# Ignition **URL:** https://forum.inductiveautomation.com/c/ignition/6.md?no_subcategories=false&page=39 [Latest](https://forum.inductiveautomation.com/latest.md) · [Categories](https://forum.inductiveautomation.com/categories.md) · [Tags](https://forum.inductiveautomation.com/tags.md) **Page:** 40 --- ## [All OPC Tags Disconnecting](https://forum.inductiveautomation.com/t/all-opc-tags-disconnecting/115600)
**Author:** [@robert.schwan](https://forum.inductiveautomation.com/u/robert.schwan)\ **Replies:** 1\ **Last updated:** [May 19, 2026, 2:20pm UTC](https://forum.inductiveautomation.com/t/all-opc-tags-disconnecting/115600 "2026-05-19T14:20:51Z")
I've been trying to move a SQLite database into a MS SQL database for one project. Somehow now, all my tags on all my projects are disconnecting and reading "unknown last value". I've checked lots of places in my gateway… --- ## [Session.custom property AttributeError: 'com.inductiveautomation.perspective.gateway.script' object has no attribute](https://forum.inductiveautomation.com/t/session-custom-property-attributeerror-com-inductiveautomation-perspective-gateway-script-object-has-no-attribute/115597)
**Author:** [@danielps1818](https://forum.inductiveautomation.com/u/danielps1818)\ **Replies:** 3\ **Last updated:** [May 19, 2026, 1:06pm UTC](https://forum.inductiveautomation.com/t/session-custom-property-attributeerror-com-inductiveautomation-perspective-gateway-script-object-has-no-attribute/115597 "2026-05-19T13:06:51Z")
I have this code in a view on the onStartUp action. data = self.session.custom.rooms\_data if not data: self.session.custom.rooms\_data = ( perspective.get\_rooms() ) For some reason I get this error: Error running a… --- ## [Create and populate nested UDT instance](https://forum.inductiveautomation.com/t/create-and-populate-nested-udt-instance/115572)
**Author:** [@daniel.soderborg](https://forum.inductiveautomation.com/u/daniel.soderborg)\ **Replies:** 8\ **Last updated:** [May 19, 2026, 12:40pm UTC](https://forum.inductiveautomation.com/t/create-and-populate-nested-udt-instance/115572 "2026-05-19T12:40:35Z")
I'm trying to automatically create new UDT instances based on a SQL query from a database with the active orders for the production line. I have succeeded with the creation of the instances with the correct names but I … --- ## [Modbus RTU request with a custom write command](https://forum.inductiveautomation.com/t/modbus-rtu-request-with-a-custom-write-command/115591)
**Author:** [@amurillo](https://forum.inductiveautomation.com/u/amurillo)\ **Replies:** 1\ **Last updated:** [May 19, 2026, 12:02pm UTC](https://forum.inductiveautomation.com/t/modbus-rtu-request-with-a-custom-write-command/115591 "2026-05-19T12:02:36Z")
Hello, I am working with an inverter that only writes with a personalized command, soo I can't use system.opc.writeValues(). I'm trying to close the modbus device I have in the gateway and open the port with system.seria… --- ## [Very useful Gateway Communication Disabled](https://forum.inductiveautomation.com/t/very-useful-gateway-communication-disabled/115595)
**Author:** [@Alejandro\_Alaco](https://forum.inductiveautomation.com/u/Alejandro_Alaco)\ **Replies:** 0\ **Last updated:** [May 19, 2026, 11:50am UTC](https://forum.inductiveautomation.com/t/very-useful-gateway-communication-disabled/115595 "2026-05-19T11:50:35Z")
Hello, I just found out Very useful to don´t overload gateway conexión and in my case work much faster. --- ## [Trouble getting all data from native History funtion](https://forum.inductiveautomation.com/t/trouble-getting-all-data-from-native-history-funtion/115581)
**Author:** [@laurine.wiplie](https://forum.inductiveautomation.com/u/laurine.wiplie)\ **Replies:** 8\ **Last updated:** [May 19, 2026, 11:42am UTC](https://forum.inductiveautomation.com/t/trouble-getting-all-data-from-native-history-funtion/115581 "2026-05-19T11:42:25Z")
Hello, I'm having a problem with the tag history and audit features. What I'm trying to do is to create a view with a simple table and custom filter that will allow the users to visualize every change on the applicatio… --- ## [Expression Language Misunderstanding: indexOf()](https://forum.inductiveautomation.com/t/expression-language-misunderstanding-indexof/115551)
**Author:** [@Wesley\_Waters1](https://forum.inductiveautomation.com/u/Wesley_Waters1)\ **Replies:** 14\ **Last updated:** [May 18, 2026, 9:47pm UTC](https://forum.inductiveautomation.com/t/expression-language-misunderstanding-indexof/115551 "2026-05-18T21:47:48Z")
I have the following Expression Structure: { "Valves":\[ 0:Open 1:Closed 2:Closed ... \] I want to return true if any of the valves are open When I do the following: {value}\["Valves"\]\[0\] = "Open" Result: true When I … --- ## [Navigate to a page does not trigger page startup script](https://forum.inductiveautomation.com/t/navigate-to-a-page-does-not-trigger-page-startup-script/115588)
**Author:** [@Eugene49](https://forum.inductiveautomation.com/u/Eugene49)\ **Replies:** 7\ **Last updated:** [May 18, 2026, 9:44pm UTC](https://forum.inductiveautomation.com/t/navigate-to-a-page-does-not-trigger-page-startup-script/115588 "2026-05-18T21:44:00Z")
Please remind me, is this really the case? using system.perspective.navigate(), it does not trigger page startup script?? --- ## [Report doesn't update color from binding in Design mode](https://forum.inductiveautomation.com/t/report-doesnt-update-color-from-binding-in-design-mode/115578)
**Author:** [@Transistor](https://forum.inductiveautomation.com/u/Transistor)\ **Replies:** 3\ **Last updated:** [May 18, 2026, 9:34pm UTC](https://forum.inductiveautomation.com/t/report-doesnt-update-color-from-binding-in-design-mode/115578 "2026-05-18T21:34:29Z")
I'm trying to control some style elements in a lengthy report by defining colors in the Data | Parameters variables. For example, colorHeadingBG = color(255, 200, 70) (orange). Figure 1. The parameter configuration. … --- ## [Feedback on 8.3 configuration page](https://forum.inductiveautomation.com/t/feedback-on-8-3-configuration-page/115577)
**Author:** [@Steve\_Laubach](https://forum.inductiveautomation.com/u/Steve_Laubach)\ **Replies:** 1\ **Last updated:** [May 18, 2026, 7:58pm UTC](https://forum.inductiveautomation.com/t/feedback-on-8-3-configuration-page/115577 "2026-05-18T19:58:25Z")
I generally like what you guys did. I just wanted to point out that it would be good to have a "you're not logged in" landing page. It says "page not found" which might freak people out. --- ## [Clock drift and Garbage Collection](https://forum.inductiveautomation.com/t/clock-drift-and-garbage-collection/115322)
**Author:** [@Flying55](https://forum.inductiveautomation.com/u/Flying55)\ **Replies:** 36\ **Last updated:** [May 18, 2026, 6:15pm UTC](https://forum.inductiveautomation.com/t/clock-drift-and-garbage-collection/115322 "2026-05-18T18:15:09Z")
We have a small system that is still under development that have issues with Clock Drift, I looked into the general guide but that didn't help much, If the gateway is restarted it works fine during the day until it for… --- ## [Perspective PowerChart Pens Loading Slow and Cutting Out](https://forum.inductiveautomation.com/t/perspective-powerchart-pens-loading-slow-and-cutting-out/115586)
**Author:** [@robert.schwan](https://forum.inductiveautomation.com/u/robert.schwan)\ **Replies:** 1\ **Last updated:** [May 18, 2026, 5:02pm UTC](https://forum.inductiveautomation.com/t/perspective-powerchart-pens-loading-slow-and-cutting-out/115586 "2026-05-18T17:02:10Z")
I'm running into an issue where I have a chart with two historical tags. I'm grabbing 2 weeks worth of data which is only 14 points of data (I have a script writing data to these tags twice a day). The powerchart is slow… --- ## [JSON Patch in Ignition](https://forum.inductiveautomation.com/t/json-patch-in-ignition/115580)
**Author:** [@hkewalramani](https://forum.inductiveautomation.com/u/hkewalramani)\ **Replies:** 1\ **Last updated:** [May 18, 2026, 4:38pm UTC](https://forum.inductiveautomation.com/t/json-patch-in-ignition/115580 "2026-05-18T16:38:37Z")
I’m looking at adding JSON Patch support into Ignition using existing Java libraries instead of writing patch logic manually. From what I can tell, libraries like: com.github.fge:json-patch java-json-tools:json-pa… --- ## [Reset trial button disappeared](https://forum.inductiveautomation.com/t/reset-trial-button-disappeared/115583)
**Author:** [@adrien.combe](https://forum.inductiveautomation.com/u/adrien.combe)\ **Replies:** 1\ **Last updated:** [May 18, 2026, 2:56pm UTC](https://forum.inductiveautomation.com/t/reset-trial-button-disappeared/115583 "2026-05-18T14:56:26Z")
I have this issue with the reset trial button that is missing. I tried to solve the problem in multiple ways (restarted my PC, cleaned my Google Chrome for example) but none worked. I am logging in my gateway with my a… --- ## [Loading Dashboard Data - Minimising DB traffic](https://forum.inductiveautomation.com/t/loading-dashboard-data-minimising-db-traffic/115569)
**Author:** [@stephen](https://forum.inductiveautomation.com/u/stephen)\ **Replies:** 1\ **Last updated:** [May 18, 2026, 11:49am UTC](https://forum.inductiveautomation.com/t/loading-dashboard-data-minimising-db-traffic/115569 "2026-05-18T11:49:39Z")
Hi All When loading data from a DB, am I better off to set a custom property to hold the data and refrence that or create multiple named quiries and bind them to the objects themselves. e.g. If i am loading 24 hours of … --- ## [Perspective Table Dynamic Row Highlight Based on Dataset Tag Value Match](https://forum.inductiveautomation.com/t/perspective-table-dynamic-row-highlight-based-on-dataset-tag-value-match/115562)
**Author:** [@tejas200010](https://forum.inductiveautomation.com/u/tejas200010)\ **Replies:** 6\ **Last updated:** [May 18, 2026, 11:48am UTC](https://forum.inductiveautomation.com/t/perspective-table-dynamic-row-highlight-based-on-dataset-tag-value-match/115562 "2026-05-18T11:48:00Z")
Hi All, I am working on an Ignition Perspective Table component. My table data is coming from a Dataset Tag: \[default\]IGBT\_ROBOT\_CELL\_PROD/SAP\_RES\_Dataset The table contains a column: "Prod. Order No" I also have a… --- ## [Derived themes (dark-cool, etc) not working in v8.3 and MACOS](https://forum.inductiveautomation.com/t/derived-themes-dark-cool-etc-not-working-in-v8-3-and-macos/115544)
**Author:** [@Gabriel\_Martins](https://forum.inductiveautomation.com/u/Gabriel_Martins)\ **Replies:** 7\ **Last updated:** [May 18, 2026, 10:26am UTC](https://forum.inductiveautomation.com/t/derived-themes-dark-cool-etc-not-working-in-v8-3-and-macos/115544 "2026-05-18T10:26:52Z")
Has anyone else had issues getting derived themes such as dark-cool to work on ignition8.3 and macOS? I suspect it is to do with the themes folder not being in the expected path. The documentation mentions folder: %I… --- ## [S7-300 PLC tags frozen or not updating](https://forum.inductiveautomation.com/t/s7-300-plc-tags-frozen-or-not-updating/115571)
**Author:** [@Sebastian\_coor](https://forum.inductiveautomation.com/u/Sebastian_coor)\ **Replies:** 0\ **Last updated:** [May 18, 2026, 9:35am UTC](https://forum.inductiveautomation.com/t/s7-300-plc-tags-frozen-or-not-updating/115571 "2026-05-18T09:35:09Z")
Hi! I am having a werid issue with ignition 8.1 legacy S7 driver. in some cases the value in ignition stops changing or updating. Quality still good and connection good but timeStamp of the tags can be several days, If … --- ## [Problem with historical tags and historical tables](https://forum.inductiveautomation.com/t/problem-with-historical-tags-and-historical-tables/115006)
**Author:** [@Sebastian\_coor](https://forum.inductiveautomation.com/u/Sebastian_coor)\ **Replies:** 2\ **Last updated:** [May 18, 2026, 9:28am UTC](https://forum.inductiveautomation.com/t/problem-with-historical-tags-and-historical-tables/115006 "2026-05-18T09:28:09Z")
Hi! We have a Ignition 8.1 redundancy system running and all the tags got 2 new entrance on sqlt\_te and is causing problem on the chart or easychart as is fetching info from the latest id, today at 11:30 was created th… --- ## [\[IGN-15587\]Historian Query Aggregated Points for Multiple Tags and Aggregates](https://forum.inductiveautomation.com/t/ign-15587-historian-query-aggregated-points-for-multiple-tags-and-aggregates/114209)
**Author:** [@Liam\_Dietrich](https://forum.inductiveautomation.com/u/Liam_Dietrich)\ **Replies:** 4\ **Last updated:** [May 18, 2026, 9:22am UTC](https://forum.inductiveautomation.com/t/ign-15587-historian-query-aggregated-points-for-multiple-tags-and-aggregates/114209 "2026-05-18T09:22:28Z")
Ignition Version: 8.3.3 I am attempting to use system.historian.queryAggregatedPoints for multiple tag paths and return multiple aggregates for each tag. Below is how I would expect the proper syntax to be formatted, b… --- ## [Tag binding is not firing automatically](https://forum.inductiveautomation.com/t/tag-binding-is-not-firing-automatically/115558)
**Author:** [@prasoon](https://forum.inductiveautomation.com/u/prasoon)\ **Replies:** 4\ **Last updated:** [May 18, 2026, 7:15am UTC](https://forum.inductiveautomation.com/t/tag-binding-is-not-firing-automatically/115558 "2026-05-18T07:15:38Z")
I have made a timer script to simulate tags that are similar to MQTT engine, such that it will update the timestamp in 10 sec now in view I have made a message with label that after 30 sec if timestamp is not updating th… --- ## ["No Trend Data Source available" on a secondary/cloud gateway — pens are configured in props](https://forum.inductiveautomation.com/t/no-trend-data-source-available-on-a-secondary-cloud-gateway-pens-are-configured-in-props/115566)
**Author:** [@kunal.purohit](https://forum.inductiveautomation.com/u/kunal.purohit)\ **Replies:** 0\ **Last updated:** [May 18, 2026, 5:22am UTC](https://forum.inductiveautomation.com/t/no-trend-data-source-available-on-a-secondary-cloud-gateway-pens-are-configured-in-props/115566 "2026-05-18T05:22:16Z")
Perspective Power Chart shows "No Trend Data Source available" on a secondary/cloud gateway — pens are configured in props.pens with valid historian source paths, historian is RUNNING, tag history queries return data cor… --- ## [Memory Tags and Custom Session Props](https://forum.inductiveautomation.com/t/memory-tags-and-custom-session-props/115554)
**Author:** [@AUSDIV](https://forum.inductiveautomation.com/u/AUSDIV)\ **Replies:** 5\ **Last updated:** [May 16, 2026, 12:41pm UTC](https://forum.inductiveautomation.com/t/memory-tags-and-custom-session-props/115554 "2026-05-16T12:41:48Z")
I haven't made much use of Memory Tags, but I am curious about when they may be better or worse than Custom Session props. I recently have had to use them, or probably didn't have to, but chose to, and it has me wonderin… --- ## [Take existing props.style and turn it into a Style Class](https://forum.inductiveautomation.com/t/take-existing-props-style-and-turn-it-into-a-style-class/115529)
**Author:** [@crumberger](https://forum.inductiveautomation.com/u/crumberger)\ **Replies:** 2\ **Last updated:** [May 16, 2026, 9:45am UTC](https://forum.inductiveautomation.com/t/take-existing-props-style-and-turn-it-into-a-style-class/115529 "2026-05-16T09:45:41Z")
Is there a simple way to take what you have in the props.style and apply it to a new style class without having to manually enter every field over again? You don't exactly see what the style class looks like while you'r… --- ## [How to have identical projects in the same gateway](https://forum.inductiveautomation.com/t/how-to-have-identical-projects-in-the-same-gateway/115518)
**Author:** [@oscar.delarosa](https://forum.inductiveautomation.com/u/oscar.delarosa)\ **Replies:** 6\ **Last updated:** [May 15, 2026, 7:13pm UTC](https://forum.inductiveautomation.com/t/how-to-have-identical-projects-in-the-same-gateway/115518 "2026-05-15T19:13:06Z")
I have 2 lines that are the same in terms of names and processes i want to be able to host both of them in the same gateway, I know for tags I can have a folder for line1 and one for line2 but is there a way to do the sa… --- ## [Ignition does not reflect git changes until I manually call \`system.project.requestScan()\`](https://forum.inductiveautomation.com/t/ignition-does-not-reflect-git-changes-until-i-manually-call-system-project-requestscan/111528)
**Author:** [@bghunt](https://forum.inductiveautomation.com/u/bghunt)\ **Replies:** 4\ **Last updated:** [May 15, 2026, 3:45pm UTC](https://forum.inductiveautomation.com/t/ignition-does-not-reflect-git-changes-until-i-manually-call-system-project-requestscan/111528 "2026-05-15T15:45:03Z")
I have a 2 system setup for ignition: 1 dev station and 1 production server. I do all my development on my dev station and once everything is good to go I commit to git and then pull those changes on my production serv… --- ## [Historical Tags Not Showing in Tag Browser](https://forum.inductiveautomation.com/t/historical-tags-not-showing-in-tag-browser/115549)
**Author:** [@Larry\_Hardesty](https://forum.inductiveautomation.com/u/Larry_Hardesty)\ **Replies:** 7\ **Last updated:** [May 15, 2026, 2:58pm UTC](https://forum.inductiveautomation.com/t/historical-tags-not-showing-in-tag-browser/115549 "2026-05-15T14:58:49Z")
We are running an Edge Gateway, and i have created several tags to show history. When I go to set a binding on the tag, they are not showing up in the Historical Providers folder. I have stopped and started the Historian… --- ## [Tag Read on remote tag provider behaviour](https://forum.inductiveautomation.com/t/tag-read-on-remote-tag-provider-behaviour/115545)
**Author:** [@Rhys\_m](https://forum.inductiveautomation.com/u/Rhys_m)\ **Replies:** 5\ **Last updated:** [May 15, 2026, 2:38pm UTC](https://forum.inductiveautomation.com/t/tag-read-on-remote-tag-provider-behaviour/115545 "2026-05-15T14:38:51Z")
Hi, We have a set up of a couple of cloud hosted gateways, and then some local ones doing the PLC comms and contextualisation. Our central gateways run a few timer scripts to read the values of some tags to then trigger… --- ## [Ignition server sometime give Error](https://forum.inductiveautomation.com/t/ignition-server-sometime-give-error/115448)
**Author:** [@kirangodhade](https://forum.inductiveautomation.com/u/kirangodhade)\ **Replies:** 4\ **Last updated:** [May 15, 2026, 2:07pm UTC](https://forum.inductiveautomation.com/t/ignition-server-sometime-give-error/115448 "2026-05-15T14:07:12Z")
When I start to access the server, It give fallowing error -Also check the attached screenshot Exception: Project 'null' could not be found. Ignition v8.3.2 (b2025120210) Java: Azul Systems, Inc. 17.0.16 --- ## [\[IGN-14604\]V8.3.1 Vision Client Launcher Desktop Shortcut Icons Using Default Not Project's](https://forum.inductiveautomation.com/t/ign-14604-v8-3-1-vision-client-launcher-desktop-shortcut-icons-using-default-not-projects/111823)
**Author:** [@cmaynes](https://forum.inductiveautomation.com/u/cmaynes)\ **Replies:** 4\ **Last updated:** [May 15, 2026, 1:20pm UTC](https://forum.inductiveautomation.com/t/ign-14604-v8-3-1-vision-client-launcher-desktop-shortcut-icons-using-default-not-projects/111823 "2026-05-15T13:20:50Z")
Current Version: 8.3.1 Vision Module OS: Tested on both Windows 10 + 11 I am migrating from v8.1.48 where the "Create Desktop Icon" function in the Vision Client Launcher worked to create a shortcut on the desktop us… [Previous page](https://forum.inductiveautomation.com/c/ignition/6.md?no_subcategories=false&page=38) [Next page](https://forum.inductiveautomation.com/c/ignition/6.md?no_subcategories=false&page=40)