ts3bot error log

2013-06-06 22:31:41	START_MOD	Virtual bot instance "TS3MusicBot" starts now
2013-06-06 22:31:41	START_INFO	Successful connected to ts.kamaaan.org!
2013-06-06 22:31:42	START_INFO	Login as "serveradmin" successful!
2013-06-06 22:31:42	START_INFO	Successful selected virtual server 1!
2013-06-06 22:31:42	START_SUCCESSFUL	Bot started and connected successful, write !botinfo in server chat to get an answer!
2013-06-06 22:32:41	TS3MusicBot: EXCEPTION - Bot Version: 3.1.5 (07.06.2013)
java.lang.NullPointerException
   at jts3servermod.s.a(Unknown Source)
   at jts3servermod.h.d(Unknown Source)
   at jts3servermod.h.a(Unknown Source)
   at a.c.run(Unknown Source)
   at java.lang.Thread.run(libgcj.so.10)