# Latest

**URL:** https://discourse.nodered.org/latest.md?page=1276

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

**Page:** 1277

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## [How to use window width of dashboard to show/hide groups](https://discourse.nodered.org/t/how-to-use-window-width-of-dashboard-to-show-hide-groups/11419)

<div class="topic-metadata">

**Author:** [@GregorR1](https://discourse.nodered.org/u/GregorR1)\
**Replies:** 2\
**Last updated:** [23 May 2019 09:11 UTC](https://discourse.nodered.org/t/how-to-use-window-width-of-dashboard-to-show-hide-groups/11419 "2019-05-23T09:11:07Z")

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Hi, I'm trying to work out a way to use the window width of the dashboard to show and hide groups on the dashboard. I currently am using the Ui\_control node to hide and show the group and this is working fine. The thi…

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## [Interconnection with Yokogawa VNet](https://discourse.nodered.org/t/interconnection-with-yokogawa-vnet/11366)

<div class="topic-metadata">

**Author:** [@Pons](https://discourse.nodered.org/u/Pons)\
**Replies:** 3\
**Last updated:** [23 May 2019 08:27 UTC](https://discourse.nodered.org/t/interconnection-with-yokogawa-vnet/11366 "2019-05-23T08:27:53Z")

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Hi, has anyone done node red projects to interface with Yokogawa DCS via VNet?

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## [Fatal error: commiting semi space failed. Node-red stops](https://discourse.nodered.org/t/fatal-error-commiting-semi-space-failed-node-red-stops/11272)

<div class="topic-metadata">

**Author:** [@johanmeer](https://discourse.nodered.org/u/johanmeer)\
**Replies:** 3\
**Last updated:** [23 May 2019 06:53 UTC](https://discourse.nodered.org/t/fatal-error-commiting-semi-space-failed-node-red-stops/11272 "2019-05-23T06:53:43Z")

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I have an ESP8266 that sends data from the DHT22 sensor to node-red via MQTT. I have also installed the buienradar node. Node-red stopped last 2 nights. In the log I first see these lines 6x in a time of 10 minutes: 18…

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## [Adding images to your flow or node's ReadMe in the Node-RED library](https://discourse.nodered.org/t/adding-images-to-your-flow-or-nodes-readme-in-the-node-red-library/11429)

<div class="topic-metadata">

**Author:** [@zenofmud](https://discourse.nodered.org/u/zenofmud)\
**Replies:** 5\
**Last updated:** [22 May 2019 21:57 UTC](https://discourse.nodered.org/t/adding-images-to-your-flow-or-nodes-readme-in-the-node-red-library/11429 "2019-05-22T21:57:43Z")

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Have you ever added a node of flow to the Node-RED Library and said to yourself "Oh, this ReadMe would be so much better if I could just add a couple images to it!" However, git does not allow you to copy an image di…

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## [Validate input message in UI node](https://discourse.nodered.org/t/validate-input-message-in-ui-node/11393)

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**Author:** [@BartButenaers](https://discourse.nodered.org/u/BartButenaers)\
**Replies:** 7\
**Last updated:** [22 May 2019 20:56 UTC](https://discourse.nodered.org/t/validate-input-message-in-ui-node/11393 "2019-05-22T20:56:35Z")

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Hi folks, When developing a non-UI node, input messages can easily be validated (and optionally skipped): node.on("input", function(msg) { if(!Array.isArray(msg.payload)) { // Skip input message when payloa…

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## [Error while lauching Node-Red: "It looks like serialport didn't compile properly. This is a common problem and its fix is well documented here https://github.com/voodootikigod/node-serialport#to-install"](https://discourse.nodered.org/t/error-while-lauching-node-red-it-looks-like-serialport-didnt-compile-properly-this-is-a-common-problem-and-its-fix-is-well-documented-here-https-github-com-voodootikigod-node-serialport-to-install/11395)

<div class="topic-metadata">

**Author:** [@Jasurf](https://discourse.nodered.org/u/Jasurf)\
**Replies:** 7\
**Last updated:** [22 May 2019 20:07 UTC](https://discourse.nodered.org/t/error-while-lauching-node-red-it-looks-like-serialport-didnt-compile-properly-this-is-a-common-problem-and-its-fix-is-well-documented-here-https-github-com-voodootikigod-node-serialport-to-install/11395 "2019-05-22T20:07:36Z")

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Hi Guys, While I was updating "Node-Red Dashboard" to the latest version, Node-Red crashed on me and when I tried to re-launch it, I started getting this error: "It looks like serialport didn't compile properly. This i…

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## [Uibuilder v2 update: v2.0.0-dev2](https://discourse.nodered.org/t/uibuilder-v2-update-v2-0-0-dev2/11299)

<div class="topic-metadata">

**Author:** [@TotallyInformation](https://discourse.nodered.org/u/TotallyInformation)\
**Replies:** 12\
**Last updated:** [22 May 2019 20:01 UTC](https://discourse.nodered.org/t/uibuilder-v2-update-v2-0-0-dev2/11299 "2019-05-22T20:01:54Z")

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Hi all, Not sure how many people are following the development of the v2 branch of uibuilder? This is a massive update and is taking much longer than I'd hoped. However, I think you will find the wait well worth while. …

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## [RED.httpNode.get gives "Unauthorized"](https://discourse.nodered.org/t/red-httpnode-get-gives-unauthorized/8749)

<div class="topic-metadata">

**Author:** [@BartButenaers](https://discourse.nodered.org/u/BartButenaers)\
**Replies:** 7\
**Last updated:** [22 May 2019 19:40 UTC](https://discourse.nodered.org/t/red-httpnode-get-gives-unauthorized/8749 "2019-05-22T19:40:24Z")

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Hi folks, I have released last week the node-red-contrib-ui-heatmap node, which worked fine at the moment... However I got a Github issue from somebody that cannot see the heatmap in his dashboard. So I have installed…

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## [Cant resize graphs - limited to auto or max 6 wide?](https://discourse.nodered.org/t/cant-resize-graphs-limited-to-auto-or-max-6-wide/11082)

<div class="topic-metadata">

**Author:** [@nodecentral](https://discourse.nodered.org/u/nodecentral)\
**Replies:** 9\
**Last updated:** [22 May 2019 19:19 UTC](https://discourse.nodered.org/t/cant-resize-graphs-limited-to-auto-or-max-6-wide/11082 "2019-05-22T19:19:08Z")

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Hi I’ve started to capture frequent energy readings and I’m trying to graph them, over an hour, day, week etc, but I can’t seem to make the graphs appear wider ? If I go in to the settings, and try to change it away fro…

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## [TIme remaining on Trigger node - debug or msg.property](https://discourse.nodered.org/t/time-remaining-on-trigger-node-debug-or-msg-property/343)

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**Author:** [@craigcurtin](https://discourse.nodered.org/u/craigcurtin)\
**Replies:** 16\
**Last updated:** [22 May 2019 18:58 UTC](https://discourse.nodered.org/t/time-remaining-on-trigger-node-debug-or-msg-property/343 "2019-05-22T18:58:27Z")

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Guys, Suggestion to add a debug for time remaining on a trigger node to allow that to be output to the debug window or as a property So i have a trigger node that counts down for 4 hours - i have no idea when it was set…

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## [How to check network switch or computers alive with PING](https://discourse.nodered.org/t/how-to-check-network-switch-or-computers-alive-with-ping/11405)

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**Author:** [@muharremsari](https://discourse.nodered.org/u/muharremsari)\
**Replies:** 6\
**Last updated:** [22 May 2019 18:52 UTC](https://discourse.nodered.org/t/how-to-check-network-switch-or-computers-alive-with-ping/11405 "2019-05-22T18:52:58Z")

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I would get alive signal with PING from net device. I was use ping-notification and saw response time on debug monitor. How i convert response time to BOOLEAN value FALSE or TRUE for "Communication Is Ok" \[{"id":"b86d0…

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## [Don't open launch node-red](https://discourse.nodered.org/t/dont-open-launch-node-red/11431)

<div class="topic-metadata">

**Author:** [@Tentelete](https://discourse.nodered.org/u/Tentelete)\
**Replies:** 1\
**Last updated:** [22 May 2019 17:42 UTC](https://discourse.nodered.org/t/dont-open-launch-node-red/11431 "2019-05-22T17:42:21Z")

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I am new to node-red and using the telegram packet but when I start node-red I have the following error: Starting as a systemd service. 22 May 17:19:14 - \[info\] \[mqtt-broker:MQTT Raspi 57\] Connected to broker: mqtt://19…

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## [Trouble writing to an InfluxDB](https://discourse.nodered.org/t/trouble-writing-to-an-influxdb/11357)

<div class="topic-metadata">

**Author:** [@Darryn](https://discourse.nodered.org/u/Darryn)\
**Replies:** 10\
**Last updated:** [22 May 2019 16:22 UTC](https://discourse.nodered.org/t/trouble-writing-to-an-influxdb/11357 "2019-05-22T16:22:48Z")

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Hi all Im fairly new to the likes of programming and tinkering with raspberryPi. My first project that I am trying to implement is a counter which uses 4 inductive sensors to count from four separate machines. To begin …

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## [Use reply headers for email threading](https://discourse.nodered.org/t/use-reply-headers-for-email-threading/11364)

<div class="topic-metadata">

**Author:** [@domenzain](https://discourse.nodered.org/u/domenzain)\
**Replies:** 7\
**Last updated:** [22 May 2019 15:37 UTC](https://discourse.nodered.org/t/use-reply-headers-for-email-threading/11364 "2019-05-22T15:37:34Z")

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Currently it is possible to have e-mails as inputs or outputs of flows. Some headers can be set directly, like To and CC, but not all: specifically, In-Reply-To and References should be updated for email threading to wo…

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## [Mysql database in dropdown node](https://discourse.nodered.org/t/mysql-database-in-dropdown-node/11144)

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**Author:** [@niels\_devos](https://discourse.nodered.org/u/niels_devos)\
**Replies:** 31\
**Last updated:** [22 May 2019 12:14 UTC](https://discourse.nodered.org/t/mysql-database-in-dropdown-node/11144 "2019-05-22T12:14:01Z")

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Hello, I am working on a project and I need to show some values from a mysql database in a dropdown node. It doesn't work, can anyone help me? \[{"id":"b4621290.54dd1","type":"mysql","z":"e6d7a892.242908","mydb":"b004cf…

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## [NodeRed health detection](https://discourse.nodered.org/t/nodered-health-detection/9691)

<div class="topic-metadata">

**Author:** [@jacyuan](https://discourse.nodered.org/u/jacyuan)\
**Replies:** 5\
**Last updated:** [22 May 2019 11:46 UTC](https://discourse.nodered.org/t/nodered-health-detection/9691 "2019-05-22T11:46:55Z")

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Hello, While using tools like kubernetes to deploy NodeRed instances, we need to provide probe endpoints for health check. While having NodeRed editor enabled, we can check its health with a simple http get on / endpoi…

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## [FR: Open last tab button and recent tabs list](https://discourse.nodered.org/t/fr-open-last-tab-button-and-recent-tabs-list/11414)

<div class="topic-metadata">

**Author:** [@moebius](https://discourse.nodered.org/u/moebius)\
**Replies:** 0\
**Last updated:** [22 May 2019 11:07 UTC](https://discourse.nodered.org/t/fr-open-last-tab-button-and-recent-tabs-list/11414 "2019-05-22T11:07:56Z")

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A button to change to the last active tab would be useful. It could be implemented like the "+" button for tabs. As optional feature, a long press on the button should show a list of the x recent tabs used.

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## [Task scheduler seems to hinder adminAuth](https://discourse.nodered.org/t/task-scheduler-seems-to-hinder-adminauth/11406)

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**Author:** [@Louise](https://discourse.nodered.org/u/Louise)\
**Replies:** 2\
**Last updated:** [22 May 2019 10:16 UTC](https://discourse.nodered.org/t/task-scheduler-seems-to-hinder-adminauth/11406 "2019-05-22T10:16:30Z")

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Hello, I use adminAuth in my settings file to secure node-red with username and password and this works perfectly fine, until I use task scheduler to autoboot node-red. When I do this I do not have to login anymore to g…

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## [Use file node to read text file](https://discourse.nodered.org/t/use-file-node-to-read-text-file/11304)

<div class="topic-metadata">

**Author:** [@Kwonsoyeong](https://discourse.nodered.org/u/Kwonsoyeong)\
**Replies:** 3\
**Last updated:** [22 May 2019 07:42 UTC](https://discourse.nodered.org/t/use-file-node-to-read-text-file/11304 "2019-05-22T07:42:12Z")

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I use timestamp and this node to read text file . I want to no use timestamp to read text file. What I to do?

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## [Creating default config node](https://discourse.nodered.org/t/creating-default-config-node/11401)

<div class="topic-metadata">

**Author:** [@uma](https://discourse.nodered.org/u/uma)\
**Replies:** 0\
**Last updated:** [22 May 2019 04:48 UTC](https://discourse.nodered.org/t/creating-default-config-node/11401 "2019-05-22T04:48:22Z")

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This is a related question to another one I had asked earlier but I believe it deserves its own topic. I am creating a custom node which has its own config node (following https://nodered.org/docs/creating-nodes/config-n…

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## [Constraining the number of config nodes](https://discourse.nodered.org/t/constraining-the-number-of-config-nodes/11398)

<div class="topic-metadata">

**Author:** [@uma](https://discourse.nodered.org/u/uma)\
**Replies:** 0\
**Last updated:** [22 May 2019 03:08 UTC](https://discourse.nodered.org/t/constraining-the-number-of-config-nodes/11398 "2019-05-22T03:08:44Z")

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Hi I am creating config server nodes for my custom node- I am following https://nodered.org/docs/creating-nodes/config-nodes. Is there a way to constrain the number of config nodes created? As an example, I would like t…

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## [How to start Node-Red with closed palette category](https://discourse.nodered.org/t/how-to-start-node-red-with-closed-palette-category/11343)

<div class="topic-metadata">

**Author:** [@kmaepu](https://discourse.nodered.org/u/kmaepu)\
**Replies:** 2\
**Last updated:** [22 May 2019 01:43 UTC](https://discourse.nodered.org/t/how-to-start-node-red-with-closed-palette-category/11343 "2019-05-22T01:43:03Z")

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When you start Node-Red and access it from a browser, you will see the palette category expanded. Is there a way to start with the palette category closed?

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## ['Web of Things' support for node-red-nodegen](https://discourse.nodered.org/t/web-of-things-support-for-node-red-nodegen/6545)

<div class="topic-metadata">

**Author:** [@ktoumura](https://discourse.nodered.org/u/ktoumura)\
**Replies:** 11\
**Last updated:** [22 May 2019 00:07 UTC](https://discourse.nodered.org/t/web-of-things-support-for-node-red-nodegen/6545 "2019-05-22T00:07:38Z")

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‘Web of Things (WoT)’ is a W3C standard under development, to integrate across IoT protocols/platforms. One of central building blocks of WoT is a ’Thing Description’, which describes the metadata and interface of IoT d…

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## [Installing tensorflow](https://discourse.nodered.org/t/installing-tensorflow/11394)

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**Author:** [@khalil](https://discourse.nodered.org/u/khalil)\
**Replies:** 1\
**Last updated:** [21 May 2019 22:35 UTC](https://discourse.nodered.org/t/installing-tensorflow/11394 "2019-05-21T22:35:48Z")

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Hi everyone I am trying to install tensorflow on my raspbery pi3. I used the command "pip install tensorflow" after a long time i got a bunch of warning like those can anybody tell me how to fix it ?

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## [Join Device Modbus Device](https://discourse.nodered.org/t/join-device-modbus-device/11372)

<div class="topic-metadata">

**Author:** [@afiqkimii](https://discourse.nodered.org/u/afiqkimii)\
**Replies:** 1\
**Last updated:** [21 May 2019 21:45 UTC](https://discourse.nodered.org/t/join-device-modbus-device/11372 "2019-05-21T21:45:38Z")

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When registering a device, we need to fill 1.register name 2.register address 3.R/W method The R/W method has read function 01,02,03,04 write function 05,06,15,16. Can i know the details of the list of those R/W method…

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## [Influx stopped writing data](https://discourse.nodered.org/t/influx-stopped-writing-data/11324)

<div class="topic-metadata">

**Author:** [@Colin](https://discourse.nodered.org/u/Colin)\
**Replies:** 25\
**Last updated:** [21 May 2019 20:45 UTC](https://discourse.nodered.org/t/influx-stopped-writing-data/11324 "2019-05-21T20:45:23Z")

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Before going to the influx forum I thought I would try here in case anyone has seen a similar problem. After working perfectly for months influx suddenly stopped writing data at exactly midnight UTC this morning. I was…

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## [Cant find process.env settings](https://discourse.nodered.org/t/cant-find-process-env-settings/1800)

<div class="topic-metadata">

**Author:** [@georgeena\_thomas](https://discourse.nodered.org/u/georgeena_thomas)\
**Replies:** 3\
**Last updated:** [21 May 2019 19:24 UTC](https://discourse.nodered.org/t/cant-find-process-env-settings/1800 "2019-05-21T19:24:24Z")

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I have a node-red flow that pulls in env variables from a process.env node but I can't seem to find where exactly it is setting those values in my project.

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## [What am I missing?](https://discourse.nodered.org/t/what-am-i-missing/11380)

<div class="topic-metadata">

**Author:** [@maxxam](https://discourse.nodered.org/u/maxxam)\
**Replies:** 21\
**Last updated:** [21 May 2019 19:09 UTC](https://discourse.nodered.org/t/what-am-i-missing/11380 "2019-05-21T19:09:06Z")

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Hi, I've just installed node-red and want to test it... I've just followed the simplest example in documentation, but it wont run. my node-red flow Where am I wrong?

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## [Change node: dynamically set a property](https://discourse.nodered.org/t/change-node-dynamically-set-a-property/11374)

<div class="topic-metadata">

**Author:** [@Andydesjardins](https://discourse.nodered.org/u/Andydesjardins)\
**Replies:** 12\
**Last updated:** [21 May 2019 19:04 UTC](https://discourse.nodered.org/t/change-node-dynamically-set-a-property/11374 "2019-05-21T19:04:43Z")

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Hello, Is there a way to dynamically set a property in a change node? Something like: set flow.mode\[msg.targetMode\].enabled to msg.payload I know I can do it in javascript, but it would be better with a change node. …

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## [Dynamically assign UI to a group/tab](https://discourse.nodered.org/t/dynamically-assign-ui-to-a-group-tab/11373)

<div class="topic-metadata">

**Author:** [@Andydesjardins](https://discourse.nodered.org/u/Andydesjardins)\
**Replies:** 3\
**Last updated:** [21 May 2019 18:28 UTC](https://discourse.nodered.org/t/dynamically-assign-ui-to-a-group-tab/11373 "2019-05-21T18:28:45Z")

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Hello, Is there a way to dynamically assign UI node to a group/tab? I have a tab with lot of stuff in it. I want to create a new tab that is very similar, but I want to avoid to duplicate everything. Thanks

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