# Problems with node-red-contrib-modbus 5.43.0 after upgrading to Node-Red 4.1.0

**URL:** <https://discourse.nodered.org/t/problems-with-node-red-contrib-modbus-5-43-0-after-upgrading-to-node-red-4-1-0/98709>\
**Category:** Developing Nodes\
**Tags:** modbus\
**Created:** [17 August 2025 16:10 UTC](https://discourse.nodered.org/t/problems-with-node-red-contrib-modbus-5-43-0-after-upgrading-to-node-red-4-1-0/98709 "2025-08-17T16:10:26Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![ftaddia](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/ftaddia/32/102791_2.png) [@ftaddia](https://discourse.nodered.org/u/ftaddia)\
**Post date:** [17 August 2025 16:10 UTC](https://discourse.nodered.org/t/problems-with-node-red-contrib-modbus-5-43-0-after-upgrading-to-node-red-4-1-0/98709/1 "2025-08-17T16:10:27Z")

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Node-Red version: 4.1.0  
NodeJS version: 22.18.0

Hi, I'm also asking here in the forum to see if I'm the only one having this problem or if there are other people.  
This is the issue I've already opened in the node-specific repository: [Modbus-Read node not working after update Node-Red to 4.1.0 version · Issue #540 · BiancoRoyal/node-red-contrib-modbus · GitHub](https://github.com/BiancoRoyal/node-red-contrib-modbus/issues/540)

Thanks to everyone in advance.

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**Author:** ![JoW](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/jow/32/108217_2.png) [@JoW](https://discourse.nodered.org/u/JoW)\
**Post date:** [21 August 2025 12:14 UTC](https://discourse.nodered.org/t/problems-with-node-red-contrib-modbus-5-43-0-after-upgrading-to-node-red-4-1-0/98709/2 "2025-08-21T12:14:48Z")

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Thanks for the heads up.

We only use the flex write node though.

I will try to test on last version as soon as I get my hands on hardware to play with outside of production.

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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:** [20 October 2025 12:15 UTC](https://discourse.nodered.org/t/problems-with-node-red-contrib-modbus-5-43-0-after-upgrading-to-node-red-4-1-0/98709/3 "2025-10-20T12:15:07Z")

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