Crash world Monster Pack

[Luis01010]

Hi, this is the first time I post here and I don't know if this is where I have to ask, sorry if it's the wrong place.

My problem is that my world crashes when is loading, it suddenly says "shutting down internal server" and the game crashes. The world is one I started on Direwolf20 and later moved it to the Monster's folder, I don't know if this could be the cause of the crash, but I don't think is an ID problem because the crash happened when I was exploring new terrain.
I tried to open the world again and it loaded once, but a few seconds later crashed again and it doesn't load anymore.
It would be annoying to have to start a new world so I hope it has a solution. Thanks in advance.

Here is the crash report:

---- Minecraft Crash Report ----
// I blame Dinnerbone.

Time: 9/10/14 17:50
Description: Exception in server tick loop

java.lang.NullPointerException
at net.minecraft.world.gen.structure.StructureStart.func_75068_a(StructureStart.java:47)
at net.minecraft.world.gen.structure.MapGenStructure.func_75051_a(MapGenStructure.java:81)
at net.minecraft.world.gen.ChunkProviderGenerate.func_73153_a(ChunkProviderGenerate.java:533)
at net.minecraft.world.gen.ChunkProviderServer.func_73153_a(ChunkProviderServer.java:258)
at net.minecraft.world.chunk.Chunk.func_76624_a(Chunk.java:1253)
at net.minecraft.world.gen.ChunkProviderServer.func_73158_c(ChunkProviderServer.java:153)
at net.minecraft.server.management.PlayerInstance.<init>(PlayerInstance.java:43)
at net.minecraft.server.management.PlayerManager.func_72690_a(SourceFile:208)
at net.minecraft.server.management.PlayerManager.func_72683_a(SourceFile:240)
at net.minecraft.server.management.ServerConfigurationManager.func_72375_a(ServerConfigurationManager.java:220)
at net.minecraft.server.management.ServerConfigurationManager.func_72377_c(ServerConfigurationManager.java:268)
at net.minecraft.server.management.ServerConfigurationManager.func_72355_a(ServerConfigurationManager.java:136)
at net.minecraft.server.integrated.IntegratedServerListenThread.func_71747_b(IntegratedServerListenThread.java:97)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:691)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:587)
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:129)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:484)
at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:583)

 

[Wagon153]

This has nothing to do with IDs. Your world is dead.

 

[Luis01010]

There is no way to fix it?

 

[Wagon153]

You could try deleting all chunks outside your base with MCEdit.

 

[Luis01010]

Ok I'll try this, thanks

 

[Luis01010]

It doesn't work, the game keeps crashing.

 

[Wagon153]

Last resort is to try and delete your player.dat. If that doesn't work, you 're out of luck. Note: All of your inventory and Thaumcraft research will be lost.

 

[Luis01010]

It didn't work so I'll create a new world. Thanks for the help.

 

[UplayIN]

It's easy to fix!!!!!!
open your world in normal minecraft and then return to ftb.
the chunks you loaded in minecraft will reset but the all other chunks will stay.
sorry for my "bad english"