# Passing String Array to Popup Window

**URL:** <https://forum.inductiveautomation.com/t/passing-string-array-to-popup-window/113579>\
**Category:** Ignition\
**Tags:** vision, ignition81, scripting\
**Created:** [January 27, 2026, 8:48pm UTC](https://forum.inductiveautomation.com/t/passing-string-array-to-popup-window/113579 "2026-01-27T20:48:48Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![tbennett.tdc](https://avatars.discourse-cdn.com/v4/letter/t/54ee81/32.png) [@tbennett.tdc](https://forum.inductiveautomation.com/u/tbennett.tdc)\
**Post date:** [January 27, 2026, 8:48pm UTC](https://forum.inductiveautomation.com/t/passing-string-array-to-popup-window/113579/1 "2026-01-27T20:48:48Z")

</div>

I am trying to pass some information to an EasyChart in another window. I’ve read a bunch of topics and manual entries and have created the following code to pass the info to the next window.

```python
# Initialize variables
penNames = []
penPaths = []

#Configure graph pen historical tags
#Provider will be the same for all historical tags
tagPathSP = event.source.parent.PIDTagInstance.Meta.TagPath + "/SP"
tagPathStr = tagPathSP + ".HistoryProvider"
provider = system.tag.readBlocking([tagPathStr])[0].value
penPathSP = tagPathSP.replace("default", provider, 1)
penPaths.append(penPathSP)
penNameSP = 'SP'
penNames.append(penNameSP)
print penNameSP

tagPathPV = event.source.parent.PIDTagInstance.Meta.TagPath + "/PV"
penPathPV = tagPathPV.replace("default", provider, 1)
penPaths.append(penPathPV)
penNamePV = 'PV'
penNames.append(penNamePV)
print penNamePV

tagPathM1 = event.source.parent.M1TagInstance.Meta.TagPath + "/OutputSpeed"
penPathM1 = tagPathM1.replace("default", provider, 1)
penPaths.append(penPathM1)
penNameM1 = event.source.parent.M1TagInstance.MotorNum
penNames.append(penNameM1)
print penNameM1

tagPathM2 = event.source.parent.M2TagInstance.Meta.TagPath + "/OutputSpeed"
penPathM2 = tagPathM2.replace("default", provider, 1)
penPaths.append(penPathM2)
penNameM2 = event.source.parent.M2TagInstance.MotorNum
penNames.append(penNameM2)
print penNameM2

maxRange = event.source.parent.ChartMaxY
minRange = event.source.parent.ChartMinY

title = event.source.parent.TitleText

for item in penNames:
	print str(item)
	
#Set parameters for the next window
#params = {"PenPath1": penPathSP, "PenPath2": penPathPV, "PenPath3":penPathM1, "PenPath4": penPathM2, "MaxRange": maxRange, "MinRange": minRange, "WindowTitle": title}
params = {"PenNames": penNames, "PenPaths": penPaths, "MaxRange": maxRange, "MinRange": minRange, "WindowTitle": title}

#Close current window
window_path = system.nav.getCurrentWindow()
system.nav.closeWindow(window_path)

#Open new window with these parameters
system.nav.swapTo('Trends\TrendGraph', params)

```

I then have some code in the “visionWindowOpened event to show what was received as array parameters. The code looks like this.

```python
root_container = system.gui.getParentWindow(event).getComponentForPath("Root Container")

received_array = root_container.PenNames
print str(received_array)
for item in received_array:
	print str(item)

```

This is what I get from the the Diagnostics Console when I invoke the window change.

 ![Screenshot 2026-01-27 154217](https://us1.discourse-cdn.com/inductiveautomation/original/3X/0/7/07c610485ec417502d504f463c8843cdd9161e62.png)

I see each individual string with the correct data. I also see the array in the original window with the correct data. When it gets to the second window, the string array looks like it is a bunch of individual ASCII values as an array, not a string array.

I’m sure I’m missing something simple since I’ve seen this topic from back in 2019 where this worked after a bug fix. Please help me with this if you can.

---

<div class="post-metadata">

**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:** [January 27, 2026, 8:54pm UTC](https://forum.inductiveautomation.com/t/passing-string-array-to-popup-window/113579/2 "2026-01-27T20:54:45Z")

</div>

Pass datasets, not arrays. Vision cannot (reliably) do array parameters since it doesn't support array properties.

---

<div class="post-metadata">

**Author:** ![tbennett.tdc](https://avatars.discourse-cdn.com/v4/letter/t/54ee81/32.png) [@tbennett.tdc](https://forum.inductiveautomation.com/u/tbennett.tdc)\
**Post date:** [January 27, 2026, 9:05pm UTC](https://forum.inductiveautomation.com/t/passing-string-array-to-popup-window/113579/3 "2026-01-27T21:05:29Z")

</div>

OK. I was just starting to look at this as an option.

THANKS.