getRandomSongs returns null pointer exception

[heddhunter]

If I include a non-zero musicFolderId in the api call, it returns null pointer exception every time.

eg:
http://myserver:4040/rest/getRandomSong ... id&v=1.6.0

{"subsonic-response": {
"error": {
"message": "NullPointerException",
"code": 0
},
"status": "failed",
"xmlns": "http://subsonic.org/restapi",
"version": "1.10.2"
}}