Closing a Visit Window in python and closing the session

[Nathquad]

So let me explain the part of my code that uses Visit . Using QFileDialog from PyQt , I'm able to select a file that I'm going to plot on a mesh plot . I open my database , i add the plot and then I draw the plot . Everything up till here works great . However once I press the X button . I get this error : VisIt: Error - Can't delete the last window. As a result of this even though the window has closed , the script doesn't stop running . This script is part of a larger GUI which is why its causing me issues . Here is the code :

`import sys
import time
import os
from PyQt6.QtWidgets import QApplication, QMainWindow, QFileDialog



sys.path.append("M:/Visit/LLNL/VisIt3.4.1/lib/site-packages")

def display_file():
    file, _ = QFileDialog.getOpenFileName()
    print(file)
    if file != '':
        # Normalize the file path
        File = os.path.normpath(file)
        print("File selected:", File)

        import visit
        print( 'Before:' , dir(visit))
        visit.Launch()
        import visit
        print('After:',dir(visit))

        try:
            visit.OpenDatabase(File)
        except AttributeError as e:
            print(f"Error: {e}")
    
            return


        try:
     
            visit.AddPlot("Mesh", "mesh")

      
            visit.DrawPlots()


        except RuntimeError as e:
            print(f"Error creating plot: {e}")
            return
`

[Nathquad]

@markcmiller86 . I would really appreciate your help on this

[Nathquad]

1. yes
2. because i get an error otherwise
3. Ill try that in a minute and let you know

[Nathquad]

@biagas . It still crashes :( . any other functions I can use to ensure VisIt is completely closed

[biagas]

You may have to place your 'import visit' and visit.Launch() commands in the global space. Otherwise, not sure. Really need to find out if VisIt behaves correctly on its own. Both through gui and cli before attempting to connect it to your app and PyQt.

[Nathquad]

I'll try that

[Nathquad]

.@biagas . In regards to it behaving normally . When I run the visit stuff ( display_file and close_visit) on a another script I notice that when I close Visit . The script doesnt stop running . I have to manually press the stop button on the script in my pycharm IDE