why does hexxit keep crashing

[redspy321]

hexxit keeps crashing when ive already (at least i think) got rid of the mapwriter file so if anyone can help please respond with a solution

---- Minecraft Crash Report ----
// I let you down. Sorry

Time: 4/11/15 11:27 PM
Description: Ticking memory connection

java.lang.NullPointerException
    at atomicstryker.ruins.common.RuinTemplate.isAcceptable(RuinTemplate.java:116)
    at atomicstryker.ruins.common.RuinGenerator.findSuitableY(RuinGenerator.java:218)
    at atomicstryker.ruins.common.RuinGenerator.createBuilding(RuinGenerator.java:107)
    at atomicstryker.ruins.common.RuinGenerator.generateNether(RuinGenerator.java:53)
    at atomicstryker.ruins.common.RuinsMod.generateNether(RuinsMod.java:113)
    at atomicstryker.ruins.common.RuinsMod.access$100(RuinsMod.java:37)
    at atomicstryker.ruins.common.RuinsMod$RuinsWorldGenerator.generate(RuinsMod.java:93)
    at cpw.mods.fml.common.registry.GameRegistry.generateWorld(GameRegistry.java:102)
    at net.minecraft.world.gen.ChunkProviderServer.func_73153_a(ChunkProviderServer.java:259)
    at net.minecraft.world.chunk.Chunk.func_76624_a(Chunk.java:1249)
    at net.minecraft.world.gen.ChunkProviderServer.func_73158_c(ChunkProviderServer.java:153)
    at net.minecraft.server.management.PlayerInstance.<init>(PlayerInstance.java:36)
    at net.minecraft.server.management.PlayerManager.func_72690_a(SourceFile:172)
    at net.minecraft.server.management.PlayerManager.func_72685_d(SourceFile:300)
    at net.minecraft.server.management.ServerConfigurationManager.func_72358_d(ServerConfigurationManager.java:276)
    at net.minecraft.network.NetServerHandler.func_72498_a(NetServerHandler.java:408)
    at net.minecraft.network.packet.Packet10Flying.func_73279_a(SourceFile:136)
    at net.minecraft.network.MemoryConnection.func_74428_b(MemoryConnection.java:89)
    at net.minecraft.network.NetServerHandler.func_72570_d(NetServerHandler.java:134)
    at net.minecraft.network.NetworkListenThread.func_71747_b(NetworkListenThread.java:53)
    at net.minecraft.server.integrated.IntegratedServerListenThread.func_71747_b(IntegratedServerListenThread.java:111)
    at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:677)
    at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:573)
    at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:127)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:470)
    at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:573)

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- System Details --
Details:
    Minecraft Version: 1.5.2
    Operating System: Windows 7 (amd64) version 6.1
    Java Version: 1.8.0_40, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 527178736 bytes (502 MB) / 890241024 bytes (849 MB) up to 1908932608 bytes (1820 MB)
    JVM Flags: 3 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx2048m -XX:MaxPermSize=256m
    AABB Pool Size: 2655 (148680 bytes; 0 MB) allocated, 1828 (102368 bytes; 0 MB) used
    Suspicious classes: FML and Forge are installed
    IntCache: cache: 0, tcache: 0, allocated: 1, tallocated: 63
    FML: MCP v7.51 FML v5.2.23.737 Minecraft Forge 7.8.1.737 67 mods loaded, 67 mods active
    mcp{7.51} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    FML{5.2.23.737} [Forge Mod Loader] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    Forge{7.8.1.737} [Minecraft Forge] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    CodeChickenCore{0.8.7.3} [CodeChicken Core] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    CoFHFramework{1.5.2.5} [CoFH Framework] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    ImmibisMicroblocks{55.0.7} [Immibis's Microblocks] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    NotEnoughItems{1.5.2.28} [Not Enough Items] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    mod_bspkrsCore{v2.09(1.5.2)} [bspkrsCore] ([1.5.2]bspkrsCorev2.09.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    TreeCapitator{Forge 1.5.2.r14} [TreeCapitator] ([1.5.2]TreeCapitator.Forge.1.5.2.r14.Uni.CoreMod.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    CoFHCore{1.5.2.5} [CoFHCore] (CoFHCore-1.5.2.5.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    CoFHWorld{1.5.2.5} [CoFHWorld] (CoFHCore-1.5.2.5.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    CustomLAN{2.2} [Custom LAN Mod] (CustomPortForge.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    ImmibisMicroblocksInstallCheck{55.0.7} [Immibis's Microblocks (Checks for incorrect installation, ignore this)] (immibis-microblocks-55.0.7.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    DamageIndicatorsMod{2.7.0.1} [Damage Indicators] (1.5.2 DamageIndicators v2.7.0.1.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    AsgardShield_Core{2.0.4} [AsgardShield] (1.5.2AsgardShield_Core_2.0.4Forge.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    ASAddon_Hallowed{2.0.0} [AS Addon- Hallowed] (1.5.2ASAddonHallowed_v2.0.0Forge.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    HarkenScythe_Core{2.1.6} [HarkenScythe] (1.5.2HarkenScythe_v2.1.6Forge.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    ASAddon_HarkenScythe{2.0.0} [AS Addon- HarkenScythe] (1.5.2ASAddonHarkenScythe_v2.0.0Forge.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    ASAddon_NetherEnder{2.0.0} [AS Addon- Nether-Ender] (1.5.2ASAddonNetherEnder_v2.0.0Forge.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    ASAddon_ColorAPI{1.0.0} [ASAddon_ColorAPI] (1.5.2AsgardShield_Core_2.0.4Forge.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    BetterStorage{0.6.2.23-hotfix2} [BetterStorage] ([1.5.2]BetterStorage_0.6.2.23-hotfix2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    mod_ArmorBarMod{0.7.1} [Armor Bar Mod] (ArmorBarv0.7.1.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    Artifice{1.5.2R1.1.2} [Artifice] (Artifice-1.1.2-182.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    ArtificeCompat|Chisel{1.5.2R1.1.2} [Artifice Compat: Chisel] (Artifice-1.1.2-182.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    ArtificeCompat|EE3{1.5.2R1.1.2} [Artifice Compat: EE3] (Artifice-1.1.2-182.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    ArtificeCompat|Forestry{1.5.2R1.1.2} [Artifice Compat: Forestry] (Artifice-1.1.2-182.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    ArtificeCompat|MFR{1.5.2R1.1.2} [Artifice Compat: MFR] (Artifice-1.1.2-182.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    ArtificeCompat|Railcraft{1.5.2R1.1.2} [Artifice Compat: Railcraft] (Artifice-1.1.2-182.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    ArtificeCompat|Vanilla{1.5.2R1.1.2} [Artifice Compat: Vanilla] (Artifice-1.1.2-182.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    Backpack{1.12.13} [Backpack] (backpack-1.12.13-1.5.2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    mod_BackTools{1.5.2v1} [mod_BackTools] (BackTools1.5.2v1.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    BattleTowers{1.3.4} [Battle Towers] (BattleTowers_1.5.2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    BetterDungeons{1.8} [Better dungeons] (BetterDungeons.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    BiblioCraft{1.3.3} [BiblioCraft] (BiblioCraft[v1.3.3].zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    mod_BuffBarMod{0.7.1} [Buff Bar Mod] (BuffBarv0.7.1.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    ChestTransporter{1.1.6} [Chest Transporter] (chestTransporter_1.1.6_Universal.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    DimDoors{1.5.2R1.4.1RC1} [Dimensional Doors] (DimensionalDoors-1.5.2R1.4.1RC1-194.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    eplus{1.15.4} [Enchanting Plus] (EnchantingPlus-1.15.4.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    ExtrabiomesXL{3.13.4} [ExtrabiomesXL] (ExtrabiomesXL-universal-1.5.2-3.13.4.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    hexxitgear{1.5.2R1.0} [Hexxit Gear] (HexxitGear-1.0-23.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    ImmibisCore{55.1.6} [Immibis Core] (immibis-core-55.1.6.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    InfernalMobs{1.3.1} [Infernal Mobs] (InfernalMobs_1.5.2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    inventorytweaks{1.54b} [Inventory Tweaks] (InventoryTweaks-1.54b.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    Meteors{2.10.2} [Falling Meteors] (Meteors Mod V2.10.2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    More Bows{1.5_v1} [More Bows mod] (More bows 1.5.2_2 Forge.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    Natura{2.1.5} [Natura] (Natura_1.5.2_2.1.5.1.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    Natura|CompatMineFactoryReloaded{0.1} [Natura compat: MFR] (Natura_1.5.2_2.1.5.1.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    NEIPlugins{1.0.9.3} [NEI Plugins] (NEIPlugins-1.0.9.3.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    LegendGear{1.5.2} [LegendGear] (NMcCoy-LegendGear-1.5.2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    ObsidiPlates{1.5.0} [Obsidian Pressure Plates] (obsidiplates-1.5.2-universal-1.5.0.13.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    OffLawn{1.0} [offLawn] (OffLawn-1.5.1.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    ProjectZulu|Core{1.0.3.8} [Project Zulu Core] (ProjectZuluCompletev1.0.3.8.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    ProjectZulu|Blocks{1.0.3.8} [Project Zulu Block and Items] (ProjectZuluCompletev1.0.3.8.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    ProjectZulu|Dungeon{1.0.3.8} [Project Zulu Mobs] (ProjectZuluCompletev1.0.3.8.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    ProjectZulu|Mobs{1.0.3.8} [Project Zulu Mobs] (ProjectZuluCompletev1.0.3.8.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    ProjectZulu|World{1.0.3.8} [Project Zulu World] (ProjectZuluCompletev1.0.3.8.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    QuantumCraft{1.01} [qCraft] (qCraft1.01.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    xreliquary{1.5.2} [Xeno's Reliquary] (Reliquary1.0.6d.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    rftl{1.0} [RottenFleshToLeather] (RottenFleshToLeather-1.5.1.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    AS_Ruins{10.3} [Ruins Spawning System] (Ruins_1.5.2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    secretroomsmod{4.6.0} [SecretRoomsMod] (SecretRoomsMod-universal-4.6.0.283.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    SoulShards{1.0.16} [Soul Shards] (SoulShards-1.0.36-universal-srg.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    TConstruct{1.5.2_1.4.3d7} [Tinkers' Construct] (TConstruct_1.5.2_1.4.3.final.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    TConstruct|CompatMineFactoryReloaded{0.1} [TConstruct Compat: MFR] (TConstruct_1.5.2_1.4.3.final.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    TwilightForest{1.18.1} [The Twilight Forest] (twilightforest-1.18.1.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    WildCaves3{0.4.2} [Wild Caves 3] (WildCaves3-0.4.2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    chococraft{2.8.8} [Torojima's ChocoCraft] (zzzChococraft_2.8.8.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
    Profiler Position: N/A (disabled)
    Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
    Player Count: 1 / 8; [EntityPlayerMP['redspy321'/362, l='New World', x=384.17, y=53.00, z=-141.59]]
    Type: Integrated Server (map_client.txt)
    Is Modded: Definitely; Client brand changed to 'fml,forge'