# Error start node-red

**URL:** <https://discourse.nodered.org/t/error-start-node-red/42820>\
**Category:** General\
**Created:** [18 March 2021 13:56 UTC](https://discourse.nodered.org/t/error-start-node-red/42820 "2021-03-18T13:56:07Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![TE\_developer](https://avatars.discourse-cdn.com/v4/letter/t/71c47a/32.png) [@TE\_developer](https://discourse.nodered.org/u/TE_developer)\
**Post date:** [18 March 2021 13:56 UTC](https://discourse.nodered.org/t/error-start-node-red/42820/1 "2021-03-18T13:56:08Z")

</div>

Good morning,  
can anyone help me on the following error?  
I have tried to uninstall everything and reinstall by following various guides but the problem persists.  
Thanks so much

PS C:\Users\User\> node --version; npm --version  
v14.16.0  
6.14.11  
PS C:\Users\User\> node-red start  
18 Mar 14:44:40 - [info]

# Welcome to Node-RED

18 Mar 14:44:40 - [info] Node-RED version: v1.2.9  
18 Mar 14:44:40 - [info] Node.js version: v14.16.0  
18 Mar 14:44:40 - [info] Windows\_NT 10.0.19042 x64 LE  
18 Mar 14:44:40 - [info] Loading palette nodes  
18 Mar 14:44:41 - [error] Failed to start server:  
18 Mar 14:44:41 - [error] TypeError: Cannot read property 'forEach' of undefined  
at Object.addModule (C:\Users\User\AppData\Roaming\npm\node\_modules\node-red\node\_modules@node-red\registry\lib\registry.js:186:27)  
at C:\Users\User\AppData\Roaming\npm\node\_modules\node-red\node\_modules@node-red\registry\lib\loader.js:108:30  
at tryCatchReject (C:\Users\User\AppData\Roaming\npm\node\_modules\node-red\node\_modules\when\lib\makePromise.js:845:30)  
at runContinuation1 (C:\Users\User\AppData\Roaming\npm\node\_modules\node-red\node\_modules\when\lib\makePromise.js:804:4)  
at Fulfilled.when (C:\Users\User\AppData\Roaming\npm\node\_modules\node-red\node\_modules\when\lib\makePromise.js:592:4)  
at Pending.run (C:\Users\User\AppData\Roaming\npm\node\_modules\node-red\node\_modules\when\lib\makePromise.js:483:13)  
at Scheduler.\_drain (C:\Users\User\AppData\Roaming\npm\node\_modules\node-red\node\_modules\when\lib\Scheduler.js:62:19)  
at Scheduler.drain (C:\Users\User\AppData\Roaming\npm\node\_modules\node-red\node\_modules\when\lib\Scheduler.js:27:9)  
at processTicksAndRejections (internal/process/task\_queues.js:75:11)  
PS C:\Users\User\>

Denis DS

---

<div class="post-metadata">

**Author:** ![knolleary](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/knolleary/32/3_2.png) [@knolleary](https://discourse.nodered.org/u/knolleary)\
**Post date:** [18 March 2021 14:00 UTC](https://discourse.nodered.org/t/error-start-node-red/42820/2 "2021-03-18T14:00:59Z")

</div>

Hi @TE_developer

have you installed any extra nodes, or perhaps been developing your own?

This error can happen when Node-RED loads a Node module that is missing its html file.

---

<div class="post-metadata">

**Author:** ![TE\_developer](https://avatars.discourse-cdn.com/v4/letter/t/71c47a/32.png) [@TE\_developer](https://discourse.nodered.org/u/TE_developer)\
**Post date:** [18 March 2021 14:06 UTC](https://discourse.nodered.org/t/error-start-node-red/42820/3 "2021-03-18T14:06:38Z")

</div>

Hi @knolleary,  
previously I had installed node red but it gave an error in installing the modules.  
So I deleted, in theory, and reinstalled everything.  
Is there any specific command to redo a clean install?

---

<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:** [18 March 2021 15:27 UTC](https://discourse.nodered.org/t/error-start-node-red/42820/4 "2021-03-18T15:27:31Z")

</div>

> [@TE\_developer](#):
>
> C:\Users\User\> node-red start

Also (but probably not the cause of the error) that command attempts to start node-red using a flows file called `start`. You mean either `node-red` or `node-red-start` (I don't know if that is valid for windows).

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [17 May 2021 15:27 UTC](https://discourse.nodered.org/t/error-start-node-red/42820/5 "2021-05-17T15:27:48Z")

</div>

This topic was automatically closed 60 days after the last reply. New replies are no longer allowed.