I did that and a party that no longer exists on the particular scenrio disk is constantly reloaded. I disbanded that group and reformed another, followed your suggestions and yet Im still getting parties of characters that do not exist on that scenrio disk file.
Are you running 2 instances at the same time? That wouldn’t work.
Here’s another thing that should always work (as long as you’re running a single instance of the game at once):
Back up your scenario files in the saved games folder to another folder, then move the ones you want into the saved games folder every time you want to run a different party. Keep your different scenarios in their own folders and move them to the saved games folder before playing.