Bukkit

What steps will reproduce the problem?
1. place a quarry
2. insert coal
3. coal is consumed but nothing happens

What is the expected output? What do you see instead?

What version of the product are you using?
R: NeXTQuarry v1.7.1 for CB 1.6.2-R0.1

Do you have an error log of what happened?
while the quarry is fueled i get this error every few seconds in the console

6:08:48 AM [WARNING] [NeXTQuarry] Task #10 for NeXTQuarry v1.7.1 generated an exception
java.lang.NoClassDefFoundError: com/massivecraft/factions/entity/UPlayer
at net.autumndusk.nextquarry.support.PS_Factions.mayEditBlock(PS_Factions.java:16)
at net.autumndusk.nextquarry.support.PluginSupport.mayEditBlock(PluginSupport.java:68)
at net.autumndusk.nextquarry.entities.Quarry.buildFrame(Quarry.java:1318)
at net.autumndusk.nextquarry.entities.Quarry.doTick(Quarry.java:587)
at net.autumndusk.nextquarry.main.MainClass$1.run(MainClass.java:109)
at org.bukkit.craftbukkit.v1_6_R2.scheduler.CraftTask.run(CraftTask.java:53)
at org.bukkit.craftbukkit.v1_6_R2.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:345)
at net.minecraft.server.v1_6_R2.MinecraftServer.t(MinecraftServer.java:522)
at net.minecraft.server.v1_6_R2.DedicatedServer.t(DedicatedServer.java:226)
at net.minecraft.server.v1_6_R2.MinecraftServer.s(MinecraftServer.java:486)
at net.minecraft.server.v1_6_R2.MinecraftServer.run(MinecraftServer.java:419)
at net.minecraft.server.v1_6_R2.ThreadServerApplication.run(SourceFile:582)

Please provide any additional information below.

I think the problem might be caused by an outdated version of mcore or factions.

Try to update your factions plugin jar to the latest version: http://dev.bukkit.org/bukkit-plugins/factions/

Most definitely make sure you use the latest version of mcore too when having factions: http://dev.bukkit.org/bukkit-plugins/mcore/ (this is probably the thing that caused your problems)

If you're still having trouble after this, please make sure you are running Java 7.

Please let me know if this worked!