---- Minecraft Crash Report ----
// You should try our sister game, Minceraft!

Time: 10/18/15 1:18 PM
Description: Watching Server

java.lang.Error
        at java.io.FileOutputStream.open(Native Method)
        at java.io.FileOutputStream.<init>(FileOutputStream.java:221)
        at java.io.FileOutputStream.<init>(FileOutputStream.java:171)
        at atm.a(SourceFile:121)
        at atj.a(SourceFile:43)
        at le.a(SourceFile:798)
        at le.a(SourceFile:758)
        at net.minecraft.server.MinecraftServer.a(SourceFile:364)
        at net.minecraft.server.MinecraftServer.A(SourceFile:553)
        at net.minecraft.server.MinecraftServer.run(SourceFile:451)
        at java.lang.Thread.run(Thread.java:744)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
        at java.io.FileOutputStream.open(Native Method)
        at java.io.FileOutputStream.<init>(FileOutputStream.java:221)
        at java.io.FileOutputStream.<init>(FileOutputStream.java:171)
        at atm.a(SourceFile:121)
        at atj.a(SourceFile:43)
        at le.a(SourceFile:798)
        at le.a(SourceFile:758)
        at net.minecraft.server.MinecraftServer.a(SourceFile:364)
        at net.minecraft.server.MinecraftServer.A(SourceFile:553)

-- Thread Dump --
Details:
        Threads: "Netty Server IO #15" Id=33 RUNNABLE (in native)
        at sun.nio.ch.KQueueArrayWrapper.kevent0(Native Method)
        at sun.nio.ch.KQueueArrayWrapper.poll(KQueueArrayWrapper.java:200)
        at sun.nio.ch.KQueueSelectorImpl.doSelect(KQueueSelectorImpl.java:103)
        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
        -  locked io.netty.channel.nio.SelectedSelectionKeySet@53351da6
        -  locked java.util.Collections$UnmodifiableSet@116e6c19