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here is the crash report. I'm new to programming so I have no idea what this means. Please help.


Time: 7/13/14 2:43 AM
Description: Exception in server tick loop

java.lang.NullPointerException
at info.satscape.simukraft.common.FolkData.hasLoaded(FolkData.java:169)
at info.satscape.simukraft.common.FolkData.loadAndSpawnFolks(FolkData.java:1670)
at info.satscape.simukraft.common.CommonTickHandler.startingWorld(CommonTickHandler.java:230)
at info.satscape.simukraft.common.CommonTickHandler.onTickInGame(CommonTickHandler.java:113)
at info.satscape.simukraft.common.CommonTickHandler.tickEnd(CommonTickHandler.java:255)
at cpw.mods.fml.common.SingleIntervalHandler.tickEnd(SingleIntervalHandler.java:34)
at cpw.mods.fml.common.FMLCommonHandler.tickEnd(FMLCommonHandler.java:141)
at cpw.mods.fml.common.FMLCommonHandler.onPostServerTick(FMLCommonHandler.java:274)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:622)
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)


A detailed walkthrough of the error, its code path and all known details is as follows:
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-- System Details --
Details:
Minecraft Version: 1.6.4
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.7.0_51, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 211953416 bytes (202 MB) / 379584512 bytes (362 MB) up to 954728448 bytes (910 MB)
JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G
AABB Pool Size: 3098 (173488 bytes; 0 MB) allocated, 3098 (173488 bytes; 0 MB) used
Suspicious classes: FML and Forge are installed
IntCache: cache: 15, tcache: 0, allocated: 3, tallocated: 63
FML: MCP v8.11 FML v6.4.6.884 Minecraft Forge 9.11.0.884 4 mods loaded, 4 mods active
mcp{8.09} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
FML{6.4.6.884} [Forge Mod Loader] (minecraftforge-9.11.0.884.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Forge{9.11.0.884} [Minecraft Forge] (minecraftforge-9.11.0.884.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
satscapesimukraft{0.12.1 Beta} [Sim-U-Kraft] (Sim-U-Kraft-0.12.1.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Profiler Position: N/A (disabled)
Vec3 Pool Size: 884 (49504 bytes; 0 MB) allocated, 884 (49504 bytes; 0 MB) used
Player Count: 1 / 8; [EntityPlayerMP['MetalBlitz23'/287, l='explore', x=219.40, y=64.00, z=275.76]]
Type: Integrated Server (map_client.txt)
Is Modded: Definitely; Client brand changed to 'fml,forge'