# Ignition **URL:** https://forum.inductiveautomation.com/c/ignition/6.md?no_subcategories=false&page=26 [Latest](https://forum.inductiveautomation.com/latest.md) · [Categories](https://forum.inductiveautomation.com/categories.md) · [Tags](https://forum.inductiveautomation.com/tags.md) **Page:** 27 --- ## [Memory Tag Value Changed Event Fires on Startup/Creation with initialChange=True and Uncertain\_InitialValue Previous Value](https://forum.inductiveautomation.com/t/memory-tag-value-changed-event-fires-on-startup-creation-with-initialchange-true-and-uncertain-initialvalue-previous-value/116248)
**Author:** [@svatsal77](https://forum.inductiveautomation.com/u/svatsal77)\ **Replies:** 1\ **Last updated:** [July 2, 2026, 1:18pm UTC](https://forum.inductiveautomation.com/t/memory-tag-value-changed-event-fires-on-startup-creation-with-initialchange-true-and-uncertain-initialvalue-previous-value/116248 "2026-07-02T13:18:28Z")
Hi everyone, I'm trying to understand some behavior I'm observing with Memory Tags and Tag Event Scripts (Value Changed) in Ignition 8.1. Test Setup I created a new Boolean Memory Tag with a Value Changed script: logg… --- ## [Import large language files](https://forum.inductiveautomation.com/t/import-large-language-files/116211)
**Author:** [@Janis\_Voss](https://forum.inductiveautomation.com/u/Janis_Voss)\ **Replies:** 5\ **Last updated:** [July 2, 2026, 7:22am UTC](https://forum.inductiveautomation.com/t/import-large-language-files/116211 "2026-07-02T07:22:46Z")
Hey, I am investigating the Translation Manager in Perspective. I am trying to find a way to synchronize projects with each other and the import functionality caught my attention. When it comes to large files (70.000+)… --- ## [Script transform calling script library function resulting in AttributeErrors](https://forum.inductiveautomation.com/t/script-transform-calling-script-library-function-resulting-in-attributeerrors/116216)
**Author:** [@Jeff\_Krol](https://forum.inductiveautomation.com/u/Jeff_Krol)\ **Replies:** 4\ **Last updated:** [July 1, 2026, 11:12pm UTC](https://forum.inductiveautomation.com/t/script-transform-calling-script-library-function-resulting-in-attributeerrors/116216 "2026-07-01T23:12:36Z")
Hello, I ran into an issue where I used a script transform on a dock that calls a function from the script library. It worked in testing, but when I put it into production, I quickly started getting binding overlays and… --- ## [Charts with many data points](https://forum.inductiveautomation.com/t/charts-with-many-data-points/116234)
**Author:** [@Mariangel\_Perez](https://forum.inductiveautomation.com/u/Mariangel_Perez)\ **Replies:** 1\ **Last updated:** [July 1, 2026, 10:27pm UTC](https://forum.inductiveautomation.com/t/charts-with-many-data-points/116234 "2026-07-01T22:27:03Z")
Good morning, I’m creating reports with many data points. Right now, I’ve been using PowerChart, but it has an aggregation mode and doesn’t offer an “AsStored” option. Anyway, I’ve been asked to create a report that incl… --- ## [Web Development Module and Redundancy](https://forum.inductiveautomation.com/t/web-development-module-and-redundancy/116238)
**Author:** [@dion.botha](https://forum.inductiveautomation.com/u/dion.botha)\ **Replies:** 1\ **Last updated:** [July 1, 2026, 9:59pm UTC](https://forum.inductiveautomation.com/t/web-development-module-and-redundancy/116238 "2026-07-01T21:59:51Z")
Hello, was wondering best practices for web dev module regarding a redundant backup server. Best way to handle if the master server is down. Currenltly, we do not handle it at all. First thought was the system calling th… --- ## [Display Tree item with multiple lines?](https://forum.inductiveautomation.com/t/display-tree-item-with-multiple-lines/79779)
**Author:** [@nminchin](https://forum.inductiveautomation.com/u/nminchin)\ **Replies:** 14\ **Last updated:** [July 1, 2026, 7:54pm UTC](https://forum.inductiveautomation.com/t/display-tree-item-with-multiple-lines/79779 "2026-07-01T19:54:12Z")
I want to be able to make a Tree's item expand to show multiple lines, as in the below. I'm using the Tree as a sort of debugger which shows errors, but without multiple lines it's a bit useless... --- ## [\[IGN-15910\]GAN serialization issue with streaming datasets](https://forum.inductiveautomation.com/t/ign-15910-gan-serialization-issue-with-streaming-datasets/114958)
**Author:** [@Rhys\_m](https://forum.inductiveautomation.com/u/Rhys_m)\ **Replies:** 5\ **Last updated:** [July 1, 2026, 7:11pm UTC](https://forum.inductiveautomation.com/t/ign-15910-gan-serialization-issue-with-streaming-datasets/114958 "2026-07-01T19:11:25Z")
We’ve just run in to similar after updating to 8.3.4. We are returning a dataset from a named query, and then writing that dataset straight to a tag. I suspect it is a similar issue to the one in this thread, but just wa… --- ## [Long Term Aggregate Data Storage](https://forum.inductiveautomation.com/t/long-term-aggregate-data-storage/116202)
**Author:** [@James\_Bremner](https://forum.inductiveautomation.com/u/James_Bremner)\ **Replies:** 2\ **Last updated:** [July 1, 2026, 6:53pm UTC](https://forum.inductiveautomation.com/t/long-term-aggregate-data-storage/116202 "2026-07-01T18:53:29Z")
Hey Folks, Curious to know what people have found to be the most straightforward way of setting up long term data storage. Essentially i'm looking to store high(ish) resolution data (1 second) on the Ignition Server fo… --- ## [HMI Software Architecture](https://forum.inductiveautomation.com/t/hmi-software-architecture/116236)
**Author:** [@eallenfernandez](https://forum.inductiveautomation.com/u/eallenfernandez)\ **Replies:** 1\ **Last updated:** [July 1, 2026, 6:30pm UTC](https://forum.inductiveautomation.com/t/hmi-software-architecture/116236 "2026-07-01T18:30:22Z")
Currently, our team is in the process of decoupling the business logic out of our HMI project (specifically the logic contained within perspective components) in an attempt to reduce complexity and improve maintainabilit… --- ## [Expression tag in Display Path for an alarm only works some of the time](https://forum.inductiveautomation.com/t/expression-tag-in-display-path-for-an-alarm-only-works-some-of-the-time/116235)
**Author:** [@jparsons1](https://forum.inductiveautomation.com/u/jparsons1)\ **Replies:** 0\ **Last updated:** [July 1, 2026, 5:42pm UTC](https://forum.inductiveautomation.com/t/expression-tag-in-display-path-for-an-alarm-only-works-some-of-the-time/116235 "2026-07-01T17:42:04Z")
I have a UDT that I am using across the plant. That UDT has an tag within it with a "Sensor Fault" alarm for when the signal goes below 4mA. This is a UDT I am using several hundred times over with all of the expressions… --- ## [Linear scale Tick-offset?](https://forum.inductiveautomation.com/t/linear-scale-tick-offset/95826)
**Author:** [@Remco\_Geervliet](https://forum.inductiveautomation.com/u/Remco_Geervliet)\ **Replies:** 1\ **Last updated:** [July 1, 2026, 5:37pm UTC](https://forum.inductiveautomation.com/t/linear-scale-tick-offset/95826 "2026-07-01T17:37:55Z")
Hi, quick question this time. Couldn't find an answer in the documentation or on the forum. If noone's asked before I'm sure it's just an oversight in my part, but I can't find it for the life of me. I have a horizontal… --- ## [readBlocking vs readValues](https://forum.inductiveautomation.com/t/readblocking-vs-readvalues/116232)
**Author:** [@bmeyers](https://forum.inductiveautomation.com/u/bmeyers)\ **Replies:** 4\ **Last updated:** [July 1, 2026, 3:32pm UTC](https://forum.inductiveautomation.com/t/readblocking-vs-readvalues/116232 "2026-07-01T15:32:18Z")
Looking for best practices advice and make sure I understand my options better. A PLC updates two specific registers and then latches a trigger bit telling Ignition data is ready to be stored in the database. I want to … --- ## [system.tag.storeTagHistory() causing duplicate sqlth\_te entries for same tag path with no structural change](https://forum.inductiveautomation.com/t/system-tag-storetaghistory-causing-duplicate-sqlth-te-entries-for-same-tag-path-with-no-structural-change/116203)
**Author:** [@Sudharsanan\_Mothilal](https://forum.inductiveautomation.com/u/Sudharsanan_Mothilal)\ **Replies:** 1\ **Last updated:** [July 1, 2026, 3:17pm UTC](https://forum.inductiveautomation.com/t/system-tag-storetaghistory-causing-duplicate-sqlth-te-entries-for-same-tag-path-with-no-structural-change/116203 "2026-07-01T15:17:42Z")
Ignition version: 8.1.43 Database: PostgreSQL Module: Tag Historian (standard SQL historian) Issue: I am storing time-series data into Ignition's tag historian using system.tag.storeTagHistory() from a Gateway Timer… --- ## [Alarm Journal Gateway Filter REGEX](https://forum.inductiveautomation.com/t/alarm-journal-gateway-filter-regex/116231)
**Author:** [@Mau89](https://forum.inductiveautomation.com/u/Mau89)\ **Replies:** 1\ **Last updated:** [July 1, 2026, 3:12pm UTC](https://forum.inductiveautomation.com/t/alarm-journal-gateway-filter-regex/116231 "2026-07-01T15:12:15Z")
Hi everyone, In alarm journal configuration it's possible define filter with regex? In particular, I would store all alarm except some path that contain specific word. Thanks --- ## [Ignition 8.1 core certification test example](https://forum.inductiveautomation.com/t/ignition-8-1-core-certification-test-example/116225)
**Author:** [@elino.scarizzi](https://forum.inductiveautomation.com/u/elino.scarizzi)\ **Replies:** 2\ **Last updated:** [July 1, 2026, 1:06pm UTC](https://forum.inductiveautomation.com/t/ignition-8-1-core-certification-test-example/116225 "2026-07-01T13:06:18Z")
Hello there i would like to ask if there were other many test about the core certification to practice with them. I've done the only one i've found on the Practice Test Questions | Inductive Automation Training, i would… --- ## [XY Chart x-axis label clipping](https://forum.inductiveautomation.com/t/xy-chart-x-axis-label-clipping/116206)
**Author:** [@liam1](https://forum.inductiveautomation.com/u/liam1)\ **Replies:** 2\ **Last updated:** [July 1, 2026, 7:41am UTC](https://forum.inductiveautomation.com/t/xy-chart-x-axis-label-clipping/116206 "2026-07-01T07:41:34Z")
Hi all I have an XY chart set up and want to display the X-axis labels. However, I noticed that the last X-axis value is being clipped by the component’s frame. Setting overflow to visible does not resolve the issue, a… --- ## [Subject: Assistance Needed for Tags Uncertain Errors in Ignition](https://forum.inductiveautomation.com/t/subject-assistance-needed-for-tags-uncertain-errors-in-ignition/94926)
**Author:** [@Ramesh\_Shankar](https://forum.inductiveautomation.com/u/Ramesh_Shankar)\ **Replies:** 4\ **Last updated:** [July 1, 2026, 4:48am UTC](https://forum.inductiveautomation.com/t/subject-assistance-needed-for-tags-uncertain-errors-in-ignition/94926 "2026-07-01T04:48:12Z")
Hi Team, We are experiencing issues with Tags Uncertain errors. Initially, the machine tag was connected to Kepware, and then we connected the Kepware OPC server to our Ignition system. When the issue occurred, we chec… --- ## [Uncertain\_InitialValue for large tag provider](https://forum.inductiveautomation.com/t/uncertain-initialvalue-for-large-tag-provider/73480)
**Author:** [@SamDonche](https://forum.inductiveautomation.com/u/SamDonche)\ **Replies:** 20\ **Last updated:** [July 1, 2026, 4:41am UTC](https://forum.inductiveautomation.com/t/uncertain-initialvalue-for-large-tag-provider/73480 "2026-07-01T04:41:37Z")
At seemingly random time points, a large majority of our tags get the "Uncertain\_InitialValue" quality. This can be resolved by restarting the affected tag provider. However, it is unclear to us why this issue happens. … --- ## [I like to create a querry tag in an UDT using a parameter resulting in an error](https://forum.inductiveautomation.com/t/i-like-to-create-a-querry-tag-in-an-udt-using-a-parameter-resulting-in-an-error/116169)
**Author:** [@markus.deutsch](https://forum.inductiveautomation.com/u/markus.deutsch)\ **Replies:** 6\ **Last updated:** [July 1, 2026, 4:04am UTC](https://forum.inductiveautomation.com/t/i-like-to-create-a-querry-tag-in-an-udt-using-a-parameter-resulting-in-an-error/116169 "2026-07-01T04:04:12Z")
HI! I'm want to query the name of a machine from a mySQL-DB in an UDT using a parameter (Ignition 8.3.4). The Parameter is defined as a string with the value machineCode1(Without any ' ) SELECT machineName FROM table… --- ## [\[IGN-14601\] Database Query Browser can destroy table records when editing sorted data](https://forum.inductiveautomation.com/t/ign-14601-database-query-browser-can-destroy-table-records-when-editing-sorted-data/111611)
**Author:** [@nminchin](https://forum.inductiveautomation.com/u/nminchin)\ **Replies:** 8\ **Last updated:** [June 30, 2026, 11:14pm UTC](https://forum.inductiveautomation.com/t/ign-14601-database-query-browser-can-destroy-table-records-when-editing-sorted-data/111611 "2026-06-30T23:14:43Z")
v8.1 / v8.3 A colleague found out the hard way that if you sort the result set from a query in the DB query browser and then edit the records and apply them, the edits are applied to the same selected indexes (not ids),… --- ## [TickManager Warnings and Slow Siemens Tag Updates on Large Ignition 8.3](https://forum.inductiveautomation.com/t/tickmanager-warnings-and-slow-siemens-tag-updates-on-large-ignition-8-3/116218)
**Author:** [@Baskar\_Arumugam](https://forum.inductiveautomation.com/u/Baskar_Arumugam)\ **Replies:** 1\ **Last updated:** [June 30, 2026, 8:14pm UTC](https://forum.inductiveautomation.com/t/tickmanager-warnings-and-slow-siemens-tag-updates-on-large-ignition-8-3/116218 "2026-06-30T20:14:26Z")
Hi everyone, I'm facing a performance issue with the Siemens Enhanced Driver in Ignition 8.3 and would appreciate any suggestions. System Configuration Ignition Gateway: 8.3.x OPC Driver: Siemens Enhanced Driver Numbe… --- ## [Modbus 4XXXXX extended register in Siemens S7-1510, RTU via MOXA MB3180 gateway](https://forum.inductiveautomation.com/t/modbus-4xxxxx-extended-register-in-siemens-s7-1510-rtu-via-moxa-mb3180-gateway/116214)
**Author:** [@jwilbourn](https://forum.inductiveautomation.com/u/jwilbourn)\ **Replies:** 5\ **Last updated:** [June 30, 2026, 5:21pm UTC](https://forum.inductiveautomation.com/t/modbus-4xxxxx-extended-register-in-siemens-s7-1510-rtu-via-moxa-mb3180-gateway/116214 "2026-06-30T17:21:33Z")
Hello. I have a Siemens S7-1510SP PLC that I am trying to communicate with via Modbus RTU, through a Moxa MB3180 RTU to TCP gateway. The PLC currently communicates successfully with a Kepware server in this configuratio… --- ## [\[Errant?\] Error Message on Gateway Tag Script](https://forum.inductiveautomation.com/t/errant-error-message-on-gateway-tag-script/116209)
**Author:** [@gloweware](https://forum.inductiveautomation.com/u/gloweware)\ **Replies:** 3\ **Last updated:** [June 30, 2026, 3:56pm UTC](https://forum.inductiveautomation.com/t/errant-error-message-on-gateway-tag-script/116209 "2026-06-30T15:56:33Z")
Just upgraded to 8.3.7 from 8.3.1 and was modifying a Gateway Tag Change script when I received an error that previously did not exist. def onTagChange(initialChange, newValue, previousValue, event, executionCount): if… --- ## [\[BUG\] queryAggregatedPoints returning incorrect aggregates when no data between start/end](https://forum.inductiveautomation.com/t/bug-queryaggregatedpoints-returning-incorrect-aggregates-when-no-data-between-start-end/116210)
**Author:** [@eaolson](https://forum.inductiveautomation.com/u/eaolson)\ **Replies:** 0\ **Last updated:** [June 30, 2026, 3:49pm UTC](https://forum.inductiveautomation.com/t/bug-queryaggregatedpoints-returning-incorrect-aggregates-when-no-data-between-start-end/116210 "2026-06-30T15:49:34Z")
I'm using queryAggregatedPoints and had the misfortune of specifying start/end time in between actual data points. The aggregate values coming back are unexpected. Here is the raw data: "t\_stamp","mypath" "2026-06-09 … --- ## [Vision Current User in Alarm Display Path](https://forum.inductiveautomation.com/t/vision-current-user-in-alarm-display-path/116193)
**Author:** [@mcolson1590](https://forum.inductiveautomation.com/u/mcolson1590)\ **Replies:** 2\ **Last updated:** [June 30, 2026, 3:37pm UTC](https://forum.inductiveautomation.com/t/vision-current-user-in-alarm-display-path/116193 "2026-06-30T15:37:29Z")
Within Vision on Ignition Edge 8.1, I'm trying to capture the current user on a client in an alarm when a setpoint is changed. I have the following script, but the \[client\]\_Setup/CurrentUser shows up as null even though … --- ## [Dynamic bindings on a column](https://forum.inductiveautomation.com/t/dynamic-bindings-on-a-column/116208)
**Author:** [@motlaghr](https://forum.inductiveautomation.com/u/motlaghr)\ **Replies:** 1\ **Last updated:** [June 30, 2026, 3:30pm UTC](https://forum.inductiveautomation.com/t/dynamic-bindings-on-a-column/116208 "2026-06-30T15:30:54Z")
I made an imbedded view and made the indirect binding on the imbedded view with a param. now when i put it in my table i cant find how to bind it so that the param changes based on the row. I can only bind the param to a… --- ## [\[IGN-16741\] Received prop sync for missing view](https://forum.inductiveautomation.com/t/ign-16741-received-prop-sync-for-missing-view/50674)
**Author:** [@paul.longtine](https://forum.inductiveautomation.com/u/paul.longtine)\ **Replies:** 12\ **Last updated:** [June 30, 2026, 1:14pm UTC](https://forum.inductiveautomation.com/t/ign-16741-received-prop-sync-for-missing-view/50674 "2026-06-30T13:14:15Z")
Every so often our Perspective project runs into log messages scoped at perspective.ClientSession with a message of Received prop sync for missing view. What scenario would trigger this message on the gateway? Is a clie… --- ## [Alarm in Array and Tag Group](https://forum.inductiveautomation.com/t/alarm-in-array-and-tag-group/116205)
**Author:** [@MaximePuntis](https://forum.inductiveautomation.com/u/MaximePuntis)\ **Replies:** 0\ **Last updated:** [June 30, 2026, 12:59pm UTC](https://forum.inductiveautomation.com/t/alarm-in-array-and-tag-group/116205 "2026-06-30T12:59:14Z")
I just discovered a bug. I use boolean arrays to report alarms, and the alarm text is linked to a string array. A quick detail: these two arrays are tags derived from a "Document"-type source in the PLC (S7-1500, communi… --- ## [How to track which views a Designer user opens without modifying them?](https://forum.inductiveautomation.com/t/how-to-track-which-views-a-designer-user-opens-without-modifying-them/116146)
**Author:** [@prasoon](https://forum.inductiveautomation.com/u/prasoon)\ **Replies:** 14\ **Last updated:** [June 29, 2026, 11:55pm UTC](https://forum.inductiveautomation.com/t/how-to-track-which-views-a-designer-user-opens-without-modifying-them/116146 "2026-06-29T23:55:35Z")
We are tracking user activity in our audit log idaa\_t\_audit\_event. We have successfully implemented page visit tracking for Perspective sessions using a custom prop on the Header view with an onChange script. We can also… --- ## [Handling Alarm reset](https://forum.inductiveautomation.com/t/handling-alarm-reset/116197)
**Author:** [@SOPerator](https://forum.inductiveautomation.com/u/SOPerator)\ **Replies:** 0\ **Last updated:** [June 29, 2026, 11:25pm UTC](https://forum.inductiveautomation.com/t/handling-alarm-reset/116197 "2026-06-29T23:25:21Z")
Hello, I have two tags: one is a query tag that returns up to one row using SELECT TOP 1, and the other one is an expression tag using the expression len({\[.\]ScaleBelowMinSpread.value}) = 0 basically checking to see if … [Previous page](https://forum.inductiveautomation.com/c/ignition/6.md?no_subcategories=false&page=25) [Next page](https://forum.inductiveautomation.com/c/ignition/6.md?no_subcategories=false&page=27)