It’s not possible to save a file or Montage on a folder with a space at the end of the name…
This is forbidden by Windows.
I’m on OSX…
WaveLab prevents this to happen on OSX, else the files won’t be able to be transfered on Windows. Maybe you don’t mind, but some people do and this would be a door to problems…
Oh, ok. I don’t mind…
Sometimes I receive some folders like that, and I had this ‘issue’ when saving… Cause it’s difficult to guess the space before the name… 
But no problem, I know that now.