# Latest

**URL:** https://discourse.nodered.org/latest.md?page=1272

[Latest](https://discourse.nodered.org/latest.md) · [Categories](https://discourse.nodered.org/categories.md) · [Tags](https://discourse.nodered.org/tags.md)

**Page:** 1273

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## [A firefighter training flow for timed competitions with ultrasonic depth sensors and event logging](https://discourse.nodered.org/t/a-firefighter-training-flow-for-timed-competitions-with-ultrasonic-depth-sensors-and-event-logging/11684)

<div class="topic-metadata">

**Author:** [@kocherjj](https://discourse.nodered.org/u/kocherjj)\
**Replies:** 6\
**Last updated:** [1 June 2019 23:37 UTC](https://discourse.nodered.org/t/a-firefighter-training-flow-for-timed-competitions-with-ultrasonic-depth-sensors-and-event-logging/11684 "2019-06-01T23:37:30Z")

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Hello all, Hopefully this works and formats properly. This is my first Node-Red project and I know it's rather large but if anyone feels like taking a look at it and providing constructive feedback I'd appreciate it. I …

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## [Sensor trigger camera issue](https://discourse.nodered.org/t/sensor-trigger-camera-issue/11567)

<div class="topic-metadata">

**Author:** [@mshaz](https://discourse.nodered.org/u/mshaz)\
**Replies:** 2\
**Last updated:** [1 June 2019 21:29 UTC](https://discourse.nodered.org/t/sensor-trigger-camera-issue/11567 "2019-06-01T21:29:53Z")

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Hi I need help , I have a sensor that triggers camera when value is high but since i get the data by polling every few seconds, it will keep on triggering the camera while sensors are high state. I only want to trigger…

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## [IoT readings not returned to zero when no power](https://discourse.nodered.org/t/iot-readings-not-returned-to-zero-when-no-power/11756)

<div class="topic-metadata">

**Author:** [@mshaz](https://discourse.nodered.org/u/mshaz)\
**Replies:** 1\
**Last updated:** [1 June 2019 21:29 UTC](https://discourse.nodered.org/t/iot-readings-not-returned-to-zero-when-no-power/11756 "2019-06-01T21:29:35Z")

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Hi I have data coming from thingspeak and when I pull the power off the data not returned to zero bcos of delay in sending data to node-red platform. How do I fix this ?

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## [Dynamic Last points lineal chart](https://discourse.nodered.org/t/dynamic-last-points-lineal-chart/11750)

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**Author:** [@emanavas](https://discourse.nodered.org/u/emanavas)\
**Replies:** 1\
**Last updated:** [1 June 2019 19:12 UTC](https://discourse.nodered.org/t/dynamic-last-points-lineal-chart/11750 "2019-06-01T19:12:24Z")

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Hi, I'm plotting realtime information from Arduino in a Lineal Chart but I want decide how many last points see in tha chart with a Slider or similiar. ¿How can I do that?. Thanks.

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## [Testing the trigger node](https://discourse.nodered.org/t/testing-the-trigger-node/11752)

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**Author:** [@Andrei](https://discourse.nodered.org/u/Andrei)\
**Replies:** 2\
**Last updated:** [1 June 2019 19:06 UTC](https://discourse.nodered.org/t/testing-the-trigger-node/11752 "2019-06-01T19:06:00Z")

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I am running Node-REd v1 beta.2. I wonder if anyone can do a real quick testing to double check the behavior of the trigger node. I noticed that the blue square indicator in the trigger node will appear only the very fi…

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## [Node-red docker gui wont load after updating module(s)](https://discourse.nodered.org/t/node-red-docker-gui-wont-load-after-updating-module-s/11744)

<div class="topic-metadata">

**Author:** [@marcusone](https://discourse.nodered.org/u/marcusone)\
**Replies:** 5\
**Last updated:** [1 June 2019 16:50 UTC](https://discourse.nodered.org/t/node-red-docker-gui-wont-load-after-updating-module-s/11744 "2019-06-01T16:50:16Z")

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Running node-red via docker (latest) and up to date as of April last release (v0.20.5). Works fine, however, went to update my modules, even just doing one, causes node-red to fail to load again, and I have to revert ba…

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## [Node-red performance with and without the editor](https://discourse.nodered.org/t/node-red-performance-with-and-without-the-editor/11717)

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**Author:** [@dennishvo](https://discourse.nodered.org/u/dennishvo)\
**Replies:** 3\
**Last updated:** [1 June 2019 06:36 UTC](https://discourse.nodered.org/t/node-red-performance-with-and-without-the-editor/11717 "2019-06-01T06:36:29Z")

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Is there a significant performance impact on flows by the mere fact that the node-red editor is running? I'm asking out of curiosity. If there's any documentation available that explains the interaction between nodejs an…

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## [Node-red-dashboard has gone blank](https://discourse.nodered.org/t/node-red-dashboard-has-gone-blank/11562)

<div class="topic-metadata">

**Author:** [@MWZotti](https://discourse.nodered.org/u/MWZotti)\
**Replies:** 6\
**Last updated:** [1 June 2019 06:13 UTC](https://discourse.nodered.org/t/node-red-dashboard-has-gone-blank/11562 "2019-06-01T06:13:09Z")

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My Node-Red dashboard UI has gone blank. There is nothing on the web page indicating what could be wrong and I see no errors in the log. Start Node-RED Once Node-RED has started, point a browser at http://192.168.1.26:…

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## [Help! Buffer array, SQL insert help](https://discourse.nodered.org/t/help-buffer-array-sql-insert-help/11737)

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**Author:** [@haroon-rehman](https://discourse.nodered.org/u/haroon-rehman)\
**Replies:** 1\
**Last updated:** [1 June 2019 05:43 UTC](https://discourse.nodered.org/t/help-buffer-array-sql-insert-help/11737 "2019-06-01T05:43:28Z")

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Help!!! Stuck on this for past 1 day! Hi I'm trying to save a buffer array to SQL msg.payload : buffer\[211584\] \[ 37, 80, 68, 70 ...\] I'm using the MSSQL node to insert this data in a table in the varbinary(max) colum…

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## [Trigger node help - please](https://discourse.nodered.org/t/trigger-node-help-please/11728)

<div class="topic-metadata">

**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 10\
**Last updated:** [1 June 2019 00:21 UTC](https://discourse.nodered.org/t/trigger-node-help-please/11728 "2019-06-01T00:21:18Z")

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Forgive me if I've asked this before, but from what I remember it was the DELAY node, not the TRIGGER node. Here's the part of the flow..... \[{"id":"178ae8cd.12b0d7","type":"trigger","z":"15af81c5.64999e","op1":"","op2…

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## [Changing Format in Dashboard Template Node?](https://discourse.nodered.org/t/changing-format-in-dashboard-template-node/11707)

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**Author:** [@tcontrada](https://discourse.nodered.org/u/tcontrada)\
**Replies:** 4\
**Last updated:** [31 May 2019 20:29 UTC](https://discourse.nodered.org/t/changing-format-in-dashboard-template-node/11707 "2019-05-31T20:29:48Z")

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I am using the Tableify Node with a Dashboard Template Node, but want to use the embedded formatting style within the table html contents. How can I over ride the Dashboard theme for this node only? Here is the HTML tha…

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## [Payload Timer preferably with UI](https://discourse.nodered.org/t/payload-timer-preferably-with-ui/11733)

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**Author:** [@Ianszh](https://discourse.nodered.org/u/Ianszh)\
**Replies:** 6\
**Last updated:** [31 May 2019 18:58 UTC](https://discourse.nodered.org/t/payload-timer-preferably-with-ui/11733 "2019-05-31T18:58:29Z")

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Hello, I have built yet another watering system which has 4 capacitive moisture sensors, 4 water solenoids, 1 pump, and 5 relays. Everything's working fine, the "brains" is Node Red and I'm sending the sensor readings …

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## [Ui text node:several lines possible using \\n?](https://discourse.nodered.org/t/ui-text-node-several-lines-possible-using-n/11734)

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**Author:** [@magouero](https://discourse.nodered.org/u/magouero)\
**Replies:** 2\
**Last updated:** [31 May 2019 17:49 UTC](https://discourse.nodered.org/t/ui-text-node-several-lines-possible-using-n/11734 "2019-05-31T17:49:32Z")

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Hello, in a dashboard text node i display stuff. Can i display a text on 2 (or more, why not) lines ? I tried sending "bla bla" + " \\n\\r" + "blibli" into the text node (in the payload from a function node) but it doe…

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## [PiSense HAT Disconnected - both ends!](https://discourse.nodered.org/t/pisense-hat-disconnected-both-ends/6935)

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**Author:** [@baqwas](https://discourse.nodered.org/u/baqwas)\
**Replies:** 9\
**Last updated:** [31 May 2019 16:44 UTC](https://discourse.nodered.org/t/pisense-hat-disconnected-both-ends/6935 "2019-05-31T16:44:36Z")

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Hello, The "connection lost" issue at https://discourse.nodered.org/t/node-red-connection-lost/1724 does not apply to my situation. I'm using node (v11.6.0) and npm (6.5.0-next.0) and stretch will all updates/upgrades a…

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## [Custom site icon on dashboard](https://discourse.nodered.org/t/custom-site-icon-on-dashboard/11724)

<div class="topic-metadata">

**Author:** [@allebarbieri](https://discourse.nodered.org/u/allebarbieri)\
**Replies:** 4\
**Last updated:** [31 May 2019 14:41 UTC](https://discourse.nodered.org/t/custom-site-icon-on-dashboard/11724 "2019-05-31T14:41:25Z")

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I am trying to figure out if it is possible to change the dashboard site icon instead of the red on white standard icon. It would be nice to have an additional "site icon" field on the dashboard "site" tab.

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## [Node Red Serial Com trouble](https://discourse.nodered.org/t/node-red-serial-com-trouble/11711)

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**Author:** [@ablinkin28](https://discourse.nodered.org/u/ablinkin28)\
**Replies:** 6\
**Last updated:** [31 May 2019 13:26 UTC](https://discourse.nodered.org/t/node-red-serial-com-trouble/11711 "2019-05-31T13:26:54Z")

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Hello this is my first post so let me know what info i am missing. I am currently using the node red serial nodes to communicate to a Haas machine to get data out. I am using node red on a RPI3 with a USB serial adapter.…

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## [Stopwatch event for a newbie](https://discourse.nodered.org/t/stopwatch-event-for-a-newbie/11696)

<div class="topic-metadata">

**Author:** [@orandaadnaro](https://discourse.nodered.org/u/orandaadnaro)\
**Replies:** 5\
**Last updated:** [31 May 2019 12:55 UTC](https://discourse.nodered.org/t/stopwatch-event-for-a-newbie/11696 "2019-05-31T12:55:47Z")

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I'm new to node red and javascript, so forgive me if this has already been covered elsewhere. Im trying to record the length of time a boiler is switched on. I intend to store and or display the duration into a graph (…

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## [SDE19\_MonitoringCompetition](https://discourse.nodered.org/t/sde19-monitoringcompetition/11730)

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**Author:** [@James](https://discourse.nodered.org/u/James)\
**Replies:** 1\
**Last updated:** [31 May 2019 12:50 UTC](https://discourse.nodered.org/t/sde19-monitoringcompetition/11730 "2019-05-31T12:50:02Z")

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The sensors gather the data from the surroundings and display in the Dashboard

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## [My Node has not been indexed by NodeFlow](https://discourse.nodered.org/t/my-node-has-not-been-indexed-by-nodeflow/11727)

<div class="topic-metadata">

**Author:** [@jmcanterafonseca](https://discourse.nodered.org/u/jmcanterafonseca)\
**Replies:** 2\
**Last updated:** [31 May 2019 12:04 UTC](https://discourse.nodered.org/t/my-node-has-not-been-indexed-by-nodeflow/11727 "2019-05-31T12:04:51Z")

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Hi there, any ideas about could be happening? Thanks

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## [RFID Tag Scanner to enable buttons/menus](https://discourse.nodered.org/t/rfid-tag-scanner-to-enable-buttons-menus/11695)

<div class="topic-metadata">

**Author:** [@lozzer65](https://discourse.nodered.org/u/lozzer65)\
**Replies:** 11\
**Last updated:** [31 May 2019 11:47 UTC](https://discourse.nodered.org/t/rfid-tag-scanner-to-enable-buttons-menus/11695 "2019-05-31T11:47:48Z")

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Hi I am trying to disable a button until an RFID tag is scanned with a valid code on it. I am struggling with this as I am fairly new to Node-Red. The RFID scanner acts just like a keyboard. I have had it scan into a …

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## [Custom UI node - client info to server](https://discourse.nodered.org/t/custom-ui-node-client-info-to-server/11713)

<div class="topic-metadata">

**Author:** [@BartButenaers](https://discourse.nodered.org/u/BartButenaers)\
**Replies:** 2\
**Last updated:** [31 May 2019 10:22 UTC](https://discourse.nodered.org/t/custom-ui-node-client-info-to-server/11713 "2019-05-31T10:22:36Z")

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Hi folks, Seems I'm suffering from severe brain damage, because I can't remember anymore how one of my older developments works: we had updated the dashboard audio node, to send the audio status ( playing, reset, error,…

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## [Interaction between node-red and nodejs app](https://discourse.nodered.org/t/interaction-between-node-red-and-nodejs-app/11656)

<div class="topic-metadata">

**Author:** [@hathemi](https://discourse.nodered.org/u/hathemi)\
**Replies:** 20\
**Last updated:** [31 May 2019 08:28 UTC](https://discourse.nodered.org/t/interaction-between-node-red-and-nodejs-app/11656 "2019-05-31T08:28:56Z")

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i have a NR flow contains an s7 node. Any tips to guide me how to display data sent from my flow to nodejs app ? i have tried this example https://nodered.org/docs/embedding and i'am stuck on how to use data sent from m…

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## [“msgpack” & “zlib” & “http” example](https://discourse.nodered.org/t/msgpack-zlib-http-example/11712)

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**Author:** [@ExpZeros](https://discourse.nodered.org/u/ExpZeros)\
**Replies:** 1\
**Last updated:** [31 May 2019 08:21 UTC](https://discourse.nodered.org/t/msgpack-zlib-http-example/11712 "2019-05-31T08:21:47Z")

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I would like to send a JSON package that gets “msgpack” and then compressed down using “zlib” down a post message to a server. I tried to find examples online (here in the forum and on the internet) and could not find o…

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## [\[ANNOUNCE\] Node-RED Desktop v0.8.8 Released](https://discourse.nodered.org/t/announce-node-red-desktop-v0-8-8-released/11461)

<div class="topic-metadata">

**Author:** [@sakazuki](https://discourse.nodered.org/u/sakazuki)\
**Replies:** 13\
**Last updated:** [31 May 2019 08:00 UTC](https://discourse.nodered.org/t/announce-node-red-desktop-v0-8-8-released/11461 "2019-05-31T08:00:54Z")

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Hi all, I have released Node-RED Desktop v0.8.8 . This is a desktop application of Node-RED for windows/mac. You can easily setup Node-RED on your desktop. with one click installer and auto updater quickly create…

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## [Npm error when installing beta](https://discourse.nodered.org/t/npm-error-when-installing-beta/11710)

<div class="topic-metadata">

**Author:** [@pvanklink](https://discourse.nodered.org/u/pvanklink)\
**Replies:** 2\
**Last updated:** [31 May 2019 07:58 UTC](https://discourse.nodered.org/t/npm-error-when-installing-beta/11710 "2019-05-31T07:58:38Z")

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Hi i installed node-red version v 0.20.5 on a raspberry pi 3b+ with the latest raspbian stretch desktop with this command: bash \<(curl -sL https://raw.githubusercontent.com/node-red/raspbian-deb-package/master/resource…

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## [Multiple Y axis in chart (line graph)](https://discourse.nodered.org/t/multiple-y-axis-in-chart-line-graph/1051)

<div class="topic-metadata">

**Author:** [@imadouino](https://discourse.nodered.org/u/imadouino)\
**Replies:** 4\
**Last updated:** [31 May 2019 06:01 UTC](https://discourse.nodered.org/t/multiple-y-axis-in-chart-line-graph/1051 "2019-05-31T06:01:10Z")

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Im looking to display multiple y axis on a chart with the chart in node-red: topic: 1 Ymin and Ymax (0-10) topic: 2 Ymin and Ymax (0-1000) Thank you for your help.

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## [How to get the node-red and drag the event of the node](https://discourse.nodered.org/t/how-to-get-the-node-red-and-drag-the-event-of-the-node/11661)

<div class="topic-metadata">

**Author:** [@limengsong](https://discourse.nodered.org/u/limengsong)\
**Replies:** 1\
**Last updated:** [29 May 2019 09:09 UTC](https://discourse.nodered.org/t/how-to-get-the-node-red-and-drag-the-event-of-the-node/11661 "2019-05-29T09:09:05Z")

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I want to get the node-red and drag the event of the node. such as: There are some nodes that can be dragged to the workspace, and some nodes are forbidden to drag to the workspace. Do not know how to judge? Request …

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## [Custom UI node - do stuff after rendering](https://discourse.nodered.org/t/custom-ui-node-do-stuff-after-rendering/11645)

<div class="topic-metadata">

**Author:** [@BartButenaers](https://discourse.nodered.org/u/BartButenaers)\
**Replies:** 9\
**Last updated:** [30 May 2019 22:19 UTC](https://discourse.nodered.org/t/custom-ui-node-do-stuff-after-rendering/11645 "2019-05-30T22:19:19Z")

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Hi folks, I'm developing a new custom UI node, which displays an SVG drawing that fills the available space: function HTML(config) { var configAsJson = JSON.stringify(config); var html = String.raw\` \<s…

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## [This is a new (weird) error](https://discourse.nodered.org/t/this-is-a-new-weird-error/3675)

<div class="topic-metadata">

**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 8\
**Last updated:** [30 May 2019 20:03 UTC](https://discourse.nodered.org/t/this-is-a-new-weird-error/3675 "2019-05-30T20:03:40Z")

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While optimising some flows, etc, I got this error: FileError: 'http://192.168.0.99:1880/ui/css/app.min.less' wasn't found (0) in app.min.less Google isn't that helpful. Anyone?

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## [Subflows stopped working suddenly](https://discourse.nodered.org/t/subflows-stopped-working-suddenly/11703)

<div class="topic-metadata">

**Author:** [@albydnc](https://discourse.nodered.org/u/albydnc)\
**Replies:** 6\
**Last updated:** [30 May 2019 19:41 UTC](https://discourse.nodered.org/t/subflows-stopped-working-suddenly/11703 "2019-05-30T19:41:18Z")

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Hi, today my subflows stopped working without any reason. This is the feedback from the console. NodeRED 0.19.6 on AWS EC2 Ubuntu instance TypeError: Cannot read property 'id' of undefined at createSubflow (/usr/lib/…

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