mcMMO API - getXP

I'm so annoyed at this point, omg. I have tried basically everything I know to get this to work, but it just cannot.
So we have this:
https://github.com/mcMMO-Dev/mcMMO/...java/com/gmail/nossr50/api/ExperienceAPI.java

I have imported the mcmmo.jar into my Eclipse project and messed around with syntaxes, but I just can't display the XP of specific skill. It just doesn't work. Either Eclipse rejects my project or the command doesn't work, throwing an internal error. It's my first time using external API, so I'm pretty sure that I'm not aware of the most silly mistake I probably make. So how would you do this?

 

Quasindro
What is the internal error?
(Check the console)

 

Gater12

Code:

org.bukkit.command.CommandException: Unhandled exception executing command 'test' in plugin mcMenu v1.0
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:175) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
at org.bukkit.craftbukkit.v1_7_R1.CraftServer.dispatchCommand(CraftServer.java:683) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
at net.minecraft.server.v1_7_R1.PlayerConnection.handleCommand(PlayerConnection.java:952) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
at net.minecraft.server.v1_7_R1.PlayerConnection.a(PlayerConnection.java:814) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
at com.bergerkiller.bukkit.common.internal.network.CommonPacketHandler$CommonPlayerConnection.a(CommonPacketHandler.java:244) [BKCommonLib-1.57.jar:?]
at net.minecraft.server.v1_7_R1.PacketPlayInChat.a(PacketPlayInChat.java:28) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
at net.minecraft.server.v1_7_R1.PacketPlayInChat.handle(PacketPlayInChat.java:47) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
at net.minecraft.server.v1_7_R1.NetworkManager.a(NetworkManager.java:146) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
at net.minecraft.server.v1_7_R1.ServerConnection.c(SourceFile:134) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
at net.minecraft.server.v1_7_R1.MinecraftServer.u(MinecraftServer.java:655) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
at net.minecraft.server.v1_7_R1.DedicatedServer.u(DedicatedServer.java:250) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
at net.minecraft.server.v1_7_R1.MinecraftServer.t(MinecraftServer.java:545) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java:457) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:617) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
Caused by: java.lang.NoSuchMethodError: com.gmail.nossr50.datatypes.skills.SkillType.getSkillName()Ljava/lang/String;
at pl.heavencraft.mcmenu.mcMenu.onCommand(mcMenu.java:36) ~[?:?]
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-b3020jnks]
... 14 more

That was it when I tried to call the skill's name, so it's a bit more funny.

 

Quasindro
Is mcMMO in your plugins folder?

 

Gater12
Yup.

 

Quasindro Make sure you have added McMMO as a dependency in your plugin.yml

 

xTigerRebornx
I have.

 

Quasindro According to McMMO's source-code, the method actually doesn't exist. Make sure you are building with the same version of McMMO in both your IDE and Server.

 

Quasindro Are you using the same version in eclipse and plugins? It can't find the getSkillName method.

 

xTigerRebornx AdamQpzm
I got that code helplessly from the internet, alright? Don't care about it.

Has anybody ever done this? Will I be a genius if I somehow get it done by myself? By the lack of response, I guess so.

EDIT by Moderator: merged posts, please use the edit button instead of double posting.