# Root container script triggers only once **URL:** \ **Category:** Ignition\ **Tags:** vision, scripting\ **Created:** [August 21, 2023, 9:19am UTC](https://forum.inductiveautomation.com/t/root-container-script-triggers-only-once/78140 "2023-08-21T09:19:07Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![Stephane\_Boneff](https://avatars.discourse-cdn.com/v4/letter/s/59ef9b/32.png) [@Stephane\_Boneff](https://forum.inductiveautomation.com/u/Stephane_Boneff)\ **Post date:** [August 21, 2023, 9:19am UTC](https://forum.inductiveautomation.com/t/root-container-script-triggers-only-once/78140/1 "2023-08-21T09:19:07Z")
Hello, I need to fix a Vision V 8.1.17 app that I didn't write. problem : a script with invokeAsynchronous triggers the root container only once. On a view, a button triggers this script (XXX can take some seconds to end) : ```auto [...] def longProcess(rootContainer = event.source.parent.parent): import system results = XXX() def sendBack(results = results, rootContainer = rootContainer): rootContainer.resultsProperty = results system.util.invokeLater(sendBack) system.util.invokeAsynchronous(longProcess) ``` the root container starts with ```auto [...] print 'inside RC !' if event.propertyName == "resultsProperty": blabla ``` At the first execution, the script works normally. ( "inside RC!" is printed in the log and blabla is well executed) Then the root container script is no longer executed ! ("inside RC!" no longer appears). if I change views, then the script works again, again only once. Someone to help me ? Thanks ! ---
**Author:** ![lrose](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/lrose/32/62724_2.png) [@lrose](https://forum.inductiveautomation.com/u/lrose)\ **Post date:** [August 21, 2023, 12:01pm UTC](https://forum.inductiveautomation.com/t/root-container-script-triggers-only-once/78140/2 "2023-08-21T12:01:00Z")
Where "exactly" is this script on the button? Are you testing this in the designer or in an actual client? That can make a difference. The fact that `print 'inside RC !' is only printing once, makes me feel like there is more context to these scripts then what your showing, as if that line was really the top line a property change script of the Root Container, you would definitely have it printed more than once. ---
**Author:** ![Stephane\_Boneff](https://avatars.discourse-cdn.com/v4/letter/s/59ef9b/32.png) [@Stephane\_Boneff](https://forum.inductiveautomation.com/u/Stephane_Boneff)\ **Post date:** [August 21, 2023, 12:36pm UTC](https://forum.inductiveautomation.com/t/root-container-script-triggers-only-once/78140/3 "2023-08-21T12:36:20Z")
The button is on the container: HOME (with startup script) \_\_Root container (with script) \_\_\_\_container \_\_\_\_\_\_the button (so with script) The problem occurs in preview mode as well as with client. Yes, the line 'inside RC!' is printing more that once. eg : First run: ```auto 14:24:07.941 [AWT-EventQueue-0] INFO vision.App - Starting Up.. inside RC !resultsProperty inside RC !qualityList inside RC !dataQuality inside RC !background$Quality inside RC !componentRunning [...] blabla (print out of the function longProcess) inside RC !resultsProperty -> execution ok ``` But, on the next try 'inside RC!' is never printed, as long as I stay on the same window. In the root container, there is a try except section. if ok then it does a system.nav.swapWindow if except then it only does event.source.getComponent('Container').getComponent('errorMsg').visible= 1 ---
**Author:** ![lrose](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/lrose/32/62724_2.png) [@lrose](https://forum.inductiveautomation.com/u/lrose)\ **Post date:** [August 21, 2023, 1:09pm UTC](https://forum.inductiveautomation.com/t/root-container-script-triggers-only-once/78140/4 "2023-08-21T13:09:25Z")
Okay, I threw together a quick test in my environment to try and replicate and was unable to replicate what you're seeing. If you can't post the actual code then I would suggest you call into support, as it would appear that the issue is somewhere inside of one of the scripts. I'm not sure how much we're going to be able to help you without more information. Window structure: ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/1/0/108ca9541570057c534d7a13cd44558e2cb492ae.png) Property Change script on RootContainer: ```auto if event.propertyName == 'resultsProperty': print 'execute blabla' ``` Action performed script on button: ```python def xxx(): processStart = system.date.now() count = 0 seconds = 2 while system.date.isBetween(system.date.now(),processStart,system.date.addSeconds(processStart,seconds): count += 1 return str(count) def longProcess(rootContainer = event.source.parent.parent): results = xxx() def sendBack(results = results,rootContainer = rootContainer): rootContainer.resultsProperty = results system.util.invokeLater(sendBack) system.util.invokeAsynchronous(longProcess) ``` ![async](https://us1.discourse-cdn.com/inductiveautomation/original/3X/b/f/bfcfb7d7646eeaf1e512a0675c47d4bc93e57db6.gif) ---
**Author:** ![Stephane\_Boneff](https://avatars.discourse-cdn.com/v4/letter/s/59ef9b/32.png) [@Stephane\_Boneff](https://forum.inductiveautomation.com/u/Stephane_Boneff)\ **Post date:** [August 21, 2023, 1:35pm UTC](https://forum.inductiveautomation.com/t/root-container-script-triggers-only-once/78140/5 "2023-08-21T13:35:41Z")
Here the begining of root container script : ```auto import java.lang.Exception from java.sql import SQLException from MES.VARIABLES_GLOBALES import * import ast print 'inside RC !' + event.propertyName if event.propertyName == "resultsProperty": [..] ``` Here is an complet example of script for the button ```auto import java.lang.Exception from java.sql import SQLException from MES.VARIABLES_GLOBALES import * import ast event.source.parent.getComponent('errorMsg').visible = 0 # on masque le messssage d'erreur de scan event.source.componentEnabled = False # SB pendant la lecture, on neutralise le bouton event.source.scanEnCours = True # on active 'scan en cours..." sur le bouton print 'Debut script clic ' + str(system.date.now()) def longProcess(rootContainer = event.source.parent.parent): import system print 'avant readTagdata ' + str(system.date.now()) results={'ERREUR': 'Message non conforme : '} print ' apres readTagdata ' + str(system.date.now()) def sendBack(results = results, rootContainer = rootContainer): rootContainer.resultsProperty = results print '3 apres rp=Res ' + str(system.date.now()) system.util.invokeLater(sendBack) print '4 apres invokelater ' + str(system.date.now()) system.util.invokeAsynchronous(longProcess) print 'FIN traitement clic ' + str(system.date.now()) ``` log: ```auto Debut script clic Mon Aug 21 15:36:21 CEST 2023 avant readTagdata Mon Aug 21 15:36:21 CEST 2023 apres readTagdata Mon Aug 21 15:36:21 CEST 2023 3 apres rp=Res Mon Aug 21 15:36:21 CEST 2023 inside RC !resultsProperty resultsProperty non vide{'ERREUR': 'Message non conforme : '} dicoRFid_API = tagResult {'ERREUR': 'Message non conforme : '} Dan TRY RC Home Dans Exept ! du RC ``` log for next try : ```auto Debut script clic Mon Aug 21 15:37:00 CEST 2023 avant readTagdata Mon Aug 21 15:37:00 CEST 2023 apres readTagdata Mon Aug 21 15:37:00 CEST 2023 3 apres rp=Res Mon Aug 21 15:37:00 CEST 2023 ``` ---
**Author:** ![lrose](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/lrose/32/62724_2.png) [@lrose](https://forum.inductiveautomation.com/u/lrose)\ **Post date:** [August 21, 2023, 1:47pm UTC](https://forum.inductiveautomation.com/t/root-container-script-triggers-only-once/78140/6 "2023-08-21T13:47:47Z")
```auto results={'ERREUR': 'Message non conforme : '} ``` This never changes, why would the property change event fire if the property isn't changing? You can see in your second try, that the line printed after you "set" the property is executing. ---
**Author:** ![Stephane\_Boneff](https://avatars.discourse-cdn.com/v4/letter/s/59ef9b/32.png) [@Stephane\_Boneff](https://forum.inductiveautomation.com/u/Stephane_Boneff)\ **Post date:** [August 21, 2023, 1:51pm UTC](https://forum.inductiveautomation.com/t/root-container-script-triggers-only-once/78140/7 "2023-08-21T13:51:05Z")
It is for this test only. but maybe you gave me the solution : the property don't change with the real command (when pb occurs). I have to force it to change after the first exec ---
**Author:** ![lrose](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/lrose/32/62724_2.png) [@lrose](https://forum.inductiveautomation.com/u/lrose)\ **Post date:** [August 21, 2023, 1:54pm UTC](https://forum.inductiveautomation.com/t/root-container-script-triggers-only-once/78140/8 "2023-08-21T13:54:03Z")
If the property changes, then the property change script will fire, if it doesn't, then it won't. If I alter my test to return a constant value, it only fires once, just as you are seeing. ---
**Author:** ![Stephane\_Boneff](https://avatars.discourse-cdn.com/v4/letter/s/59ef9b/32.png) [@Stephane\_Boneff](https://forum.inductiveautomation.com/u/Stephane_Boneff)\ **Post date:** [August 21, 2023, 2:00pm UTC](https://forum.inductiveautomation.com/t/root-container-script-triggers-only-once/78140/9 "2023-08-21T14:00:32Z")
yes thanks ! I have to found how change event.propertyName after the first try. I don't know if it's the good way but it's working : I add a line **event.source.parent.parent.resultsProperty=0** at the beginning of lingProcess: ```auto def longProcess(rootContainer = event.source.parent.parent): import system # Do something here with the database that takes a long time. event.source.parent.parent.resultsProperty=0 [...] ``` Thanks for you help, I spent hours for this problem !! (I begin in Ignition script so it's not very easy for me.) ---
**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\ **Post date:** [August 21, 2023, 2:18pm UTC](https://forum.inductiveautomation.com/t/root-container-script-triggers-only-once/78140/10 "2023-08-21T14:18:11Z")
> [@Stephane\_Boneff](#): > > I don't know if it's the good way but it's working It is not. You are writing to a Swing property from a background thread. This can randomly crash your Vision client. Move it to the button script, at some point before the `invokeAsynchronous()`. ---
**Author:** ![Stephane\_Boneff](https://avatars.discourse-cdn.com/v4/letter/s/59ef9b/32.png) [@Stephane\_Boneff](https://forum.inductiveautomation.com/u/Stephane_Boneff)\ **Post date:** [August 22, 2023, 7:09am UTC](https://forum.inductiveautomation.com/t/root-container-script-triggers-only-once/78140/11 "2023-08-22T07:09:35Z")
yes thanks, I did that. Works fine !