# Invalid Endpoint Error

**URL:** <https://discourse.nodered.org/t/invalid-endpoint-error/71452>\
**Category:** General\
**Tags:** opcua\
**Created:** [29 November 2022 14:06 UTC](https://discourse.nodered.org/t/invalid-endpoint-error/71452 "2022-11-29T14:06:41Z")\
**Posts on this page:** 8\
**Page:** 1

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**Author:** ![YTT](https://avatars.discourse-cdn.com/v4/letter/y/77aa72/32.png) [@YTT](https://discourse.nodered.org/u/YTT)\
**Post date:** [29 November 2022 14:06 UTC](https://discourse.nodered.org/t/invalid-endpoint-error/71452/1 "2022-11-29T14:06:41Z")

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![image](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/0/7/076caecc78606c13bf7e27ce3e26ff96318b8ab6.png)

How to solve this problem? I am trying to read the boolean data from ua client. I had confirmed that the username and password i key in are correct.

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**Author:** ![Steve-Mcl](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/steve-mcl/32/4826_2.png) [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)\
**Post date:** [29 November 2022 14:16 UTC](https://discourse.nodered.org/t/invalid-endpoint-error/71452/2 "2022-11-29T14:16:04Z")

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Is the OPC server on the same computer as Node-RED?

Can you connect to the OPC server using another OPC client (for example: **UaExpert** )?

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**Author:** ![YTT](https://avatars.discourse-cdn.com/v4/letter/y/77aa72/32.png) [@YTT](https://discourse.nodered.org/u/YTT)\
**Post date:** [29 November 2022 14:18 UTC](https://discourse.nodered.org/t/invalid-endpoint-error/71452/3 "2022-11-29T14:18:14Z")

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Yes, I use the same computer. The server I use is kepware and the client is exactly UaExpert.

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**Author:** ![Steve-Mcl](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/steve-mcl/32/4826_2.png) [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)\
**Post date:** [29 November 2022 14:20 UTC](https://discourse.nodered.org/t/invalid-endpoint-error/71452/4 "2022-11-29T14:20:02Z")

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> [@YTT](#):
>
> The server I use is kepware and the client is exactly UaExpert.

Sorry, this reply makes no sense to me.

Can you connect to the OPC server using another OPC client (for example: **UaExpert** )? Can you see values from your server in UaExpert?

* * *

PS, out of interest, what is the Kepware connecting to? a PLC? what type of PLC?

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**Author:** ![YTT](https://avatars.discourse-cdn.com/v4/letter/y/77aa72/32.png) [@YTT](https://discourse.nodered.org/u/YTT)\
**Post date:** [29 November 2022 14:28 UTC](https://discourse.nodered.org/t/invalid-endpoint-error/71452/5 "2022-11-29T14:28:14Z")

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I can read the value from the UaExpert. Actually, I am doing a project which use kepware to connect factory Io, Cx-programmer, and node-red. So, I actually want to transfer the value from Cx-programmer to node-red.

Sorry for that reply, but I actually can read the value from the UaExpert. Thank you.

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**Author:** ![Steve-Mcl](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/steve-mcl/32/4826_2.png) [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)\
**Post date:** [29 November 2022 14:45 UTC](https://discourse.nodered.org/t/invalid-endpoint-error/71452/6 "2022-11-29T14:45:40Z")

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> [@YTT](#):
>
> I actually want to transfer the value from Cx-programmer to node-red.

Strictly speaking, CX-Programmer is a software that programs an OMRON PLC (you do not "transfer the value from Cx-programmer")

And since you are using OMRON PLC, there is no real need to pay lots of money for Kepware. You can use `node-red-contrib-omron-fins` for many of the OMRON PLCs and skip OPC altogether. Is that an option?

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**Author:** ![YTT](https://avatars.discourse-cdn.com/v4/letter/y/77aa72/32.png) [@YTT](https://discourse.nodered.org/u/YTT)\
**Post date:** [29 November 2022 15:05 UTC](https://discourse.nodered.org/t/invalid-endpoint-error/71452/7 "2022-11-29T15:05:34Z")

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> [@Steve-Mcl](#):
>
> You can use `node-red-contrib-omron-fins` for many of the OMRON PLCs and skip OPC altogether.

Alright, I will try this.

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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:** [28 January 2023 15:05 UTC](https://discourse.nodered.org/t/invalid-endpoint-error/71452/8 "2023-01-28T15:05:48Z")

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