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...will be read by some other software we use. Unfortunately, it can only handle file paths with back slashes (MS Windows convention), and from R, I get file paths with forward slashes. The following didn't work. > gsub('/', '\\', 'c:/dir1/dir2/file.ext') [1] "c:dir1dir2file.ext" > gsub('/', '\\\\', 'c:/dir1/dir2/file.ext') [1] "c:\\dir1\\dir2\\file.ext" I have tried to find an answer on R-help, but didn't ;-( Thanks for helping me, Kind regards, J?rg Dr. J?rg Klausen phone : +41 (0)44 823 41 27 EM...