[Tkinter] bad window path name

[jdos]

The error appears to be coming from the window you're opening. It shows button3. You might want to check that.

I know as I said in the first post, the called program (say program1) works correctly without any errors though it takes some time to load when started on its own. The issue is when I try to load it via the loader program it is then that the error occurs.
If you check the video you can see that.