# Upgrading from 7.8.5 **URL:** \ **Category:** Ignition\ **Created:** [December 18, 2021, 9:14pm UTC](https://forum.inductiveautomation.com/t/upgrading-from-7-8-5/54276 "2021-12-18T21:14:31Z")\ **Posts on this page:** 1\ **Showing post:** 7
**Author:** ![Matrix\_Engineering](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/matrix_engineering/32/19781_2.png) [@Matrix\_Engineering](https://forum.inductiveautomation.com/u/Matrix_Engineering)\ **Post date:** [December 20, 2021, 2:34pm UTC](https://forum.inductiveautomation.com/t/upgrading-from-7-8-5/54276/7 "2021-12-20T14:34:07Z")
Concur with Phil. “Fail to prepare, prepare to fail”. For 7.8…x to 7.9.x you’re looking at a minimum of one 15 minute outage. Prior to the day planned as per attached PDF, I took a GWBK and ran in a sandbox with 10X testing for a month (10X means, if normally 3K tags, use a script to generate another 27K, if normally 10 clients open, run 100, etc). Contact your IA sales rep and they should assist with a 30-day temp licence for this, or if you are an Integrator, avail of your R&D license. A 7.9.1 to 7.9.18 should be basically the same, in theory should run smoother. A 7.9.18 to 8.1.12 will have a lot more steps and more downtime, requires more testing in the sandbox. [SCADA Upgrade (Redacted) V2.0.1.pdf](https://forum.inductiveautomation.com/uploads/short-url/7WX01hx6YiQLhioH9e47YmjyCmY.pdf) (73.0 KB) --- _[View the full topic](https://forum.inductiveautomation.com/t/upgrading-from-7-8-5/54276)._