c:\test|z:\temp? /fn
and you try and MDBU/preview/HB/open one of the files from each location, only the files from the first c:\test path will work, the other files, though visible in the list, will not work, the file isn't found. Infotips still mostly work though, but some values are bogus. If one of the files are attempted to be opened, a message is shown: Could not find "c:\temp\file.ext", notice it has used the drive letter from the first path, and the folder from the second path.