Closing a Vision Window on Error in visionWindowOpened

Ignition
,
1

I have an instance where a Try:Catch is throwing an exception in my visionWindowOpened. In this case, I want to display a MessageBox for the operator and then close out the Window once they acknowledge the error.
The message box piece works, but I cannot seem to close the window. I get a Java error when I try to close the window. I assume this is because the Window has not completed the Open at this point. Is there a way around this?

Example:
system.gui.messageBox(“Please verify system is online.”,“System Unavailable.”)
system.nav.closeWindow("{Window Name}")

Also tried system.nav.closeWindow(event.source)

2

Can you post your complete script of your visionWindowOpened?

3 
try:
if	system.gui.getParentWindow(event).getComponentForPath('Root Container.tblLocationCodes').data == None
system.gui.getParentWindow(event).getComponentForPath('Root Container').errorWindowsClose = False
except:
	system.gui.messageBox("Please verify system is online","System Unavailable.")
	system.nav.closeWindow("addLocationCode")

I am reaching the MessageBox as expected, but am getting a Java NullPointer error on the closeWindow. I pulled out all of the code except for the closeWindow command and got the same error.

4

Are you sure that is the exact spelling of your window name? What happens if you use this instead
system.nav.closeParentWindow(event)

5

Using system.nav.closeParentWindow(event) yields the same java error.

6

Get the error again, click on “Details” in the error message box, and paste that here.

7

Please also show the lines that open that popup window.

8 
window = system.nav.openWindow('addLocationCode', {'parentPath':parentPath, 'componentName':componentName, 'agvSystemID': agvSystemID})
system.nav.centerWindow(window)

Error on Close:
Traceback (most recent call last):
File “event:actionPerformed”, line 11, in
java.lang.NullPointerException: java.lang.NullPointerException

caused by NullPointerException

Ignition v8.1.7 (b2021060314)
Java: Azul Systems, Inc. 11.0.11

I was able to get around this by setting a custom property and then checking for that property to change in the Root Container Script. It works, but seems like a lot of extra code.