# Upgrading suite to vn12.0 **URL:** https://cms-helpdesk.ncas.ac.uk/t/upgrading-suite-to-vn12-0/299 **Category:** Unified Model **Tags:** ARCHER2 **Created:** [10 November 2021 09:34 UTC](https://cms-helpdesk.ncas.ac.uk/t/upgrading-suite-to-vn12-0/299 "2021-11-10T09:34:15Z") **Posts on this page:** 1 **Showing post:** 4
### Author: ![dcase](https://dub1.discourse-cdn.com/flex013/user_avatar/cms-helpdesk.ncas.ac.uk/dcase/32/468_2.png) [@dcase](https://cms-helpdesk.ncas.ac.uk/u/dcase) #### Post date: [10 November 2021 10:25 UTC](https://cms-helpdesk.ncas.ac.uk/t/upgrading-suite-to-vn12-0/299/4 "2021-11-10T10:25:26Z")
Simon’s branch uses gcom 7.4, but UM12 would ideally want 7.5 (although it should be slightly backwards compatible with 7.4 …). I would first remove the extra branch, and make sure the macro is run fully. If you’ve tried this (with Cray compiler env 10 - because there can be bugs with the c code for shumlib in 11) then let me know and I’ll try to look more closely at your suite this afternoon. P.S. If I want to upgrade a suite, I use cd [your suite] rose macro --fix cd app/um rose app-upgrade vn12.0 (or whatever) cd …/fcm\_make rose app-upgrade vn12.0 in case that helps… --- _[View the full topic](https://cms-helpdesk.ncas.ac.uk/t/upgrading-suite-to-vn12-0/299)._