# Upgrade software of CB3 controller "a fatal error has occured in update script"

**URL:** <https://forum.universal-robots.com/t/upgrade-software-of-cb3-controller-a-fatal-error-has-occured-in-update-script/25042>\
**Category:** Technical Questions\
**Created:** [November 16, 2022, 9:17am UTC](https://forum.universal-robots.com/t/upgrade-software-of-cb3-controller-a-fatal-error-has-occured-in-update-script/25042 "2022-11-16T09:17:27Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![thachdovan](https://avatars.discourse-cdn.com/v4/letter/t/71e660/32.png) [@thachdovan](https://forum.universal-robots.com/u/thachdovan)\
**Post date:** [November 16, 2022, 9:17am UTC](https://forum.universal-robots.com/t/upgrade-software-of-cb3-controller-a-fatal-error-has-occured-in-update-script/25042/1 "2022-11-16T09:17:27Z")

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I’m trying to upgrade sw from 3.5 to 3.6 for a UR5.  
The installation looks ok until

 ![image](https://us1.discourse-cdn.com/flex020/uploads/universal_robots/original/2X/7/75e8ccf1a16ce6f834686f26cd0286652b2eaec1.jpeg)  
How can I solve this issue?

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**Author:** ![anon25731893](https://avatars.discourse-cdn.com/v4/letter/a/ec9cab/32.png) [@anon25731893](https://forum.universal-robots.com/u/anon25731893)\
**Post date:** [March 8, 2023, 6:40pm UTC](https://forum.universal-robots.com/t/upgrade-software-of-cb3-controller-a-fatal-error-has-occured-in-update-script/25042/2 "2023-03-08T18:40:30Z")

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Same problem ☹  
i cant run the program…

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**Author:** ![anon25731893](https://avatars.discourse-cdn.com/v4/letter/a/ec9cab/32.png) [@anon25731893](https://forum.universal-robots.com/u/anon25731893)\
**Post date:** [June 19, 2023, 12:18pm UTC](https://forum.universal-robots.com/t/upgrade-software-of-cb3-controller-a-fatal-error-has-occured-in-update-script/25042/3 "2023-06-19T12:18:48Z")

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Hi i am having a problem with my ur10 cb3,when im trying to start it,a fault appears  
SafetyA:C192A20:Safety system fault:SPI output error detected  
Explanation;  
Powersupply for the I/O is not detected  
how do I fix it?  
Thank you