# Port in Use NodeRed Error

**URL:** <https://discourse.nodered.org/t/port-in-use-nodered-error/65158>\
**Category:** General\
**Created:** [15 July 2022 17:50 UTC](https://discourse.nodered.org/t/port-in-use-nodered-error/65158 "2022-07-15T17:50:33Z")\
**Posts on this page:** 20\
**Page:** 1

<div class="post-metadata">

**Author:** ![dlo987](https://avatars.discourse-cdn.com/v4/letter/d/cdc98d/32.png) [@dlo987](https://discourse.nodered.org/u/dlo987)\
**Post date:** [15 July 2022 17:50 UTC](https://discourse.nodered.org/t/port-in-use-nodered-error/65158/1 "2022-07-15T17:50:34Z")

</div>

![Captura de pantalla de 2022-07-15 12-42-52](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/3/3/33bb44ea2f72818ae94489db20d46e6cf2cd69f4.png)

hi, I´ve already installed node red 3.0, because I was having trouble with the previous version about this problem, but the issue persists. I´ve tried to fix it killing the process but when I start the server again it works for a few minutes and then no more.

---

<div class="post-metadata">

**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:** [15 July 2022 17:53 UTC](https://discourse.nodered.org/t/port-in-use-nodered-error/65158/2 "2022-07-15T17:53:56Z")

</div>

stop old running node-red by `node-red-stop` then try `node-red-start`

if that doesnt work, reboot (to release hold on port 1880)

---

<div class="post-metadata">

**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:** [15 July 2022 17:55 UTC](https://discourse.nodered.org/t/port-in-use-nodered-error/65158/3 "2022-07-15T17:55:49Z")

</div>

oh - i just noticed you are running nodejs v10 - good luck with that. It is designed and tested on nodejs v14 and above only (anything less is unsupported)

---

<div class="post-metadata">

**Author:** ![dlo987](https://avatars.discourse-cdn.com/v4/letter/d/cdc98d/32.png) [@dlo987](https://discourse.nodered.org/u/dlo987)\
**Post date:** [15 July 2022 17:57 UTC](https://discourse.nodered.org/t/port-in-use-nodered-error/65158/4 "2022-07-15T17:57:31Z")

</div>

what version of node-red is suitable for nodejs v10?

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<div class="post-metadata">

**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:** [15 July 2022 17:58 UTC](https://discourse.nodered.org/t/port-in-use-nodered-error/65158/5 "2022-07-15T17:58:02Z")

</div>

I would recommend NodeJS v16 LTS for node-red v3

nodejs v12 for node-red V2.x

nodejs v10 for node-red V1.x

BUT nodejs - v10 and v12 are END OF LIFE (unsupported - so I wont run any of those)

---

<div class="post-metadata">

**Author:** ![dlo987](https://avatars.discourse-cdn.com/v4/letter/d/cdc98d/32.png) [@dlo987](https://discourse.nodered.org/u/dlo987)\
**Post date:** [15 July 2022 18:04 UTC](https://discourse.nodered.org/t/port-in-use-nodered-error/65158/6 "2022-07-15T18:04:45Z")

</div>

thnx I'll upgrade it to the newest version but its recommended to do that in a HP Pavilion G62 - Intel Core i3 with 4GB of RAM?.

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<div class="post-metadata">

**Author:** ![Colin](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/colin/32/17040_2.png) [@Colin](https://discourse.nodered.org/u/Colin)\
**Post date:** [15 July 2022 18:58 UTC](https://discourse.nodered.org/t/port-in-use-nodered-error/65158/7 "2022-07-15T18:58:49Z")

</div>

What OS are you running on?

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<div class="post-metadata">

**Author:** ![dlo987](https://avatars.discourse-cdn.com/v4/letter/d/cdc98d/32.png) [@dlo987](https://discourse.nodered.org/u/dlo987)\
**Post date:** [15 July 2022 19:37 UTC](https://discourse.nodered.org/t/port-in-use-nodered-error/65158/8 "2022-07-15T19:37:49Z")

</div>

ubuntu 20.04

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<div class="post-metadata">

**Author:** ![dlo987](https://avatars.discourse-cdn.com/v4/letter/d/cdc98d/32.png) [@dlo987](https://discourse.nodered.org/u/dlo987)\
**Post date:** [15 July 2022 19:38 UTC](https://discourse.nodered.org/t/port-in-use-nodered-error/65158/9 "2022-07-15T19:38:37Z")

</div>

Ive just updated node js to v.16 but the problem still presists

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<div class="post-metadata">

**Author:** ![Colin](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/colin/32/17040_2.png) [@Colin](https://discourse.nodered.org/u/Colin)\
**Post date:** [15 July 2022 19:50 UTC](https://discourse.nodered.org/t/port-in-use-nodered-error/65158/10 "2022-07-15T19:50:24Z")

</div>

Run  
`node-red-start`  
`node-red-stop`  
and post the full output of both commands here. Please copy/paste the text, not screenshot. Use the `</>` button at the top of the forum entry window when pasting it.

---

<div class="post-metadata">

**Author:** ![dlo987](https://avatars.discourse-cdn.com/v4/letter/d/cdc98d/32.png) [@dlo987](https://discourse.nodered.org/u/dlo987)\
**Post date:** [15 July 2022 20:26 UTC](https://discourse.nodered.org/t/port-in-use-nodered-error/65158/12 "2022-07-15T20:26:47Z")

</div>

```auto

diego@diego-HP-G42-Notebook-PC:~$ top

top - 15:20:07 up 1:25, 1 user, load average: 1,27, 0,72, 0,33
Tareas: 207 total, 2 ejecutar, 205 hibernar, 0 detener, 0 zombie
%Cpu(s): 25,5 usuario, 1,3 sist, 0,0 adecuado, 73,2 inact, 0,0 en espera, 0,0 hardw int, 0,0 softw int, 0,0 robar tiempo
MiB Mem : 3724,7 total, 199,9 libre, 1010,6 usado, 2514,2 búfer/caché
MiB Intercambio: 2048,0 total, 2048,0 libre, 0,0 usado. 2339,4 dispon Mem 

    PID USUARIO PR NI VIRT RES SHR S %CPU %MEM HORA+ ORDEN                                                                  
   3033 diego 20 0 952432 98564 35196 R 100,0 2,6 4:52.56 node-red                                                               
    849 diego 20 0 340204 60228 31016 S 3,4 1,6 0:09.82 Xorg                                                                   
   1114 diego 20 0 4259244 233272 86984 S 1,7 6,1 0:27.94 gnome-shell                                                            
   2993 diego 20 0 818432 52152 39028 S 1,7 1,4 0:02.90 gnome-terminal-                                                        
   3557 root 20 0 0 0 0 I 1,7 0,0 0:00.46 kworker/u16:2-events_unbound                                           
   3666 diego 20 0 14728 4248 3436 R 1,7 0,1 0:00.03 top                                                                    
      1 root 20 0 169548 12808 8316 S 0,0 0,3 0:06.26 systemd                                                                
      2 root 20 0 0 0 0 S 0,0 0,0 0:00.00 kthreadd                                                               
      3 root 0 -20 0 0 0 I 0,0 0,0 0:00.00 rcu_gp                                                                 
      4 root 0 -20 0 0 0 I 0,0 0,0 0:00.00 rcu_par_gp                                                             
      5 root 0 -20 0 0 0 I 0,0 0,0 0:00.00 netns                                                                  
      9 root 0 -20 0 0 0 I 0,0 0,0 0:00.00 mm_percpu_wq                                                           
     10 root 20 0 0 0 0 S 0,0 0,0 0:00.00 rcu_tasks_rude_                                                        
     11 root 20 0 0 0 0 S 0,0 0,0 0:00.00 rcu_tasks_trace                                                        
     12 root 20 0 0 0 0 S 0,0 0,0 0:00.15 ksoftirqd/0                                                            
     13 root 20 0 0 0 0 I 0,0 0,0 0:01.33 rcu_sched                                                              
     14 root rt 0 0 0 0 S 0,0 0,0 0:00.03 migration/0                                                            
     15 root -51 0 0 0 0 S 0,0 0,0 0:00.00 idle_inject/0                                                          
     17 root 20 0 0 0 0 S 0,0 0,0 0:00.00 cpuhp/0                                                                
     18 root 20 0 0 0 0 S 0,0 0,0 0:00.00 cpuhp/1                                                                
     19 root -51 0 0 0 0 S 0,0 0,0 0:00.00 idle_inject/1                                                          
     20 root rt 0 0 0 0 S 0,0 0,0 0:00.28 migration/1                                                            
     21 root 20 0 0 0 0 S 0,0 0,0 0:01.44 ksoftirqd/1                                                            
     23 root 0 -20 0 0 0 I 0,0 0,0 0:00.00 kworker/1:0H-kblockd                                                   
     24 root 20 0 0 0 0 S 0,0 0,0 0:00.00 cpuhp/2                                                                
     25 root -51 0 0 0 0 S 0,0 0,0 0:00.00 idle_inject/2                                                          
     26 root rt 0 0 0 0 S 0,0 0,0 0:00.29 migration/2                                                            
     27 root 20 0 0 0 0 S 0,0 0,0 0:00.12 ksoftirqd/2                                                            
     29 root 0 -20 0 0 0 I 0,0 0,0 0:00.00 kworker/2:0H-kblockd                                                   
     30 root 20 0 0 0 0 S 0,0 0,0 0:00.00 cpuhp/3                                                                
     31 root -51 0 0 0 0 S 0,0 0,0 0:00.00 idle_inject/3                                                          
diego@diego-HP-G42-Notebook-PC:~$ sudo kill -9 3033
diego@diego-HP-G42-Notebook-PC:~$ 
diego@diego-HP-G42-Notebook-PC:~$ 
diego@diego-HP-G42-Notebook-PC:~$ node-red-start
node-red-start: no se encontró la orden
diego@diego-HP-G42-Notebook-PC:~$ node-red start
15 Jul 15:20:41 - [info] 

Welcome to Node-RED
===================

15 Jul 15:20:41 - [info] Node-RED version: v3.0.0
15 Jul 15:20:41 - [info] Node.js version: v16.16.0
15 Jul 15:20:41 - [info] Linux 5.15.0-41-generic x64 LE
15 Jul 15:20:41 - [info] Loading palette nodes
15 Jul 15:20:42 - [info] Dashboard version 3.1.7 started at /ui
15 Jul 15:20:42 - [info] Settings file : /home/diego/.node-red/settings.js
15 Jul 15:20:42 - [info] Context store : 'default' [module=memory]
15 Jul 15:20:42 - [info] User directory : /home/diego/.node-red
15 Jul 15:20:42 - [warn] Projects disabled : editorTheme.projects.enabled=false
15 Jul 15:20:42 - [info] Flows file : /home/diego/.node-red/start
15 Jul 15:20:42 - [warn] 

---------------------------------------------------------------------
Your flow credentials file is encrypted using a system-generated key.

If the system-generated key is lost for any reason, your credentials
file will not be recoverable, you will have to delete it and re-enter
your credentials.

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.
---------------------------------------------------------------------

15 Jul 15:20:42 - [warn] Encrypted credentials not found
15 Jul 15:20:42 - [info] Server now running at http://192.168.1.124:1880/
15 Jul 15:20:42 - [info] Starting flows
15 Jul 15:20:42 - [info] Started flows
15 Jul 15:20:42 - [error] [MySQLdatabase:DB_smartmeter] Error: connect ECONNREFUSED 127.0.0.1:3306
express deprecated res.status("200"): use res.status(200) instead ../../usr/local/lib/node_modules/node-red/node_modules/@node-red/nodes/core/network/21-httpin.js:328:34
^C^C

```

---

<div class="post-metadata">

**Author:** ![Colin](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/colin/32/17040_2.png) [@Colin](https://discourse.nodered.org/u/Colin)\
**Post date:** [15 July 2022 20:41 UTC](https://discourse.nodered.org/t/port-in-use-nodered-error/65158/13 "2022-07-15T20:41:12Z")

</div>

> [@dlo987](#):
>
> `3033 diego 20 0 952432 98564 35196 R 100,0 2,6 4:52.56 node-red`

node-red is using 100% of CPU. You need to find out what is causing that. That is probably at the root of the problem. Possibly start by disabling tabs and watching the processor.

> [@dlo987](#):
>
> ```auto
> diego@diego-HP-G42-Notebook-PC:~$ node-red-start
> node-red-start: no se encontró la orden
> 
> ```

That is the correct command (not node-red start, which runs a flows file called start). The fact that the command is not found means that you did not install using the recommended ubuntu/debian/pi script. Though that is probably not causing the problem you are seeing.  
[https://nodered.org/docs/getting-started/raspberrypi](https://nodered.org/docs/getting-started/raspberrypi)

---

<div class="post-metadata">

**Author:** ![Colin](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/colin/32/17040_2.png) [@Colin](https://discourse.nodered.org/u/Colin)\
**Post date:** [15 July 2022 20:45 UTC](https://discourse.nodered.org/t/port-in-use-nodered-error/65158/14 "2022-07-15T20:45:35Z")

</div>

However, I don't know know which problem you think you have. Your initial problem was the port issue, which was due to the fact that node-red was already running, but you seem to have sorted that by killing the previous version (which is not good, it would be better to run the install script in the link I posted, then you could use the commands I posted)

---

<div class="post-metadata">

**Author:** ![dlo987](https://avatars.discourse-cdn.com/v4/letter/d/cdc98d/32.png) [@dlo987](https://discourse.nodered.org/u/dlo987)\
**Post date:** [15 July 2022 22:13 UTC](https://discourse.nodered.org/t/port-in-use-nodered-error/65158/15 "2022-07-15T22:13:11Z")

</div>

```auto
Running Node-RED install for user diego at /home/diego on ubuntu

This can take 20-30 minutes on the slower Pi versions - please wait.

  Stop Node-RED ✔
  Remove old version of Node-RED ✔
  Remove old version of Node.js ✔   
  Install Node.js 16 LTS ✔ v16.16.0 Npm 8.11.0
  Clean npm cache ✔
npm WARN config global `--global`, `--local` are deprecated. Use `--location=global` instead.local          
  Install Node-RED core ✔ 3.0.0
  Move global nodes to local -
  Npm rebuild existing nodes ✔
  Install extra Pi nodes ✔
  Add shortcut commands ✔
  Update systemd script ✔
Any errors will be logged to /var/log/nodered-install.log

All done.
You can now start Node-RED with the command node-red-start
  or using the icon under Menu / Programming / Node-RED
Then point your browser to localhost:1880 or http://{your_pi_ip-address}:1880

Started : vie 15 jul 2022 16:32:59 -05 
Finished: vie 15 jul 2022 16:34:24 -05
 
Just FYI : Your settings.js file is different from the latest defaults.
You may wish to run
   diff -y --suppress-common-lines /usr/lib/node_modules/node-red/settings.js /home/diego/.node-red/settings.js
to compare them and see what the latest options are.

```

Ive follow all the steps in the documentation but i cant access to the editor via browser and node-red-stop runs but doesnt kill the process

---

<div class="post-metadata">

**Author:** ![Colin](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/colin/32/17040_2.png) [@Colin](https://discourse.nodered.org/u/Colin)\
**Post date:** [16 July 2022 16:04 UTC](https://discourse.nodered.org/t/port-in-use-nodered-error/65158/16 "2022-07-16T16:04:22Z")

</div>

Three questions.

1. What does this command show?  
`sudo systemctl status nodered` (note, nodered not node-red)

2. How are you starting node-red? Show me the exact command.

3. Is node-red still consuming 100% of the CPU (or close to it)?

---

<div class="post-metadata">

**Author:** ![dlo987](https://avatars.discourse-cdn.com/v4/letter/d/cdc98d/32.png) [@dlo987](https://discourse.nodered.org/u/dlo987)\
**Post date:** [16 July 2022 16:24 UTC](https://discourse.nodered.org/t/port-in-use-nodered-error/65158/17 "2022-07-16T16:24:27Z")

</div>

```auto

diego@diego-HP-G42-Notebook-PC:~$ sudo systemctl status nodered
● nodered.service - Node-RED graphical event wiring tool
     Loaded: loaded (/lib/systemd/system/nodered.service; disabled; vendor preset: enabled)
     Active: active (running) since Fri 2022-07-15 22:09:48 -05; 13h ago
       Docs: http://nodered.org/docs/hardware/raspberrypi.html
   Main PID: 29419 (node-red)
      Tasks: 11 (limit: 4381)
     Memory: 66.3M
     CGroup: /system.slice/nodered.service
             └─29419 node-red

jul 15 22:09:50 diego-HP-G42-Notebook-PC Node-RED[29419]: 15 Jul 22:09:50 - [warn] Encrypted credentials not found
jul 15 22:09:50 diego-HP-G42-Notebook-PC Node-RED[29419]: 15 Jul 22:09:50 - [info] Server now running at http://192.168.1.124:1880/
jul 15 22:09:50 diego-HP-G42-Notebook-PC Node-RED[29419]: 15 Jul 22:09:50 - [info] Starting flows
jul 15 22:09:51 diego-HP-G42-Notebook-PC Node-RED[29419]: 15 Jul 22:09:51 - [info] Started flows
jul 15 22:21:11 diego-HP-G42-Notebook-PC Node-RED[29419]: 15 Jul 22:21:11 - [info] Stopping flows
jul 15 22:21:11 diego-HP-G42-Notebook-PC Node-RED[29419]: 15 Jul 22:21:11 - [info] Stopped flows
jul 15 22:21:11 diego-HP-G42-Notebook-PC Node-RED[29419]: 15 Jul 22:21:11 - [info] Updated flows
jul 15 22:21:11 diego-HP-G42-Notebook-PC Node-RED[29419]: 15 Jul 22:21:11 - [info] Starting flows
jul 15 22:21:11 diego-HP-G42-Notebook-PC Node-RED[29419]: 15 Jul 22:21:11 - [info] Started flows
jul 16 11:09:27 diego-HP-G42-Notebook-PC Node-RED[29419]: Sat, 16 Jul 2022 16:09:27 GMT express deprecated res.status("200"): use res.status(>

diego@diego-HP-G42-Notebook-PC:~$ node-red-start 

Start Node-RED
 
Once Node-RED has started, point a browser at http://192.168.1.124:1880
On Pi Node-RED works better with the Firefox or Chrome browser
 
Use node-red-stop to stop Node-RED
Use node-red-start to start Node-RED again
Use node-red-log to view the recent log output
Use sudo systemctl enable nodered.service to autostart Node-RED at every boot
Use sudo systemctl disable nodered.service to disable autostart on boot
 
To find more nodes and example flows - go to http://flows.nodered.org
 
Starting as a systemd service.
Sat, 16 Jul 2022 16:09:27 GMT express deprecated res.status("200"): use res.status(200) instead at ../../usr/lib/node_modules/node-red/node_modules/@node-red/nodes/core/network/21-httpin.js:328:34
^C
diego@diego-HP-G42-Notebook-PC:~$ top

top - 11:19:34 up 21:24, 1 user, load average: 1,13, 1,09, 0,81
Tareas: 230 total, 2 ejecutar, 228 hibernar, 0 detener, 0 zombie
%Cpu(s): 25,8 usuario, 0,5 sist, 0,0 adecuado, 73,5 inact, 0,1 en espera, 0,0 hardw int, 0,1 softw int, 0,0 robar tiempo
MiB Mem : 3724,7 total, 320,7 libre, 1637,3 usado, 1766,6 búfer/caché
MiB Intercambio: 2048,0 total, 1862,8 libre, 185,2 usado. 1649,2 dispon Mem 

    PID USUARIO PR NI VIRT RES SHR S %CPU %MEM HORA+ ORDEN                                                                  
  29419 diego 20 0 955224 98816 35440 R 100,3 2,6 10:11.63 node-red                                                               
    849 diego 20 0 359588 65800 34692 S 1,0 1,7 7:37.32 Xorg                                                                   
   1114 diego 20 0 4278076 226936 73328 S 1,0 5,9 7:54.42 gnome-shell                                                            
  33156 diego 20 0 14740 4112 3320 S 0,7 0,1 0:02.79 top                                                                    
    206 root 20 0 0 0 0 S 0,3 0,0 0:05.95 usb-storage                                                            
    336 root 20 0 0 0 0 S 0,3 0,0 0:04.39 ips-monitor                                                            
    837 diego 9 -11 3771740 16240 13272 S 0,3 0,4 2:16.41 pulseaudio                                                             
    984 root 20 0 255040 9668 8424 S 0,3 0,3 0:01.42 upowerd                                                                
   2993 diego 20 0 830848 50884 35568 S 0,3 1,3 1:14.05 gnome-terminal-                                                        
  29558 diego 20 0 452988 8028 6468 S 0,3 0,2 0:00.91 sd_espeak-ng                                                           
  30744 root 20 0 0 0 0 I 0,3 0,0 0:02.18 kworker/u16:23-events_unbound                                          
      1 root 20 0 169536 12656 8112 S 0,0 0,3 0:22.85 systemd                                                                
      2 root 20 0 0 0 0 S 0,0 0,0 0:00.04 kthreadd                                                               
      3 root 0 -20 0 0 0 I 0,0 0,0 0:00.00 rcu_gp  

```

---

<div class="post-metadata">

**Author:** ![Colin](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/colin/32/17040_2.png) [@Colin](https://discourse.nodered.org/u/Colin)\
**Post date:** [16 July 2022 16:29 UTC](https://discourse.nodered.org/t/port-in-use-nodered-error/65158/18 "2022-07-16T16:29:34Z")

</div>

So as you can see node-red is still consuming all the processor. If you run  
`node-red-stop`  
`node-red --safe`  
then it will load the flows but not run them. Then you should be able to get into the editor so you can remove whatever is causing the processor overload. When you deploy it will start running the flows.

---

<div class="post-metadata">

**Author:** ![Nodi.Rubrum](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/nodi.rubrum/32/107482_2.png) [@Nodi.Rubrum](https://discourse.nodered.org/u/Nodi.Rubrum)\
**Post date:** [16 July 2022 16:50 UTC](https://discourse.nodered.org/t/port-in-use-nodered-error/65158/19 "2022-07-16T16:50:19Z")

</div>

Having done this several times... I suggest once you have the editor open, disable EVERY flow, and then selectively enable them and test each as an individual test. This should set a baseline for each flow load. Then selectively enable additional flows and test. It is often the total concurrent flows running that slam the hosting system, unless you happen to have a specific poorly behaving flow.

This is is typical of how docker images, virtual machines, etc. all have to be evaluated in a peer to peer context to find the 'tipping' point. In the case of virtualization of entire virtual machines or just application level containers, i.e. docker, there are 100s of tools that allow for balancing and evaluating peer to peer processes.

I have not done any research, but if there is a Node level tool that can qualify peer to peer threading/processing under Node, that might be one way to get a better view of the load conflicts.

---

<div class="post-metadata">

**Author:** ![dlo987](https://avatars.discourse-cdn.com/v4/letter/d/cdc98d/32.png) [@dlo987](https://discourse.nodered.org/u/dlo987)\
**Post date:** [16 July 2022 16:56 UTC](https://discourse.nodered.org/t/port-in-use-nodered-error/65158/20 "2022-07-16T16:56:20Z")

</div>

Im using a HTTP IN node to receive the information of my ESP 8266 via HTTP POST, It was working fine but 1 month later this problem occurred.

---

<div class="post-metadata">

**Author:** ![Nodi.Rubrum](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/nodi.rubrum/32/107482_2.png) [@Nodi.Rubrum](https://discourse.nodered.org/u/Nodi.Rubrum)\
**Post date:** [16 July 2022 16:59 UTC](https://discourse.nodered.org/t/port-in-use-nodered-error/65158/21 "2022-07-16T16:59:53Z")

</div>

Sounds like, some software update, changed the context of the environment. My gut level approach is to always break out issues as hardware or software based, split. Meaning if nothing in the hardware has changed, at all, including firmware, drivers, etc. Look to the entire software stack applicable. #1 Know what you don't know... i.e. make no assumptions, at all.

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