at java.util.ArrayList.addAll(Unknown Source)
at biomesoplenty.common.world.layer.GenLayerBiomeBOP.<init>(GenLayerBiomeBOP.java:34)
at biomesoplenty.common.world.WorldTypeBOP.getBiomeLayer(WorldTypeBOP.java:25)
at net.minecraft.world.gen.layer.GenLayer.func_75901_a(GenLayer.java:58)
at net.minecraft.world.biome.WorldChunkManager.<init>(WorldChunkManager.java:40)
at net.minecraft.world.chunk.storage.AnvilSaveConverter.func_75805_a(SourceFile:129)
at net.minecraft.server.MinecraftServer.func_71237_c(MinecraftServer.java:162)
at net.minecraft.server.integrated.IntegratedServer.func_71247_a(IntegratedServer.java:59)
at net.minecraft.server.integrated.IntegratedServer.func_71197_b(IntegratedServer.java:92)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:387)
at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685)
How does one fix this problem any ideas all ideas will be greatly appricated tried all 1.7.10 versions of biome's o plenty no different it crashed like when trying to load up a biome's o plenty world