Hi @AndyU,
Maybe try passing in the additional command line argument -nojournal when you launch your Python script. So try running:
"C:\Program Files\Coreform Cubit 2024.3\bin\coreform_cubit.exe" -nojournal boot.py
I unfortunately don’t have a Windows machine to test this on at the moment, but this worked for me on macOS.
Keep us posted 
Cheers,
Pat