_tkinter.TclError: can't invoke "winfo" command: application has been destroyed

[jk05215]

Hi there, I currently ran into an error which I don't really understand as a beginner. I'm starting a small CTk Project and as I quit the window with command + q (on Mac) I always get the same Troubleshooting. Does anyone know what you can do about it?

Exception in Tkinter callback
Traceback (most recent call last):
File ".../anaconda3/envs/envapp/lib/python3.11/tkinter/init.py", line 1967, in call
return self.func(*args)

File ".../anaconda3/envs/envapp/lib/python3.11/tkinter/init.py", line 861, in callit
func(*args)

File ".../anaconda3/envs/envapp/lib/python3.11/site-packages/customtkinter/windows/widgets/scaling/scaling_tracker.py", line 178, in check_dpi_scaling
if window.winfo_exists() and not window.state() == "iconic":

File ".../anaconda3/envs/envapp/lib/python3.11/tkinter/init.py", line 1139, in winfo_exists
self.tk.call('winfo', 'exists', self._w))

_tkinter.TclError: can't invoke "winfo" command: application has been destroyed

Those line references aren't very helpful.

Μy current code looks like this:

`
import tkinter
import customtkinter

customtkinter.set_appearance_mode("System") # Modes: "System" (standard), "Dark", "Light"
customtkinter.set_default_color_theme("green") # Themes: "blue" (standard), "green", "dark-blue"

----------------- Functions ---------------------------------

def change_appearance_mode_event(new_appearance_mode: str):
customtkinter.set_appearance_mode(new_appearance_mode)

def change_scaling_event(new_scaling: str):
new_scaling_float = int(new_scaling.replace("%", "")) / 100
customtkinter.set_widget_scaling(new_scaling_float)

----------------- Window Config ----------------------------

root = customtkinter.CTk()
root.title("CustomTkinter complex_example.py")
root.geometry(f"{1100}x{580}")

----------------- Grid Layout --------------------------------

    # configure grid layout (4x4)

root.grid_columnconfigure(1, weight=1)
root.grid_columnconfigure((2, 3), weight=0)
root.grid_rowconfigure((0, 1, 2), weight=1)

----------------- Left - Frame -------------------------------

sidebar_frame = customtkinter.CTkFrame(root, width=140, corner_radius=0)
sidebar_frame.grid(row=0, column=0, rowspan=4, sticky="nsew")
sidebar_frame.grid_rowconfigure(4, weight=1)

----------------- Header ---------------------------------

logo_label = customtkinter.CTkLabel(sidebar_frame, text="CustomTkinter", font=customtkinter.CTkFont(size=20, weight="bold"))
logo_label.grid(row=0, column=0, padx=20, pady=(20, 10))

----------------- Config ---------------------------------

appearance_mode_label = customtkinter.CTkLabel(sidebar_frame, text="Appearance Mode:", anchor="w")
appearance_mode_label.grid(row=5, column=0, padx=20, pady=(10, 0))
appearance_mode_optionemenu = customtkinter.CTkOptionMenu(sidebar_frame, values=["Light", "Dark", "System"],command=change_appearance_mode_event)
appearance_mode_optionemenu.grid(row=6, column=0, padx=20, pady=(10, 10))

scaling_label = customtkinter.CTkLabel(sidebar_frame, text="UI Scaling:", anchor="w")
scaling_label.grid(row=7, column=0, padx=20, pady=(10, 0))
scaling_optionemenu = customtkinter.CTkOptionMenu(sidebar_frame, values=["80%", "90%", "100%", "110%", "120%"],command=change_scaling_event)
scaling_optionemenu.grid(row=8, column=0, padx=20, pady=(10, 20))

----------------- Locals ---------------------------------

appearance_mode_optionemenu.set("System")
scaling_optionemenu.set("100%")

if name == "main":
root.mainloop()`

It is pretty much the example Code broken down in some smaller pieces.