I am trying to extract F0 contours with swipe for a long list of files. When I run it on some voices, it works fine but on others I get the error below. I don't understand why it is saying to specify an input file with -i or why there is this strange symbol after the wav? I have checked file permissions and directory permissions and they are the same for the files that do work and the files that don't.

If I create a symbolic link from the swipe directory to the problem directory and run ./swipe -i wav48/sn001_sent001.wav I have no problems. Note that the original directory is a mounted drive on a linux system. But as I said, I only have problems with certain voice directories, and not others.

./swipe -i /data/user/merlin_data/voice/wav48/sn001_sent001.wav
Reading from "/data/user/merlin_data/voice/wav48/sn001_sent001.wav�" failed (try specifying an input file with -i).

Any idea what I could do to make swipe read these files without problems?