# Old Software doen't work completely

**URL:** <https://forum.universal-robots.com/t/old-software-doent-work-completely/24600>\
**Category:** General Application Help: How do I?\
**Created:** [October 25, 2022, 9:57am UTC](https://forum.universal-robots.com/t/old-software-doent-work-completely/24600 "2022-10-25T09:57:56Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![anon81043084](https://avatars.discourse-cdn.com/v4/letter/a/85f322/32.png) [@anon81043084](https://forum.universal-robots.com/u/anon81043084)\
**Post date:** [October 25, 2022, 9:57am UTC](https://forum.universal-robots.com/t/old-software-doent-work-completely/24600/1 "2022-10-25T09:57:56Z")

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Hello, can someone help me with this Problem? My URSim is software version 5.12 and my UR5e Robot is 5.12

**Programs written in the version before 3.0 may not work as expected. Run them with caution.**

Thank you for your help

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<div class="post-metadata">

**Author:** ![miwa](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.universal-robots.com/miwa/32/2986_2.png) [@miwa](https://forum.universal-robots.com/u/miwa)\
**Post date:** [October 27, 2022, 10:56am UTC](https://forum.universal-robots.com/t/old-software-doent-work-completely/24600/2 "2022-10-27T10:56:59Z")

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This is just stating that old CB2 robot programs written in Polyscope 2.x software versions will require major changes to run on new robots.

You’ll have minimal issues running 5.x and 3.x programs in the 5.12 simulator depending on how old the original program is.