# RTDE is already in use when using ur-rtde with CB3

**URL:** <https://forum.universal-robots.com/t/rtde-is-already-in-use-when-using-ur-rtde-with-cb3/33583>\
**Category:** Technical Questions\
**Created:** [April 5, 2024, 1:12pm UTC](https://forum.universal-robots.com/t/rtde-is-already-in-use-when-using-ur-rtde-with-cb3/33583 "2024-04-05T13:12:02Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![baejunseo](https://avatars.discourse-cdn.com/v4/letter/b/e99b99/32.png) [@baejunseo](https://forum.universal-robots.com/u/baejunseo)\
**Post date:** [April 5, 2024, 1:12pm UTC](https://forum.universal-robots.com/t/rtde-is-already-in-use-when-using-ur-rtde-with-cb3/33583/1 "2024-04-05T13:12:02Z")

</div>

I’m attempting to remotely control a CB3 UR3 robot using UR-RTDE and Python. However, even after disabling all internet and ProfiNet connections on the UR3, I still encounter an error indicating that RTDE is already in use. If anyone knows a solution, I would appreciate the assistance.

---

<div class="post-metadata">

**Author:** ![benjamin.schmautz](https://avatars.discourse-cdn.com/v4/letter/b/c89c15/32.png) [@benjamin.schmautz](https://forum.universal-robots.com/u/benjamin.schmautz)\
**Post date:** [April 10, 2024, 8:32am UTC](https://forum.universal-robots.com/t/rtde-is-already-in-use-when-using-ur-rtde-with-cb3/33583/2 "2024-04-10T08:32:49Z")

</div>

You may post the code how you connect to the RTDE interface. Maybe there is a bug.