:09:40] [Server thread/ERROR]: Could not pass event InventoryClickEvent to HyperMerchant v1.3b
org.bukkit.event.EventException
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:427) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.1-b2969jnks]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.1-b2969jnks]
at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:481) [craftbukkit.jar:git-Bukkit-1.7.2-R0.1-b2969jnks]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:466) [craftbukkit.jar:git-Bukkit-1.7.2-R0.1-b2969jnks]
at net.minecraft.server.v1_7_R1.PlayerConnection.a(PlayerConnection.java:1348) [craftbukkit.jar:git-Bukkit-1.7.2-R0.1-b2969jnks]
at net.minecraft.server.v1_7_R1.PacketPlayInWindowClick.a(SourceFile:32) [craftbukkit.jar:git-Bukkit-1.7.2-R0.1-b2969jnks]
at net.minecraft.server.v1_7_R1.PacketPlayInWindowClick.handle(SourceFile:10) [craftbukkit.jar:git-Bukkit-1.7.2-R0.1-b2969jnks]
at net.minecraft.server.v1_7_R1.NetworkManager.a(NetworkManager.java:146) [craftbukkit.jar:git-Bukkit-1.7.2-R0.1-b2969jnks]
at net.minecraft.server.v1_7_R1.ServerConnection.c(SourceFile:134) [craftbukkit.jar:git-Bukkit-1.7.2-R0.1-b2969jnks]
at net.minecraft.server.v1_7_R1.MinecraftServer.u(MinecraftServer.java:655) [craftbukkit.jar:git-Bukkit-1.7.2-R0.1-b2969jnks]
at net.minecraft.server.v1_7_R1.DedicatedServer.u(DedicatedServer.java:250) [craftbukkit.jar:git-Bukkit-1.7.2-R0.1-b2969jnks]
at net.minecraft.server.v1_7_R1.MinecraftServer.t(MinecraftServer.java:545) [craftbukkit.jar:git-Bukkit-1.7.2-R0.1-b2969jnks]
at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java:457) [craftbukkit.jar:git-Bukkit-1.7.2-R0.1-b2969jnks]
at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:617) [craftbukkit.jar:git-Bukkit-1.7.2-R0.1-b2969jnks]
Caused by: java.lang.NullPointerException
at grokswell.hypermerchant.ShopTransactions.Sell(ShopTransactions.java:68) ~[?:?]
at grokswell.hypermerchant.ShopMenu.onInventoryClickOrCreative(ShopMenu.java:313) ~[?:?]
at grokswell.hypermerchant.ShopMenu.onInventoryClick(ShopMenu.java:249) ~[?:?]
at sun.reflect.GeneratedMethodAccessor955.invoke(Unknown Source) ~[?:?]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0_01]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.7.0_01]
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:425) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.1-b2969jnks]
... 13 more
[22:09:40] [Server thread/WARN]: [ParticleEffect] Failed to send a particle packet to ThePengu!