# Node RED OPC UA Server error
**URL:** https://discourse.nodered.org/t/node-red-opc-ua-server-error/99297
**Category:** General
**Created:** [7 October 2025 12:54 UTC](https://discourse.nodered.org/t/node-red-opc-ua-server-error/99297 "2025-10-07T12:54:32Z")
**Posts on this page:** 12
**Page:** 1
### Author:  [@d.morani](https://discourse.nodered.org/u/d.morani)
#### Post date: [7 October 2025 12:54 UTC](https://discourse.nodered.org/t/node-red-opc-ua-server-error/99297/1 "2025-10-07T12:54:32Z")
## You should set your own key using the 'credentialSecret' option in your settings file. Node-RED will then re-encrypt your credentials file using your chosen key the next time you deploy a change.
7 Oct 14:45:33 - [warn] Encrypted credentials not found
7 Oct 14:45:33 - [info] Server now running at [http://127.0.0.1:1880/](http://127.0.0.1:1880/)
7 Oct 14:45:33 - [info] Starting flows
12:45:33.543Z :opcua\_server :1082 [NODE-OPCUA-W21] maxAllowedSessionNumber property is now deprecated , please use serverCapabilities.maxSessions instead
7 Oct 14:45:33 - [info] Started flows
7 Oct 14:45:33 - [info] [tcp in:ef523e60ed7e5171] listening on port 1100
7 Oct 14:45:33 - [error] [file in:8fc25e25e06be6ed] Error: ENOENT: no such file or directory, open 'C:\home\opc\global.json'
7 Oct 14:45:33 - [error] [function:Restore] TypeError: Cannot read properties of undefined (reading 'length')
---
### Author:  [@jbudd](https://discourse.nodered.org/u/jbudd)
#### Post date: [7 October 2025 13:24 UTC](https://discourse.nodered.org/t/node-red-opc-ua-server-error/99297/2 "2025-10-07T13:24:23Z")
> [@d.morani](#):
>
> Error: ENOENT: no such file or directory, open 'C:\home\opc\global.json'
Does the file 'C:\home\opc\global.json' exist?
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### Author:  [@d.morani](https://discourse.nodered.org/u/d.morani)
#### Post date: [7 October 2025 15:00 UTC](https://discourse.nodered.org/t/node-red-opc-ua-server-error/99297/3 "2025-10-07T15:00:44Z")
yes it is created.
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### Author:  [@jbudd](https://discourse.nodered.org/u/jbudd)
#### Post date: [7 October 2025 15:03 UTC](https://discourse.nodered.org/t/node-red-opc-ua-server-error/99297/4 "2025-10-07T15:03:26Z")
Are you using Docker?
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### Author:  [@d.morani](https://discourse.nodered.org/u/d.morani)
#### Post date: [8 October 2025 05:32 UTC](https://discourse.nodered.org/t/node-red-opc-ua-server-error/99297/5 "2025-10-08T05:32:19Z")
No
Daniele Morani
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### Author:  [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)
#### Post date: [8 October 2025 06:20 UTC](https://discourse.nodered.org/t/node-red-opc-ua-server-error/99297/6 "2025-10-08T06:20:37Z")
Are you running node-red as a service or directly from command line?
Where is node-red installed - same computer as the file or is node-red installed on a remote server?
Does the account running node-red? Have permissions to read that file?
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### Author:  [@d.morani](https://discourse.nodered.org/u/d.morani)
#### Post date: [8 October 2025 06:35 UTC](https://discourse.nodered.org/t/node-red-opc-ua-server-error/99297/7 "2025-10-08T06:35:44Z")
Hi
Yes it is on the same computer. The strange thing is the same file were working until June then now I have this errors. On my VM it is working fine. The permissions are inside. My be I can share with you the flow ?
Daniele Morani
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### Author:  [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)
#### Post date: [8 October 2025 06:39 UTC](https://discourse.nodered.org/t/node-red-opc-ua-server-error/99297/8 "2025-10-08T06:39:47Z")
> [@d.morani](#):
>
> My be I can share with you the flow
Please answer all questions first.
> [@Steve-Mcl](#):
>
> Are you running node-red as a service or directly from command line?
> [@Steve-Mcl](#):
>
> Does the account running node-red have permissions to read that file?
---
### Author:  [@d.morani](https://discourse.nodered.org/u/d.morani)
#### Post date: [8 October 2025 13:32 UTC](https://discourse.nodered.org/t/node-red-opc-ua-server-error/99297/9 "2025-10-08T13:32:57Z")
I donìt understand why it is waiting... on my VM is the same flow and it is working
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### Author:  [@GogoVega](https://discourse.nodered.org/u/GogoVega)
#### Post date: [8 October 2025 13:44 UTC](https://discourse.nodered.org/t/node-red-opc-ua-server-error/99297/10 "2025-10-08T13:44:53Z")
```auto
D:\HMI\.node-red\
```
Your node-red is installed in `D`, can it access `C` volume?
The node label show `/home/opc/global.json` but it should be `C:/home/opc/global.json` or `D:/home/opc/global.json`.
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### Author:  [@d.morani](https://discourse.nodered.org/u/d.morani)
#### Post date: [8 October 2025 14:18 UTC](https://discourse.nodered.org/t/node-red-opc-ua-server-error/99297/11 "2025-10-08T14:18:19Z")
yes i have the access in D and also the path is configured for D:
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### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [6 January 2026 14:19 UTC](https://discourse.nodered.org/t/node-red-opc-ua-server-error/99297/12 "2026-01-06T14:19:03Z")
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