# Flow does not start

**URL:** <https://discourse.nodered.org/t/flow-does-not-start/17897>\
**Category:** Dashboard\
**Created:** [13 November 2019 14:28 UTC](https://discourse.nodered.org/t/flow-does-not-start/17897 "2019-11-13T14:28:00Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![jbaben](https://avatars.discourse-cdn.com/v4/letter/j/bc79bd/32.png) [@jbaben](https://discourse.nodered.org/u/jbaben)\
**Post date:** [13 November 2019 14:28 UTC](https://discourse.nodered.org/t/flow-does-not-start/17897/1 "2019-11-13T14:28:00Z")

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Hello,

I downloaded the flow "PWM Control LED" from the Node-Red page [[https://flows.nodered.org/?term=gpio&num\_pages=1](https://flows.nodered.org/?term=gpio&num_pages=1)] and imported:  
But if I will start the flow with: "localhost:1880/ui" I get the message:  
"Please add some UI nodes to your flow and redeploy."  
and with F12:

```auto
You are using the ngTouch module. 
AngularJS Material already has mobile click, tap, and swipe support... 
ngTouch is not supported with AngularJS Material! app.min.js:148:303
Rendered http://192.168.1.13:1880/ui/css/app.min.less successfully. app.min.js:532:12831
CSS for http://192.168.1.13:1880/ui/css/app.min.less generated in 396ms app.min.js:532:12831
Less has finished. CSS generated in 396ms app.min.js:532:12831
Source-Map-Fehler: Error: request failed with status 404
Ressourcen-Adresse: http://192.168.1.13:1880/ui/js/app.min.js
Source-Map-Adresse: angular-chart.min.js.map

```

Version:  
nodejs = 12.13.0  
node-red = 1.0.2  
Raspberry = Raspian buster

Kind Regards  
Juergen B.

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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:** [13 November 2019 15:36 UTC](https://discourse.nodered.org/t/flow-does-not-start/17897/2 "2019-11-13T15:36:35Z")

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That flow has not got any dashboard nodes to display anything, so there is isn't anything to display. All it does is drive a gpio pin to various values by clicking the inject nodes.

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<div class="post-metadata">

**Author:** ![jbaben](https://avatars.discourse-cdn.com/v4/letter/j/bc79bd/32.png) [@jbaben](https://discourse.nodered.org/u/jbaben)\
**Post date:** [13 November 2019 16:03 UTC](https://discourse.nodered.org/t/flow-does-not-start/17897/3 "2019-11-13T16:03:21Z")

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Hello,  
thank you for your answer.  
Now I see clearly.  
I did not know that with the "dashboard node".

Kind Regards  
Juergen B.