Chunkgen + RTG?

[Corcustos]

I'm trying to generate a new world with a 42k x 42k area, I'm using the command "/chunkgen 0 0 2630 2630". It successfully adds data for the chunks that were already generated, but when It gets to new chunks, the server crashes. I was wondering if there's a way I can use chunkgen to generate chunks with RTG custom terrain for my server, or if there's something I can do to fix this. I need to generate it before I use pixelmon and sponge so that it generates correctly.

Versions:
chunkgen-1.8.9-1.3.0.jar
RTG-1.8.9-1.0.0-snapshot-2.jar
BiomeTweaker-1.8.9-2.1.206.jar
forge-1.8.9-11.15.1.1902-1.8.9-universal.jar

Crash Message:
net.minecraft.util.ReportedException: Exception generating new chunk at net.minecraft.world.gen.ChunkProviderServer.originalLoadChunk(ChunkProviderServer.java:163) ~[ld.class:?] at net.minecraft.world.gen.ChunkProviderServer.loadChunk(ChunkProviderServer.java:114) ~[ld.class:?] at net.minecraft.world.gen.ChunkProviderServer.func_73158_c(ChunkProviderServer.java:84) ~[ld.class:?] at net.minecraft.world.gen.ChunkProviderServer.func_73154_d(ChunkProviderServer.java:181) ~[ld.class:?] at net.minecraft.world.World.func_72964_e(World.java:287) ~[adm.class:?] at net.minecraft.world.World.func_175726_f(World.java:282) ~[adm.class:?] at net.minecraft.world.World.func_180495_p(World.java:822) ~[adm.class:?] at net.minecraft.world.gen.feature.WorldGenMinable.func_180709_b(WorldGenMinable.java:76) ~[apj.class:?] at com.pixelmonmod.pixelmon.pixelutilities.worldgen.GenericOreGenerator.generate(GenericOreGenerator.java:42) ~[GenericOreGenerator.class:?] at net.minecraftforge.fml.common.registry.GameRegistry.generateWorld(GameRegistry.java:112) ~[GameRegistry.class:?] at net.minecraft.world.gen.ChunkProviderServer.func_73153_a(ChunkProviderServer.java:262) ~[ld.class:?] at net.minecraft.world.chunk.Chunk.func_76624_a(Chunk.java:1082) ~[amy.class:?] at net.minecraft.world.gen.ChunkProviderServer.originalLoadChunk(ChunkProviderServer.java:172) ~[ld.class:?] at net.minecraft.world.gen.ChunkProviderServer.loadChunk(ChunkProviderServer.java:114) ~[ld.class:?] at net.minecraft.world.gen.ChunkProviderServer.func_73158_c(ChunkProviderServer.java:84) ~[ld.class:?] at com.gecgooden.chunkgen.util.Utilities.generateChunk(Utilities.java:49) ~[Utilities.class:?] at com.gecgooden.chunkgen.handlers.TickHandler.onServerTick(TickHandler.java:31) ~[TickHandler.class:?] at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_20_TickHandler_onServerTick_ServerTickEvent.invoke(.dynamic) ~[?:?] at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:49) ~[ASMEventHandler.class:?] at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:140) ~[EventBus.class:?] at net.minecraftforge.fml.common.FMLCommonHandler.onPostServerTick(FMLCommonHandler.java:253) ~[FMLCommonHandler.class:?] at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:649) ~[MinecraftServer.class:?] at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:481) [MinecraftServer.class:?] at java.lang.Thread.run(Thread.java:745) [?:1.8.0_92] Caused by: java.lang.ExceptionInInitializerError at rtg.world.biome.realistic.RealisticBiomeBase.rMapVolcanoes(RealisticBiomeBase.java:399) ~[RealisticBiomeBase.class:?] at rtg.world.biome.realistic.RealisticBiomeBase.generateMapGen(RealisticBiomeBase.java:425) ~[RealisticBiomeBase.class:?] at rtg.world.gen.ChunkProviderRTG.func_73154_d(ChunkProviderRTG.java:278) ~[ChunkProviderRTG.class:?] at net.minecraft.world.gen.ChunkProviderServer.originalLoadChunk(ChunkProviderServer.java:154) ~[ld.class:?] ... 23 more Caused by: java.lang.NullPointerException at rtg.world.gen.feature.WorldGenVolcano.(WorldGenVolcano.java:26) ~[WorldGenVolcano.class:?] at rtg.world.biome.realistic.RealisticBiomeBase.rMapVolcanoes(RealisticBiomeBase.java:399) ~[RealisticBiomeBase.class:?] at rtg.world.biome.realistic.RealisticBiomeBase.generateMapGen(RealisticBiomeBase.java:425) ~[RealisticBiomeBase.class:?] at rtg.world.gen.ChunkProviderRTG.func_73154_d(ChunkProviderRTG.java:278) ~[ChunkProviderRTG.class:?] at net.minecraft.world.gen.ChunkProviderServer.originalLoadChunk(ChunkProviderServer.java:154) ~[ld.class:?]

All help is appreciated. Thanks.