# Fault: C283A18: Lost too many joints

**URL:** <https://forum.universal-robots.com/t/fault-c283a18-lost-too-many-joints/35607>\
**Category:** Technical Questions\
**Created:** [August 8, 2024, 7:53pm UTC](https://forum.universal-robots.com/t/fault-c283a18-lost-too-many-joints/35607 "2024-08-08T19:53:08Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![miladasgari178](https://avatars.discourse-cdn.com/v4/letter/m/a183cd/32.png) [@miladasgari178](https://forum.universal-robots.com/u/miladasgari178)\
**Post date:** [August 8, 2024, 7:53pm UTC](https://forum.universal-robots.com/t/fault-c283a18-lost-too-many-joints/35607/1 "2024-08-08T19:53:08Z")

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Hi I am using the UR5e and recently I faced a problem C283A18 (lost too many joints safety packages)  
I do not what is the source of problem?

 ![photo_2024-08-08_15-52-19](https://us1.discourse-cdn.com/flex020/uploads/universal_robots/original/2X/e/e56fdcb422d6b9e5b8abfa64d0691bf059998e2b.jpeg)

I would appreciate your response

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**Author:** ![efn](https://avatars.discourse-cdn.com/v4/letter/e/35a633/32.png) [@efn](https://forum.universal-robots.com/u/efn)\
**Post date:** [August 9, 2024, 4:51am UTC](https://forum.universal-robots.com/t/fault-c283a18-lost-too-many-joints/35607/2 "2024-08-09T04:51:06Z")

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It is likely a hardware malfunction. Are you running the latest version of Polyscope?

I have seen that code before with a defective cable between controller and robot arm. So you could check that.  
Can you check the error log for other errors appearing simultanuously but being “hidden” by that error?

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**Author:** ![raulonavarr0](https://avatars.discourse-cdn.com/v4/letter/r/a4c791/32.png) [@raulonavarr0](https://forum.universal-robots.com/u/raulonavarr0)\
**Post date:** [August 19, 2024, 2:43pm UTC](https://forum.universal-robots.com/t/fault-c283a18-lost-too-many-joints/35607/3 "2024-08-19T14:43:23Z")

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Any update on this? Im having same issue but mine happened after joint replacement

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**Author:** ![mike.clason](https://avatars.discourse-cdn.com/v4/letter/m/90ced4/32.png) [@mike.clason](https://forum.universal-robots.com/u/mike.clason)\
**Post date:** [October 22, 2024, 5:19pm UTC](https://forum.universal-robots.com/t/fault-c283a18-lost-too-many-joints/35607/4 "2024-10-22T17:19:09Z")

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Any updates on what solved this issue?

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**Author:** ![khalilabuibaid](https://avatars.discourse-cdn.com/v4/letter/k/51bf81/32.png) [@khalilabuibaid](https://forum.universal-robots.com/u/khalilabuibaid)\
**Post date:** [March 11, 2025, 11:06pm UTC](https://forum.universal-robots.com/t/fault-c283a18-lost-too-many-joints/35607/5 "2025-03-11T23:06:55Z")

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Hi everyone, were you guys able to solve this issue?

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**Author:** ![wojciech.chojnacki](https://avatars.discourse-cdn.com/v4/letter/w/5e9695/32.png) [@wojciech.chojnacki](https://forum.universal-robots.com/u/wojciech.chojnacki)\
**Post date:** [March 19, 2025, 3:56pm UTC](https://forum.universal-robots.com/t/fault-c283a18-lost-too-many-joints/35607/6 "2025-03-19T15:56:49Z")

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I had similar problems, replacing the cable from the controller to the robot arm helped. Reply if helped

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**Author:** ![khalilabuibaid](https://avatars.discourse-cdn.com/v4/letter/k/51bf81/32.png) [@khalilabuibaid](https://forum.universal-robots.com/u/khalilabuibaid)\
**Post date:** [March 25, 2025, 3:12pm UTC](https://forum.universal-robots.com/t/fault-c283a18-lost-too-many-joints/35607/7 "2025-03-25T15:12:15Z")

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to be honest, I tried that since we have two ur5e but didnt help.