[08:40:21] [Server thread/INFO]: Starting minecraft server version 1.7.10
[08:41:03] [Server thread/INFO]: Loading properties
[08:41:03] [Server thread/INFO]: Default game type: SURVIVAL
[08:41:03] [Server thread/INFO]: Generating keypair
[08:41:03] [Server thread/INFO]: Starting Minecraft server on *:25540
[08:41:31] [Server thread/INFO]: Preparing level "world"
[08:41:32] [Thread-21/INFO]: Starting backup of dim -7...
[08:41:33] [Server thread/ERROR]: Encountered an unexpected exception
java.lang.IllegalArgumentException: Multiple entries with same key: [-393, 0]=[net.minecraftforge.common.ForgeChunkManager$Ticket@702cf58f] and [0,-393,0]=[net.minecraftforge.common.ForgeChunkManager$Ticket@34f51fd]
	at com.google.common.collect.ImmutableMap.checkNoConflict(ImmutableMap.java:150) ~[guava-17.0.jar:?]
	at com.google.common.collect.RegularImmutableMap.checkNoConflictInBucket(RegularImmutableMap.java:104) ~[guava-17.0.jar:?]
	at com.google.common.collect.RegularImmutableMap.<init>(RegularImmutableMap.java:70) ~[guava-17.0.jar:?]
	at com.google.common.collect.ImmutableMap$Builder.build(ImmutableMap.java:254) ~[guava-17.0.jar:?]
	at com.google.common.collect.ImmutableSetMultimap.copyOf(ImmutableSetMultimap.java:333) ~[guava-17.0.jar:?]
	at com.google.common.collect.ImmutableSetMultimap.access$000(ImmutableSetMultimap.java:65) ~[guava-17.0.jar:?]
	at com.google.common.collect.ImmutableSetMultimap$Builder.build(ImmutableSetMultimap.java:279) ~[guava-17.0.jar:?]
	at net.minecraftforge.common.ForgeChunkManager.forceChunk(ForgeChunkManager.java:743) ~[ForgeChunkManager.class:?]
	at mods.railcraft.common.blocks.machine.alpha.TileAnchorWorld.forceChunkLoading(TileAnchorWorld.java:391) ~[TileAnchorWorld.class:?]
	at mods.railcraft.common.util.misc.ChunkManager.ticketsLoaded(ChunkManager.java:174) ~[ChunkManager.class:?]
	at net.minecraftforge.common.ForgeChunkManager.loadWorld(ForgeChunkManager.java:523) ~[ForgeChunkManager.class:?]
	at net.minecraftforge.common.ForgeInternalHandler.onDimensionLoad(ForgeInternalHandler.java:64) ~[ForgeInternalHandler.class:?]
	at cpw.mods.fml.common.eventhandler.ASMEventHandler_15_ForgeInternalHandler_onDimensionLoad_Load.invoke(.dynamic) ~[?:?]
	at cpw.mods.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:54) ~[ASMEventHandler.class:?]
	at cpw.mods.fml.common.eventhandler.EventBus.post(EventBus.java:140) ~[EventBus.class:?]
	at net.minecraft.server.MinecraftServer.func_71247_a(MinecraftServer.java:230) ~[MinecraftServer.class:?]
	at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:258) ~[lt.class:?]
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:387) [MinecraftServer.class:?]
	at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685) [li.class:?]
[08:41:33] [Server thread/ERROR]: This crash report has been saved to: /home/AMP/.ampdata/instances/InfinityExpert/Minecraft/./crash-reports/crash-2016-03-03_08.41.33-server.txt