# How to change RW version of S4C+

**URL:** <https://tech-community.robotics.abb.com/t/how-to-change-rw-version-of-s4c/10956>\
**Category:** RobotStudio\
**Created:** [December 7, 2022, 2:03pm UTC](https://tech-community.robotics.abb.com/t/how-to-change-rw-version-of-s4c/10956 "2022-12-07T14:03:17Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Ekas](https://avatars.discourse-cdn.com/v4/letter/e/90ced4/32.png) [@Ekas](https://tech-community.robotics.abb.com/u/Ekas)\
**Post date:** [December 7, 2022, 2:03pm UTC](https://tech-community.robotics.abb.com/t/how-to-change-rw-version-of-s4c/10956/1 "2022-12-07T14:03:17Z")

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Hello,  
We are using S4C+ controller and there is two different error system failure and enable open.There is no any hardware problem, I checked. I’m thinking about there is a RW version problem.Now, I want to downgrade RW version from 1.80 to 1.14 or etc. but I dont know how can I do it with robinstall. I want to downgrade because I changed CPU board with old version.  
Thank you.  
Best Regards.