# Trouble with UDC

**URL:** <https://forum.u4ria.org/t/trouble-with-udc/690>\
**Category:** OSeMOSYS\
**Created:** [August 20, 2026, 11:19am UTC](https://forum.u4ria.org/t/trouble-with-udc/690 "2026-08-20T11:19:39Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![CorentinAmi](https://avatars.discourse-cdn.com/v4/letter/c/3da27b/32.png) [@CorentinAmi](https://forum.u4ria.org/u/CorentinAmi)\
**Post date:** [August 20, 2026, 11:19am UTC](https://forum.u4ria.org/t/trouble-with-udc/690/1 "2026-08-20T11:19:39Z")

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Hello, I am trying to set an UDC, but I cannot change the name, for Example ReserveMargin. Is it something I am missing? I do click on ‘update model’ after editing the name, but the change is not applied, and I am stuck with the randomly generated name.

Appart from that the UDC works fine.

Best

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**Author:** ![Fernando\_Plazas](https://avatars.discourse-cdn.com/v4/letter/f/8e7dd6/32.png) [@Fernando\_Plazas](https://forum.u4ria.org/u/Fernando_Plazas)\
**Post date:** [August 20, 2026, 8:28pm UTC](https://forum.u4ria.org/t/trouble-with-udc/690/2 "2026-08-20T20:28:24Z")

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Dear @CorentinAmi, this is a bug that is expected to be fixed in the next release, version 5.7. For now, you need to keep the random name. It does not affect the results.

Kind regards,

Fernando