Save Copy As error message

[dmacintyre]

Any time I try to open a project that has been saved using the "save copy as" command I get this :

"The original disk allocation for this session cannot be used. Check the disk allocation window to see what's changed."

Project opens OK and everything seems OK but the message is annoying. I even get it after saving the copied session normally with "save", closing and reopening the session. Once it has been saved as a copy, the error stays with the session. Any ideas how to get rid of this?

Also, why does the "save copy in" command create new folder, session plugs folder, etc but "save as" doesn't? I prefer to "save as" so that the current session updates to the newly saved version but I'm concerned that the existing session files and folders are not being copied across to the new file.

Thanks

David