Did you quote the path? Remember, the backslash character is special to the shell. It's the "escape character". So the shell will strip the backslashes away unless you either escape them: winepath -u Z:\\Applications\\Firefly\\BENCH1.out or put the path in *single* quotes: winepath -u 'Z:\Applications\Firefly\BENCH1.out' Double quotes don't work because the shell still interprets backslashes inside of them. Chip