# Polyscope boot screen freezes on v3.12 (CB3.1 robot)

**URL:** <https://forum.universal-robots.com/t/polyscope-boot-screen-freezes-on-v3-12-cb3-1-robot/21546>\
**Category:** Technical Questions\
**Created:** [May 25, 2022, 3:43pm UTC](https://forum.universal-robots.com/t/polyscope-boot-screen-freezes-on-v3-12-cb3-1-robot/21546 "2022-05-25T15:43:31Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![anon55144812](https://avatars.discourse-cdn.com/v4/letter/a/e99b99/32.png) [@anon55144812](https://forum.universal-robots.com/u/anon55144812)\
**Post date:** [May 25, 2022, 3:43pm UTC](https://forum.universal-robots.com/t/polyscope-boot-screen-freezes-on-v3-12-cb3-1-robot/21546/1 "2022-05-25T15:43:31Z")

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Hi,

I’ve been updating Polyscope on our CB3 series UR robot following the suggested procedure : [Universal Robots - LEGACY DOWNLOAD CENTER](https://www.universal-robots.com/articles/ur/documentation/legacy-download-center/) . The reason I did this was to be able to use the Robotiq force sensor with copilot.

I was starting from v3.3, and updated one minor revision at a time. Everything was smooth until I got to v3.12. The pendant now gets stuck while booting at the loading screen on 100%.

Is there any easy solution to fix this? Is the only solution to use a robot image from the legacy download center or is there some other fix?

Cheers,  
Ben