It looks like you're new here. Sign in or register to get started.
What operating system are you using?
This shouldn't happen, as internals on RapidMiner normally write files in UTF-8 format and internationalized, but I've broken a few repos due to a few magic tricks I tried to do to speed up my development process even more.
@kayman is right about his solution. Create a new repository and move your files (from the file system) until you get the culprit. I know it's not quite a fun thing, but this way we can know if there is something special you did that ended up breaking the repo.
BTW, repositories are just directories that are declared in an xml file as metadata. If you are in the mood, you may want to review that with an XML viewer (any browser can give you formatted XML with certain browser extensions).