# Build errors on Kbus after device duplication (CODESYS 3.5)

**URL:** <https://www.wago.community/t/build-errors-on-kbus-after-device-duplication-codesys-3-5/769>\
**Category:** CODESYS\
**Tags:** pfc200\
**Created:** [February 1, 2024, 11:44pm UTC](https://www.wago.community/t/build-errors-on-kbus-after-device-duplication-codesys-3-5/769 "2024-02-01T23:44:54Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![abTimJ](https://sea2.discourse-cdn.com/flex016/user_avatar/www.wago.community/abtimj/32/411_2.png) [@abTimJ](https://www.wago.community/u/abTimJ)\
**Post date:** [February 1, 2024, 11:44pm UTC](https://www.wago.community/t/build-errors-on-kbus-after-device-duplication-codesys-3-5/769/1 "2024-02-01T23:44:54Z")

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CODESYS V3.5 SP19 Patch 2

On a multi-controller project, I copied a complete controller, pasted it in the same project, and renamed the controller along with the IP address for the target.

Since then, I’ve done a ‘Clean All’ and downloaded to one target, but then the build on the other target fails on the Kbus (see image).

 ![image](https://us1.discourse-cdn.com/flex016/uploads/wago/original/1X/ea76eb3f6f4b5a602b5449305ea930ad6685ab87.png)

I believe it has to do with these Kbus parameters, but have no idea why (it looks exactly the same as any freshly created (from scratch) controllers):

 ![image](https://us1.discourse-cdn.com/flex016/uploads/wago/original/1X/5c52288058b371e2a3487687c88dc650dbd8fd90.png)

Anyone have any ideas…?

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<div class="post-metadata">

**Author:** ![abTimJ](https://sea2.discourse-cdn.com/flex016/user_avatar/www.wago.community/abtimj/32/411_2.png) [@abTimJ](https://www.wago.community/u/abTimJ)\
**Post date:** [February 6, 2024, 5:55pm UTC](https://www.wago.community/t/build-errors-on-kbus-after-device-duplication-codesys-3-5/769/2 "2024-02-06T17:55:48Z")

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So, apparently performing an “Update Device” solved this issue (even though the version stayed the same). Thanks to Len from Wago Tech Support for that one.

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<div class="post-metadata">

**Author:** ![durallymax](https://avatars.discourse-cdn.com/v4/letter/d/9fc348/32.png) [@durallymax](https://www.wago.community/u/durallymax)\
**Post date:** [October 21, 2025, 12:52pm UTC](https://www.wago.community/t/build-errors-on-kbus-after-device-duplication-codesys-3-5/769/3 "2025-10-21T12:52:09Z")

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Found this thread as I was experiencing an issue with all K-bus modules being red after a download following a device update. (No compile errors though)

Updated device (PFC200) again, despite being the same version, and with a new download issue was resolved.