# Safety Fault: C26A18 Communication

**URL:** <https://forum.universal-robots.com/t/safety-fault-c26a18-communication/36531>\
**Category:** Technical Questions\
**Created:** [October 15, 2024, 6:16pm UTC](https://forum.universal-robots.com/t/safety-fault-c26a18-communication/36531 "2024-10-15T18:16:33Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![denzel.pearson](https://avatars.discourse-cdn.com/v4/letter/d/6de8d8/32.png) [@denzel.pearson](https://forum.universal-robots.com/u/denzel.pearson)\
**Post date:** [October 15, 2024, 6:16pm UTC](https://forum.universal-robots.com/t/safety-fault-c26a18-communication/36531/1 "2024-10-15T18:16:33Z")

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Is anyone familiar with this fault error and know a solution? I have done a complete rebooting sequence and that did not solve anything. This is occuring on a UR 5 e series. The fault message is,

"Robot Interface: C26A18 communication: Failed to communicate with TOOL. Explanation: Tool failed to start communicating as expected. "

 ![ok](https://us1.discourse-cdn.com/flex020/uploads/universal_robots/original/2X/f/f87f72bdbe8aebc5abc9e1b2320f6f598e82d7f0.jpeg)

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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:** [October 16, 2024, 5:50am UTC](https://forum.universal-robots.com/t/safety-fault-c26a18-communication/36531/2 "2024-10-16T05:50:56Z")

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I don’t think there’s much to do except for replacing the tool mounting bracket.

You should contact your local distributor to have them confirm this and arrange for replacing. 🙂