[20:50:05 INFO]: even16 issued server command: //set glass
[20:50:05 ERROR]: Could not pass event PlayerCommandPreprocessEvent to LimitedWorldEdit v1.0.7
org.bukkit.event.EventException
        at com.massivecraft.massivelag.inject.event.MassiveLagEventExecutor.execute(MassiveLagEventExecutor.java:77) ~[?:?]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[Spigot.jar:git-Spigot-5f38d38-18fbb24]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [Spigot.jar:git-Spigot-5f38d38-18fbb24]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [Spigot.jar:git-Spigot-5f38d38-18fbb24]
        at net.minecraft.server.v1_8_R3.PlayerConnection.handleCommand(PlayerConnection.java:1154) [Spigot.jar:git-Spigot-5f38d38-18fbb24]
        at net.minecraft.server.v1_8_R3.PlayerConnection.a(PlayerConnection.java:997) [Spigot.jar:git-Spigot-5f38d38-18fbb24]
        at net.minecraft.server.v1_8_R3.PacketPlayInChat.a(PacketPlayInChat.java:45) [Spigot.jar:git-Spigot-5f38d38-18fbb24]
        at net.minecraft.server.v1_8_R3.PacketPlayInChat.a(PacketPlayInChat.java:1) [Spigot.jar:git-Spigot-5f38d38-18fbb24]
        at net.minecraft.server.v1_8_R3.PlayerConnectionUtils$1.run(SourceFile:13) [Spigot.jar:git-Spigot-5f38d38-18fbb24]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_60]
        at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_60]
        at net.minecraft.server.v1_8_R3.SystemUtils.a(SourceFile:44) [Spigot.jar:git-Spigot-5f38d38-18fbb24]
        at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:715) [Spigot.jar:git-Spigot-5f38d38-18fbb24]
        at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:374) [Spigot.jar:git-Spigot-5f38d38-18fbb24]
        at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:654) [Spigot.jar:git-Spigot-5f38d38-18fbb24]
        at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:557) [Spigot.jar:git-Spigot-5f38d38-18fbb24]
        at java.lang.Thread.run(Thread.java:745) [?:1.8.0_60]
Caused by: java.lang.NumberFormatException: For input string: "glass"
        at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65) ~[?:1.8.0_60]
        at java.lang.Integer.parseInt(Integer.java:580) ~[?:1.8.0_60]
        at java.lang.Integer.parseInt(Integer.java:615) ~[?:1.8.0_60]
        at com.james137137.LimitedWorldEdit.hooks.WorldGuardAPI.canSet(WorldGuardAPI.java:90) ~[?:?]
        at com.james137137.LimitedWorldEdit.hooks.WorldGuardAPI.CanBuildHere(WorldGuardAPI.java:64) ~[?:?]
        at com.james137137.LimitedWorldEdit.LimitedWorldEdit.CanWorldEdit(LimitedWorldEdit.java:126) ~[?:?]
        at com.james137137.LimitedWorldEdit.LimitedWorldEditListener.onPlayerCommand(LimitedWorldEditListener.java:38) ~[?:?]
        at sun.reflect.GeneratedMethodAccessor263.invoke(Unknown Source) ~[?:?]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_60]
        at java.lang.reflect.Method.invoke(Method.java:497) ~[?:1.8.0_60]
        at com.massivecraft.massivelag.inject.event.MassiveLagEventExecutor.execute(MassiveLagEventExecutor.java:67) ~[?:?]
        ... 16 more