# C271A1 Error during thread

**URL:** <https://forum.universal-robots.com/t/c271a1-error-during-thread/22222>\
**Category:** Technical Questions\
**Created:** [June 24, 2022, 4:09pm UTC](https://forum.universal-robots.com/t/c271a1-error-during-thread/22222 "2022-06-24T16:09:59Z")\
**Posts on this page:** 1\
**Showing post:** 7

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**Author:** ![guillermojose.belda](https://avatars.discourse-cdn.com/v4/letter/g/c2a13f/32.png) [@guillermojose.belda](https://forum.universal-robots.com/u/guillermojose.belda)\
**Post date:** [October 17, 2024, 7:56am UTC](https://forum.universal-robots.com/t/c271a1-error-during-thread/22222/7 "2024-10-17T07:56:15Z")

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I have just got the same error after introducing a non related change. **Solved after adding sync() at the end of each Thread**

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