I'm having trouble using the download feature in JEmplode. In vers. 45 and in 52 on OSX, when I choose a playlist or song to download it generally fails all of the songs with the error "(invalid argument)".

My first guess is that this has something to do with characters in filenames.

Some songs I have been able to download using the filename format {title}{ext}, but if I put fancy things like hyphens or underscores, like {artist}_{title}{ext} they all fail. When it works, it works for the same few songs every time: I have three Garbage albums and when I tell it to download everything under Garbage, I get a nice directory structure but only five songs out of 39 succeed.

I can't figure out what is causing it to fail on the rest of those songs.

The player is running Hijack v361