# Node identifier, Error: String cannot be coerced to a nodeId

**URL:** <https://discourse.nodered.org/t/node-identifier-error-string-cannot-be-coerced-to-a-nodeid/11065>\
**Category:** General\
**Created:** [13 May 2019 11:51 UTC](https://discourse.nodered.org/t/node-identifier-error-string-cannot-be-coerced-to-a-nodeid/11065 "2019-05-13T11:51:30Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![JacksonJoy](https://avatars.discourse-cdn.com/v4/letter/j/7ea924/32.png) [@JacksonJoy](https://discourse.nodered.org/u/JacksonJoy)\
**Post date:** [13 May 2019 11:51 UTC](https://discourse.nodered.org/t/node-identifier-error-string-cannot-be-coerced-to-a-nodeid/11065/1 "2019-05-13T11:51:30Z")

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I am trying to read data from a plc by using node red. I am having an OPC UA Server. Using the UA Expert tool, I found the node id of the variable as ns=3; s=[clx]Temperature\_1. But when i am using this node addresses in inject node and aftr implemtation,I am getting the error as String cannot be coerced to a node id. The screenshots of the above problem is attached. Could anyone help me. Is there any problem with my node id addressing

 ![Implementation%20nodes](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/2X/3/364e8fd5c9c40ccc6acaeb4f305870824fc6f9cc.png) ![UA_Experte](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/2X/3/3ff6b30975d9c0d7f161b7c5e7128ba0f24d9e07.png)

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**Author:** ![khadija](https://avatars.discourse-cdn.com/v4/letter/k/6f9a4e/32.png) [@khadija](https://discourse.nodered.org/u/khadija)\
**Post date:** [29 June 2021 15:49 UTC](https://discourse.nodered.org/t/node-identifier-error-string-cannot-be-coerced-to-a-nodeid/11065/2 "2021-06-29T15:49:01Z")

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I have the same problem , did you find any solution ?