[19:17:06] [Server thread/WARN]: [Builder] Task #104 for Builder v0.9.1 generated an exception
java.lang.NoClassDefFoundError: net/minecraft/server/v1_7_R4/NBTBase
	at net.jrbudda.builder.EmptyBuildBlock.getMat(EmptyBuildBlock.java:19) ~[?:?]
	at net.jrbudda.builder.BuilderSchematic.BuildQueue(BuilderSchematic.java:61) ~[?:?]
	at net.jrbudda.builder.BuilderTrait.StartBuild(BuilderTrait.java:346) ~[?:?]
	at net.jrbudda.builder.BuilderTrait.TryBuild(BuilderTrait.java:288) ~[?:?]
	at net.jrbudda.builder.BuilderTrait$1.run(BuilderTrait.java:139) ~[?:?]
	at org.bukkit.craftbukkit.v1_7_R3.scheduler.CraftTask.run(CraftTask.java:58) ~[spigot-1.7.9-R0.3-SNAPSHOT.jar:git-Spigot-1500]
	at org.bukkit.craftbukkit.v1_7_R3.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:345) [spigot-1.7.9-R0.3-SNAPSHOT.jar:git-Spigot-1500]
	at net.minecraft.server.v1_7_R3.MinecraftServer.v(MinecraftServer.java:635) [spigot-1.7.9-R0.3-SNAPSHOT.jar:git-Spigot-1500]
	at net.minecraft.server.v1_7_R3.DedicatedServer.v(DedicatedServer.java:283) [spigot-1.7.9-R0.3-SNAPSHOT.jar:git-Spigot-1500]
	at net.minecraft.server.v1_7_R3.MinecraftServer.u(MinecraftServer.java:583) [spigot-1.7.9-R0.3-SNAPSHOT.jar:git-Spigot-1500]
	at net.minecraft.server.v1_7_R3.MinecraftServer.run(MinecraftServer.java:489) [spigot-1.7.9-R0.3-SNAPSHOT.jar:git-Spigot-1500]
	at net.minecraft.server.v1_7_R3.ThreadServerApplication.run(SourceFile:628) [spigot-1.7.9-R0.3-SNAPSHOT.jar:git-Spigot-1500]
Caused by: java.lang.ClassNotFoundException: net.minecraft.server.v1_7_R4.NBTBase
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:67) ~[spigot-1.7.9-R0.3-SNAPSHOT.jar:git-Spigot-1500]
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:62) ~[spigot-1.7.9-R0.3-SNAPSHOT.jar:git-Spigot-1500]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_05]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_05]
	... 12 more
[19:17:19] [Server thread/INFO]: [WorldEdit] Using external NmsBlock for this version: CBXNmsBlock_175_5xcompat