# OPC\_UA BadNodeIDUnknown

**URL:** <https://forum.inductiveautomation.com/t/opc-ua-badnodeidunknown/80539>\
**Category:** General Discussion\
**Created:** [October 16, 2023, 5:02pm UTC](https://forum.inductiveautomation.com/t/opc-ua-badnodeidunknown/80539 "2023-10-16T17:02:24Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Kurt\_Brunner](https://avatars.discourse-cdn.com/v4/letter/k/e480ec/32.png) [@Kurt\_Brunner](https://forum.inductiveautomation.com/u/Kurt_Brunner)\
**Post date:** [October 16, 2023, 5:02pm UTC](https://forum.inductiveautomation.com/t/opc-ua-badnodeidunknown/80539/1 "2023-10-16T17:02:24Z")

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We have been having an issue with the Node ID changing causing tag links to break. Can someone tell me where this node ID is generated and what would cause it to change? The screenshot shows the highlighted ID in question.  
Thanks in advance.

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/d/a/dacef2e18ea576b03a676b2fcc29cc48e68f5468.png)

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**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\
**Post date:** [October 16, 2023, 5:07pm UTC](https://forum.inductiveautomation.com/t/opc-ua-badnodeidunknown/80539/2 "2023-10-16T17:07:25Z")

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The OPC server you are connecting to generates that. Apparently that server is broken, as it isn't giving you repeatable item paths within that namespace. Unless someone is changing the PLC code that corresponds to those data points.

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**Author:** ![Kurt\_Brunner](https://avatars.discourse-cdn.com/v4/letter/k/e480ec/32.png) [@Kurt\_Brunner](https://forum.inductiveautomation.com/u/Kurt_Brunner)\
**Post date:** [October 16, 2023, 5:14pm UTC](https://forum.inductiveautomation.com/t/opc-ua-badnodeidunknown/80539/3 "2023-10-16T17:14:21Z")

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What appears to be happening is the ID number changes from time to time with no one being able to explain why. If we see a configuration error in ignition, we then check this ID and find it has changed which breaks the connection/path. My thought is that the vendor is pushing updates to machine code without notice to anyone but there is no real way to prove this. I will dig into it further by getting with the vendor and inquiring as to which OPC server they are using to see if that number can be a constant. Thanks for the response.

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**Author:** ![JordanCClark](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/jordancclark/32/83362_2.png) [@JordanCClark](https://forum.inductiveautomation.com/u/JordanCClark)\
**Post date:** [October 17, 2023, 10:29am UTC](https://forum.inductiveautomation.com/t/opc-ua-badnodeidunknown/80539/5 "2023-10-17T10:29:47Z")

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@alicja_brook Do you actually have something, or are you just changing the original post slightly in hopes of spamming later?

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**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\
**Post date:** [October 17, 2023, 10:31am UTC](https://forum.inductiveautomation.com/t/opc-ua-badnodeidunknown/80539/6 "2023-10-17T10:31:45Z")

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I suspect they're a spammer as well, but I hadn't had coffee yet and didn't want to get the ban hammer out too hastily, so I approved it.

edit: well that didn't take long.