[12:14:59 ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'clerk' in plugin HyperMerchant v1.52-dev
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[craftbukkit-dev.jar:git-Bukkit-1.7.2-R0.3-56-g3779cff-b3072jnks]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:180) ~[craftbukkit-dev.jar:git-Bukkit-1.7.2-R0.3-56-g3779cff-b3072jnks]
        at org.bukkit.craftbukkit.v1_7_R3.CraftServer.dispatchCommand(CraftServer.java:703) ~[craftbukkit-dev.jar:git-Bukkit-1.7.2-R0.3-56-g3779cff-b3072jnks]
        at net.minecraft.server.v1_7_R3.PlayerConnection.handleCommand(PlayerConnection.java:955) [craftbukkit-dev.jar:git-Bukkit-1.7.2-R0.3-56-g3779cff-b3072jnks]
        at net.minecraft.server.v1_7_R3.PlayerConnection.a(PlayerConnection.java:817) [craftbukkit-dev.jar:git-Bukkit-1.7.2-R0.3-56-g3779cff-b3072jnks]
        at net.minecraft.server.v1_7_R3.PacketPlayInChat.a(PacketPlayInChat.java:28) [craftbukkit-dev.jar:git-Bukkit-1.7.2-R0.3-56-g3779cff-b3072jnks]
        at net.minecraft.server.v1_7_R3.PacketPlayInChat.handle(PacketPlayInChat.java:47) [craftbukkit-dev.jar:git-Bukkit-1.7.2-R0.3-56-g3779cff-b3072jnks]
        at net.minecraft.server.v1_7_R3.NetworkManager.a(NetworkManager.java:157) [craftbukkit-dev.jar:git-Bukkit-1.7.2-R0.3-56-g3779cff-b3072jnks]
        at net.minecraft.server.v1_7_R3.ServerConnection.c(SourceFile:134) [craftbukkit-dev.jar:git-Bukkit-1.7.2-R0.3-56-g3779cff-b3072jnks]
        at net.minecraft.server.v1_7_R3.MinecraftServer.v(MinecraftServer.java:667) [craftbukkit-dev.jar:git-Bukkit-1.7.2-R0.3-56-g3779cff-b3072jnks]
        at net.minecraft.server.v1_7_R3.DedicatedServer.v(DedicatedServer.java:260) [craftbukkit-dev.jar:git-Bukkit-1.7.2-R0.3-56-g3779cff-b3072jnks]
        at net.minecraft.server.v1_7_R3.MinecraftServer.u(MinecraftServer.java:558) [craftbukkit-dev.jar:git-Bukkit-1.7.2-R0.3-56-g3779cff-b3072jnks]
        at net.minecraft.server.v1_7_R3.MinecraftServer.run(MinecraftServer.java:469) [craftbukkit-dev.jar:git-Bukkit-1.7.2-R0.3-56-g3779cff-b3072jnks]
        at net.minecraft.server.v1_7_R3.ThreadServerApplication.run(SourceFile:628) [craftbukkit-dev.jar:git-Bukkit-1.7.2-R0.3-56-g3779cff-b3072jnks]
Caused by: java.lang.NullPointerException
        at grokswell.hypermerchant.ClerkCommand.<init>(ClerkCommand.java:150) ~[?:?]
        at grokswell.hypermerchant.HyperMerchantPlugin.onCommand(HyperMerchantPlugin.java:192) ~[?:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[craftbukkit-dev.jar:git-Bukkit-1.7.2-R0.3-56-g3779cff-b3072jnks]
        ... 13 more