario-of-a-nested-doe/33 "2026-02-17T14:41:33Z")

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Hi, I would like to run two nested DOE: one custom doe, and for each evaluation, another DOE is run: loop on x1 with CustomDOE, where x1 values are given in a dataset: loop on x2 with a Latin Square DOE, speicifed …