# Error after nodes reinstalled

**URL:** <https://discourse.nodered.org/t/error-after-nodes-reinstalled/52182>\
**Category:** General\
**Tags:** node-red-dashboard\
**Created:** [13 October 2021 21:30 UTC](https://discourse.nodered.org/t/error-after-nodes-reinstalled/52182 "2021-10-13T21:30:33Z")\
**Posts on this page:** 13\
**Page:** 1

<div class="post-metadata">

**Author:** ![puteramelaka](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/puteramelaka/32/45520_2.png) [@puteramelaka](https://discourse.nodered.org/u/puteramelaka)\
**Post date:** [13 October 2021 21:30 UTC](https://discourse.nodered.org/t/error-after-nodes-reinstalled/52182/1 "2021-10-13T21:30:33Z")

</div>

hello friends, recently out of sudden the flow of node-red is not working due to missing nodes

 ![image](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/7/1/71ca029df731abba637f0258698e1d74d4f0db6a.png)

after i have installed and deploy the nodes is missing, when i add up the nodes i guess error occured.

 ![image](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/d/2/d27c99f03636c45ec77cd6a1e7542872515bc258.png)

```auto
[{"id":"64915f5c.0a7238","type":"change","z":"fade33b0.31dc2","name":"","rules":[{"t":"set","p":"payload","pt":"msg","to":"\"X-AXIS,\" & $$.payload.`X-AXIS` & $moment().tz(\"Asia/Kuala_Lumpur\").format(\",DD/MM/YYYY,h:mm:ss a\")","tot":"jsonata"}],"action":"","property":"","from":"","to":"","reg":false,"x":540,"y":280,"wires":[["55a1aba7.7cb53c","8258bfd2.d739a"]]},{"id":"85bcb7f0.7b1cc8","type":"change","z":"fade33b0.31dc2","name":"","rules":[{"t":"set","p":"payload","pt":"msg","to":"\"Y-AXIS,\" & $$.payload.`Y-AXIS` & $moment().tz(\"Asia/Kuala_Lumpur\").format(\",DD/MM/YYYY,h:mm:ss a\")","tot":"jsonata"}],"action":"","property":"","from":"","to":"","reg":false,"x":540,"y":340,"wires":[["8258bfd2.d739a","a2609af6.5d05b"]]},{"id":"258a1d49.c7bce2","type":"change","z":"fade33b0.31dc2","name":"","rules":[{"t":"set","p":"payload","pt":"msg","to":"\"Z-AXIS,\" & $$.payload.`Z-AXIS` & $moment().tz(\"Asia/Kuala_Lumpur\").format(\",DD/MM/YYYY,h:mm:ss a\")","tot":"jsonata"}],"action":"","property":"","from":"","to":"","reg":false,"x":540,"y":400,"wires":[["8258bfd2.d739a","90b1a43d.e74fa"]]},{"id":"8258bfd2.d739a","type":"debug","z":"fade33b0.31dc2","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","statusVal":"","statusType":"auto","x":810,"y":220,"wires":[]},{"id":"55a1aba7.7cb53c","type":"file","z":"fade33b0.31dc2","name":"","filename":"C:\\Users\\User\\Desktop\\x-axis.csv","appendNewline":true,"createDir":false,"overwriteFile":"false","encoding":"utf8","x":860,"y":280,"wires":[[]]},{"id":"a2609af6.5d05b","type":"file","z":"fade33b0.31dc2","name":"","filename":"C:\\Users\\User\\Desktop\\y-axis.csv","appendNewline":true,"createDir":false,"overwriteFile":"false","encoding":"utf8","x":860,"y":340,"wires":[[]]},{"id":"90b1a43d.e74fa","type":"file","z":"fade33b0.31dc2","name":"","filename":"C:\\Users\\User\\Desktop\\z-axis.csv","appendNewline":true,"createDir":false,"overwriteFile":"false","encoding":"utf8","x":860,"y":400,"wires":[[]]},{"id":"3124b708.80021","type":"mqtt in","z":"fade33b0.31dc2","name":"","topic":"SENSE","qos":"0","datatype":"json","broker":"277379c9.ca83a6","nl":false,"rap":true,"rh":0,"x":110,"y":500,"wires":[["64915f5c.0a7238","85bcb7f0.7b1cc8","258a1d49.c7bce2","6430742ae59fd37d","5862e4c958c9a421","b755f639bb350978"]]},{"id":"6430742ae59fd37d","type":"ui_gauge","z":"fade33b0.31dc2","name":"","group":"789a278d.b59438","order":1,"width":0,"height":0,"gtype":"gage","title":"X-AXIS","label":"units","format":"{{value}}","min":0,"max":10,"colors":["#00b500","#e6e600","#ca3838"],"seg1":"","seg2":"","className":"","x":500,"y":560,"wires":[]},{"id":"5862e4c958c9a421","type":"ui_gauge","z":"fade33b0.31dc2","name":"","group":"789a278d.b59438","order":2,"width":0,"height":0,"gtype":"gage","title":"Y-AXIS","label":"units","format":"{{value}}","min":0,"max":10,"colors":["#00b500","#e6e600","#ca3838"],"seg1":"","seg2":"","className":"","x":500,"y":640,"wires":[]},{"id":"b755f639bb350978","type":"ui_gauge","z":"fade33b0.31dc2","name":"","group":"789a278d.b59438","order":3,"width":0,"height":0,"gtype":"gage","title":"Z-AXIS","label":"units","format":"{{value}}","min":0,"max":10,"colors":["#00b500","#e6e600","#ca3838"],"seg1":"","seg2":"","className":"","x":500,"y":720,"wires":[]},{"id":"277379c9.ca83a6","type":"mqtt-broker","name":"","broker":"broker.hivemq.com","port":"1883","clientid":"","usetls":false,"protocolVersion":"4","keepalive":"60","cleansession":true,"birthTopic":"","birthQos":"0","birthPayload":"","birthMsg":{},"closeTopic":"","closeQos":"0","closePayload":"","closeMsg":{},"willTopic":"","willQos":"0","willPayload":"","willMsg":{},"sessionExpiry":""},{"id":"789a278d.b59438","type":"ui_group","name":"X-AXIS","tab":"5736cae9.f98874","order":2,"disp":true,"width":"6","collapse":false},{"id":"5736cae9.f98874","type":"ui_tab","name":"Home","icon":"dashboard","disabled":false,"hidden":false}]

```

could anybody help to look at it,,also im trying to make line chart (above is gauge chart )..

 ![image](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/4/f/4fa88d72796db0ed0c2479cd2138f5e72e9d48a8.png)  
something like this image or any type of line chart

---

<div class="post-metadata">

**Author:** ![zenofmud](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/zenofmud/32/316_2.png) [@zenofmud](https://discourse.nodered.org/u/zenofmud)\
**Post date:** [14 October 2021 09:44 UTC](https://discourse.nodered.org/t/error-after-nodes-reinstalled/52182/2 "2021-10-14T09:44:47Z")

</div>

1. Please stop/start node red and then copy the startup log and paste it to a reply.

2. what nodes did you install?

---

<div class="post-metadata">

**Author:** ![puteramelaka](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/puteramelaka/32/45520_2.png) [@puteramelaka](https://discourse.nodered.org/u/puteramelaka)\
**Post date:** [14 October 2021 10:47 UTC](https://discourse.nodered.org/t/error-after-nodes-reinstalled/52182/3 "2021-10-14T10:47:25Z")

</div>

> [@zenofmud](#):
>
> Please stop/start node red and then copy the startup log and paste it to a reply.

```auto
[{"id":"64915f5c.0a7238","type":"change","z":"fade33b0.31dc2","name":"","rules":[{"t":"set","p":"payload","pt":"msg","to":"\"X-AXIS,\" & $$.payload.`X-AXIS` & $moment().tz(\"Asia/Kuala_Lumpur\").format(\",DD/MM/YYYY,h:mm:ss a\")","tot":"jsonata"}],"action":"","property":"","from":"","to":"","reg":false,"x":540,"y":280,"wires":[["55a1aba7.7cb53c","8258bfd2.d739a"]]},{"id":"85bcb7f0.7b1cc8","type":"change","z":"fade33b0.31dc2","name":"","rules":[{"t":"set","p":"payload","pt":"msg","to":"\"Y-AXIS,\" & $$.payload.`Y-AXIS` & $moment().tz(\"Asia/Kuala_Lumpur\").format(\",DD/MM/YYYY,h:mm:ss a\")","tot":"jsonata"}],"action":"","property":"","from":"","to":"","reg":false,"x":540,"y":340,"wires":[["8258bfd2.d739a","a2609af6.5d05b"]]},{"id":"258a1d49.c7bce2","type":"change","z":"fade33b0.31dc2","name":"","rules":[{"t":"set","p":"payload","pt":"msg","to":"\"Z-AXIS,\" & $$.payload.`Z-AXIS` & $moment().tz(\"Asia/Kuala_Lumpur\").format(\",DD/MM/YYYY,h:mm:ss a\")","tot":"jsonata"}],"action":"","property":"","from":"","to":"","reg":false,"x":540,"y":400,"wires":[["8258bfd2.d739a","90b1a43d.e74fa"]]},{"id":"8258bfd2.d739a","type":"debug","z":"fade33b0.31dc2","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","statusVal":"","statusType":"auto","x":810,"y":220,"wires":[]},{"id":"55a1aba7.7cb53c","type":"file","z":"fade33b0.31dc2","name":"","filename":"C:\\Users\\User\\Desktop\\x-axis.csv","appendNewline":true,"createDir":false,"overwriteFile":"false","encoding":"utf8","x":860,"y":280,"wires":[[]]},{"id":"a2609af6.5d05b","type":"file","z":"fade33b0.31dc2","name":"","filename":"C:\\Users\\User\\Desktop\\y-axis.csv","appendNewline":true,"createDir":false,"overwriteFile":"false","encoding":"utf8","x":860,"y":340,"wires":[[]]},{"id":"90b1a43d.e74fa","type":"file","z":"fade33b0.31dc2","name":"","filename":"C:\\Users\\User\\Desktop\\z-axis.csv","appendNewline":true,"createDir":false,"overwriteFile":"false","encoding":"utf8","x":860,"y":400,"wires":[[]]},{"id":"3124b708.80021","type":"mqtt in","z":"fade33b0.31dc2","name":"","topic":"SENSE","qos":"0","datatype":"json","broker":"277379c9.ca83a6","nl":false,"rap":true,"rh":0,"x":110,"y":500,"wires":[["64915f5c.0a7238","85bcb7f0.7b1cc8","258a1d49.c7bce2","6430742ae59fd37d","5862e4c958c9a421","b755f639bb350978"]]},{"id":"6430742ae59fd37d","type":"ui_gauge","z":"fade33b0.31dc2","name":"","group":"789a278d.b59438","order":1,"width":0,"height":0,"gtype":"gage","title":"X-AXIS","label":"units","format":"{{value}}","min":0,"max":10,"colors":["#00b500","#e6e600","#ca3838"],"seg1":"","seg2":"","className":"","x":500,"y":560,"wires":[]},{"id":"5862e4c958c9a421","type":"ui_gauge","z":"fade33b0.31dc2","name":"","group":"789a278d.b59438","order":2,"width":0,"height":0,"gtype":"gage","title":"Y-AXIS","label":"units","format":"{{value}}","min":0,"max":10,"colors":["#00b500","#e6e600","#ca3838"],"seg1":"","seg2":"","className":"","x":500,"y":640,"wires":[]},{"id":"b755f639bb350978","type":"ui_gauge","z":"fade33b0.31dc2","name":"","group":"789a278d.b59438","order":3,"width":0,"height":0,"gtype":"gage","title":"Z-AXIS","label":"units","format":"{{value}}","min":0,"max":10,"colors":["#00b500","#e6e600","#ca3838"],"seg1":"","seg2":"","className":"","x":500,"y":720,"wires":[]},{"id":"277379c9.ca83a6","type":"mqtt-broker","name":"","broker":"broker.hivemq.com","port":"1883","clientid":"","usetls":false,"protocolVersion":"4","keepalive":"60","cleansession":true,"birthTopic":"","birthQos":"0","birthPayload":"","birthMsg":{},"closeTopic":"","closeQos":"0","closePayload":"","closeMsg":{},"willTopic":"","willQos":"0","willPayload":"","willMsg":{},"sessionExpiry":""},{"id":"789a278d.b59438","type":"ui_group","name":"X-AXIS","tab":"5736cae9.f98874","order":2,"disp":true,"width":"6","collapse":false},{"id":"5736cae9.f98874","type":"ui_tab","name":"Home","icon":"dashboard","disabled":false,"hidden":false}]

```

> [@zenofmud](#):
>
> what nodes did you install?

i reinstall dashboard nodes ,to show the gauge/graph

 ![image](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/0/d/0d5740fce59e1447220bf573570ae03f0178d056.png)

---

<div class="post-metadata">

**Author:** ![zenofmud](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/zenofmud/32/316_2.png) [@zenofmud](https://discourse.nodered.org/u/zenofmud)\
**Post date:** [14 October 2021 12:57 UTC](https://discourse.nodered.org/t/error-after-nodes-reinstalled/52182/4 "2021-10-14T12:57:52Z")

</div>

It looks like you posted your flow not the start up log. Please post the log.

---

<div class="post-metadata">

**Author:** ![puteramelaka](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/puteramelaka/32/45520_2.png) [@puteramelaka](https://discourse.nodered.org/u/puteramelaka)\
**Post date:** [14 October 2021 13:07 UTC](https://discourse.nodered.org/t/error-after-nodes-reinstalled/52182/5 "2021-10-14T13:07:33Z")

</div>

im so sorry for the inconvenience caused(still a beginner).. im not sure which one is log, is it as in the picture? under view option the event log?

 ![image](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/9/3/9309a56a79f6ba8e73bdba3393a316eb553f0d2a.png)

 ![image](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/5/6/56824ca9774bf5ed0e4adacda5613a4e73a68394.png)

```auto
2021-10-14T12:11:10.337Z Install : node-red-contrib-machine-learning-v2 1.0.9

2021-10-14T12:11:10.662Z npm.cmd install --no-audit --no-update-notifier --no-fund --save --save-prefix=~ --production --engine-strict node-red-contrib-machine-learning-v2@1.0.9
2021-10-14T12:11:23.179Z [out] 
2021-10-14T12:11:23.179Z [out] added 6 packages in 12s
2021-10-14T12:11:23.199Z rc=0

```

---

<div class="post-metadata">

**Author:** ![zenofmud](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/zenofmud/32/316_2.png) [@zenofmud](https://discourse.nodered.org/u/zenofmud)\
**Post date:** [14 October 2021 13:57 UTC](https://discourse.nodered.org/t/error-after-nodes-reinstalled/52182/6 "2021-10-14T13:57:46Z")

</div>

How do you start node-red?  
On a pi you open a terminal and enter ‘node-red’ and node-red will start running outputting information. That is the startup log I want to see.

---

<div class="post-metadata">

**Author:** ![puteramelaka](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/puteramelaka/32/45520_2.png) [@puteramelaka](https://discourse.nodered.org/u/puteramelaka)\
**Post date:** [14 October 2021 14:19 UTC](https://discourse.nodered.org/t/error-after-nodes-reinstalled/52182/7 "2021-10-14T14:19:42Z")

</div>

im using windows and start using command prompt, here is the startup log

 ![image](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/e/d/ed86ce51b6df98c5ad15fea4da38f80e02fbbfde.png)

---

<div class="post-metadata">

**Author:** ![zenofmud](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/zenofmud/32/316_2.png) [@zenofmud](https://discourse.nodered.org/u/zenofmud)\
**Post date:** [14 October 2021 14:45 UTC](https://discourse.nodered.org/t/error-after-nodes-reinstalled/52182/8 "2021-10-14T14:45:36Z")

</div>

Good, that is what I wanted to see. It looks like your gauges are working at this point. Now for a chart you need to add in ui-chart. Have you tried that?

Here is one example of how charts work,

```auto
[{"id":"47c2da400933b75f","type":"tab","label":"Flow 2","disabled":false,"info":""},{"id":"c91197a9.1b0818","type":"inject","z":"47c2da400933b75f","name":"","repeat":"1","crontab":"","once":false,"topic":"","payload":"","payloadType":"date","x":150,"y":100,"wires":[["53a7b7d0.a82148","1b00715a.fd86cf"]]},{"id":"5ae57209.00e5ac","type":"ui_switch","z":"47c2da400933b75f","name":"Choice1","label":"{{msg.label1}}","group":"d3390420.783878","order":3,"width":0,"height":0,"passthru":true,"decouple":"false","topic":"","style":"","onvalue":"true","onvalueType":"bool","onicon":"","oncolor":"","offvalue":"false","offvalueType":"bool","officon":"","offcolor":"","x":380,"y":280,"wires":[["a9110e08.3f754"]]},{"id":"53a7b7d0.a82148","type":"function","z":"47c2da400933b75f","name":"thai Date","func":"function thaiDate(date) {\n var monthName = [\n \"January\", \"February\", \"March\",\n \"April\", \"May\", \"June\", \"July\",\n \"August\", \"September\", \"October\",\n \"November\", \"December\"\n];\n\n var day = date.getDate();\n var monthIndex = date.getMonth();\n var year = date.getFullYear()+543;\n\n return day + ' ' + monthName[monthIndex] + ' ' + year;\n}\n\nvar d = new Date(msg.payload);\nmsg.payload =thaiDate(d) + ' ' + d.toLocaleTimeString();\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":220,"y":160,"wires":[["3c20cd84.3e6892","ddc0d4.8190bf3"]]},{"id":"3c20cd84.3e6892","type":"ui_text","z":"47c2da400933b75f","group":"d3390420.783878","order":1,"width":0,"height":0,"name":"time","label":"{{msg.payload}}","format":"","layout":"col-center","className":"","x":370,"y":200,"wires":[]},{"id":"ddc0d4.8190bf3","type":"debug","z":"47c2da400933b75f","name":"","active":true,"console":"false","complete":"payload","x":390,"y":160,"wires":[]},{"id":"1b00715a.fd86cf","type":"function","z":"47c2da400933b75f","name":"set Label","func":"msg.label1='Test Choice1';\nmsg.label2='Test Choice2';\nmsg.label3='Test Choice3';\nreturn msg;","outputs":1,"noerr":0,"x":220,"y":280,"wires":[["5ae57209.00e5ac","9a227703.8617c8","42081181.74a09"]]},{"id":"9a227703.8617c8","type":"ui_switch","z":"47c2da400933b75f","name":"Choice2","label":"{{msg.label2}}","group":"d3390420.783878","order":4,"width":0,"height":0,"passthru":true,"decouple":"false","topic":"","style":"","onvalue":"true","onvalueType":"bool","onicon":"","oncolor":"","offvalue":"false","offvalueType":"bool","officon":"","offcolor":"","x":380,"y":320,"wires":[["d723bf24.96d7"]]},{"id":"42081181.74a09","type":"ui_switch","z":"47c2da400933b75f","name":"Choice3","label":"{{msg.label3}}","group":"d3390420.783878","order":5,"width":0,"height":0,"passthru":true,"decouple":"false","topic":"","style":"","onvalue":"true","onvalueType":"bool","onicon":"","oncolor":"","offvalue":"false","offvalueType":"bool","officon":"","offcolor":"","x":380,"y":360,"wires":[["81017ea0.3fe91"]]},{"id":"a9110e08.3f754","type":"function","z":"47c2da400933b75f","name":"msg1","func":"var msg1={};\nif (msg.payload===true) {\n msg1.payload = Math.round(Math.random()*100);\n msg1.topic = msg.label1;\nreturn msg1;\n}","outputs":1,"noerr":0,"x":530,"y":280,"wires":[["d4a52bb0.f0f188"]]},{"id":"d723bf24.96d7","type":"function","z":"47c2da400933b75f","name":"msg2","func":"var msg2={};\nif (msg.payload===true) {\n msg2.payload = Math.round(Math.random()*100);\n msg2.topic = msg.label2;\nreturn msg2;\n}","outputs":1,"noerr":0,"x":530,"y":320,"wires":[["d4a52bb0.f0f188"]]},{"id":"81017ea0.3fe91","type":"function","z":"47c2da400933b75f","name":"msg3","func":"var msg3={};\nif (msg.payload===true) {\n msg3.payload = Math.round(Math.random()*100);\n msg3.topic = msg.label3;\nreturn msg3;\n}","outputs":1,"noerr":0,"x":530,"y":360,"wires":[["d4a52bb0.f0f188"]]},{"id":"d4a52bb0.f0f188","type":"ui_chart","z":"47c2da400933b75f","name":"","group":"faee512b.7f9bb","order":0,"width":0,"height":0,"label":"chart","chartType":"line","legend":"false","xformat":"HH:mm:ss","interpolate":"linear","nodata":"","dot":false,"ymin":"","ymax":"","removeOlder":"1","removeOlderPoints":"","removeOlderUnit":"60","cutout":0,"useOneColor":false,"colors":["#1f77b4","#aec7e8","#ff7f0e","#2ca02c","#98df8a","#d62728","#ff9896","#9467bd","#c5b0d5"],"outputs":2,"x":690,"y":320,"wires":[[],[]]},{"id":"46399bdc.041db4","type":"function","z":"47c2da400933b75f","name":"reset chart","func":"msg.payload=[];\nreturn msg;","outputs":1,"noerr":0,"x":550,"y":440,"wires":[["d4a52bb0.f0f188"]]},{"id":"9a3fcaad.2112b8","type":"ui_button","z":"47c2da400933b75f","name":"","group":"d3390420.783878","order":0,"width":0,"height":0,"passthru":false,"label":"reset chart","color":"","bgcolor":"","icon":"","payload":"","payloadType":"str","topic":"","x":390,"y":440,"wires":[["46399bdc.041db4"]]},{"id":"d3390420.783878","type":"ui_group","name":"Group1","tab":"5ec074b0.493abc","order":2,"disp":true,"width":"5"},{"id":"faee512b.7f9bb","type":"ui_group","name":"Group 2","tab":"5ec074b0.493abc","order":2,"disp":true,"width":"15"},{"id":"5ec074b0.493abc","type":"ui_tab","name":"example ui_chart","icon":"dashboard"}]

```

---

<div class="post-metadata">

**Author:** ![puteramelaka](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/puteramelaka/32/45520_2.png) [@puteramelaka](https://discourse.nodered.org/u/puteramelaka)\
**Post date:** [14 October 2021 15:38 UTC](https://discourse.nodered.org/t/error-after-nodes-reinstalled/52182/9 "2021-10-14T15:38:06Z")

</div>

well, its quite complex example 😅

however i noticed that something is wrong with my node-red..everytime i get error including running the example provided..

 ![image](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/4/5/455a7ddbcacb1824ca970db3a43a81e890c1cb53.png)

is this software issue or did i miss anything ☹ ☹

---

<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:** [14 October 2021 18:05 UTC](https://discourse.nodered.org/t/error-after-nodes-reinstalled/52182/10 "2021-10-14T18:05:10Z")

</div>

Click on the node id above the error and it will take you to the node showing the error. One of them is called decision tree classifier trainer.

---

<div class="post-metadata">

**Author:** ![puteramelaka](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/puteramelaka/32/45520_2.png) [@puteramelaka](https://discourse.nodered.org/u/puteramelaka)\
**Post date:** [15 October 2021 08:36 UTC](https://discourse.nodered.org/t/error-after-nodes-reinstalled/52182/11 "2021-10-15T08:36:27Z")

</div>

> [@Colin](#):
>
> Click on the node id above the error and it will take you to the node showing the error. One of them is called decision tree classifier trainer.

thanks i manage to find the error

> [@zenofmud](#):
>
> Here is one example of how charts work,

the graph works ,thanks alot..i will try to study and make one

---

<div class="post-metadata">

**Author:** ![zenofmud](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/zenofmud/32/316_2.png) [@zenofmud](https://discourse.nodered.org/u/zenofmud)\
**Post date:** [15 October 2021 09:46 UTC](https://discourse.nodered.org/t/error-after-nodes-reinstalled/52182/12 "2021-10-15T09:46:16Z")

</div>

I recommend watching this playlist: [Node-RED Essentials](https://www.youtube.com/playlist?list=PLyNBB9VCLmo1hyO-4fIZ08gqFcXBkHy-6). The videos are done by the developers of node-red. They're nice & short and to the point. You will understand a whole lot more in about 1 hour. A small investment for a lot of gain.

---

<div class="post-metadata">

**Author:** ![puteramelaka](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/puteramelaka/32/45520_2.png) [@puteramelaka](https://discourse.nodered.org/u/puteramelaka)\
**Post date:** [15 October 2021 11:17 UTC](https://discourse.nodered.org/t/error-after-nodes-reinstalled/52182/13 "2021-10-15T11:17:05Z")

</div>

thanks alot i already did watch halfway