latest.log

[20:15:28] [Server thread/ERROR]: Encountered an unexpected exception
net.minecraft.util.ReportedException: Exception ticking world
        at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:631) ~[MinecraftServer.class:?]
        at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:334) ~[lt.class:?]
        at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:547) ~[MinecraftServer.class:?]
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:427) [MinecraftServer.class:?]
        at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685) [li.class:?]
Caused by: java.lang.NullPointerException
        at net.minecraft.server.management.PlayerManager.func_72693_b(PlayerManager.java:67) ~[mq.class:?]
        at net.minecraft.world.WorldServer.func_72835_b(WorldServer.java:185) ~[mt.class:?]
        at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:625) ~[MinecraftServer.class:?]
        ... 4 more
[20:15:28] [Server thread/ERROR]: This crash report has been saved to: /app/minecraft/ramdisks/ftb_direwolf20_17/./crash-reports/crash-2015-04-05_20.15.28-server.txt
[20:15:28] [Server thread/INFO]: Stopping server
[20:15:28] [Server thread/INFO]: Saving players
[20:15:28] [Server thread/INFO]: Saving worlds
[20:15:28] [Server thread/INFO]: Saving chunks for level 'ftb_direwolf20_17_w1'/Overworld
[20:15:28] [Server thread/INFO]: Saving chunks for level 'ftb_direwolf20_17_w1'/Nether
[20:15:28] [Server thread/INFO]: Saving chunks for level 'ftb_direwolf20_17_w1'/FZHammer