# Modbu serial failed

**URL:** <https://discourse.nodered.org/t/modbu-serial-failed/64363>\
**Category:** Hardware\
**Tags:** modbus\
**Created:** [25 June 2022 14:58 UTC](https://discourse.nodered.org/t/modbu-serial-failed/64363 "2022-06-25T14:58:19Z")\
**Posts on this page:** 8\
**Page:** 1

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**Author:** ![Por1995](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/por1995/32/63808_2.png) [@Por1995](https://discourse.nodered.org/u/Por1995)\
**Post date:** [25 June 2022 14:58 UTC](https://discourse.nodered.org/t/modbu-serial-failed/64363/1 "2022-06-25T14:58:19Z")

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Hi every one I have a problem with modbus serial below

 ![messageImage_1656168198280](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/f/a/fa94ff0c4f043175fd57abe00da746b0f3cdec5e.jpeg)  
 ![messageImage_1656168230132](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/4/6/46a3daadc8edbafc9f0ae77fd62a176371618230.jpeg)

how can I fix it node version 16.15.1 npm version 8.13.1 thank.

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**Author:** ![marcus-j-davies](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/marcus-j-davies/32/103435_2.png) [@marcus-j-davies](https://discourse.nodered.org/u/marcus-j-davies)\
**Post date:** [25 June 2022 15:02 UTC](https://discourse.nodered.org/t/modbu-serial-failed/64363/2 "2022-06-25T15:02:57Z")

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Welcome to forums @Por1995☺

Have you recently updated your node version?

This error usually occurs when a native Node binary was compiled using a node version, that it is no longer running under.

within the `.node-red` dir run `npm rebuild`

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<div class="post-metadata">

**Author:** ![Por1995](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/por1995/32/63808_2.png) [@Por1995](https://discourse.nodered.org/u/Por1995)\
**Post date:** [25 June 2022 15:05 UTC](https://discourse.nodered.org/t/modbu-serial-failed/64363/3 "2022-06-25T15:05:49Z")

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yes I update node version I'll try npm rebuild. thank

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**Author:** ![Por1995](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/por1995/32/63808_2.png) [@Por1995](https://discourse.nodered.org/u/Por1995)\
**Post date:** [25 June 2022 15:13 UTC](https://discourse.nodered.org/t/modbu-serial-failed/64363/4 "2022-06-25T15:13:46Z")

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now I run npm rebulid but is ERR!

 ![1656169844357](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/2/d/2d56418c462618260ca5b1aac2a55169ec865bee.jpeg)  
how can I fix

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**Author:** ![marcus-j-davies](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/marcus-j-davies/32/103435_2.png) [@marcus-j-davies](https://discourse.nodered.org/u/marcus-j-davies)\
**Post date:** [25 June 2022 15:17 UTC](https://discourse.nodered.org/t/modbu-serial-failed/64363/5 "2022-06-25T15:17:53Z")

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Try running `cmd` with elevated privileges - i.e `run as administrator`  
you will then need to cd to the `.node-red` dir

as the `cmd` window will initiually be running under the `systems32` folder.  
but `npm rebuild` needs to run under your `.node-red` dir

I don't actually use windows (for anything) - so maybe someone who is better qualified in windows can clarify

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**Author:** ![Por1995](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/por1995/32/63808_2.png) [@Por1995](https://discourse.nodered.org/u/Por1995)\
**Post date:** [25 June 2022 16:39 UTC](https://discourse.nodered.org/t/modbu-serial-failed/64363/6 "2022-06-25T16:39:02Z")

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thank a lot now I can use modbus serial

 ![messageImage_1656174971326](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/c/9/c90bbd465918d45270e412e927f8220ec8aa362d.jpeg)  
😊

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<div class="post-metadata">

**Author:** ![marcus-j-davies](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/marcus-j-davies/32/103435_2.png) [@marcus-j-davies](https://discourse.nodered.org/u/marcus-j-davies)\
**Post date:** [25 June 2022 16:40 UTC](https://discourse.nodered.org/t/modbu-serial-failed/64363/7 "2022-06-25T16:40:59Z")

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Excellent!

An easy one this time around 😉

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**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [9 July 2022 16:41 UTC](https://discourse.nodered.org/t/modbu-serial-failed/64363/8 "2022-07-09T16:41:04Z")

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