WorkingWithRiotShields

I'm playing singleplayer, creative and a little bit after the world loads, I get an error that looks like this: [Railcraft] Loaded 0 saved Anchors setupTexture: "/mob/cow.png", id: 106 setupTexture: "/mob/chicken.png", id: 107 [Railcraft] Loaded 0 saved Anchors setupTexture: "/mob/zombie.png", id: 108 setupTexture: "/mob/skeleton.png", id: 109 setupTexture: "/particles.png", id: 110 setupTexture: "/item/largechest.png", id: 111 setupTexture: "/gui/allitems.png", id: 112 setupTexture: "/codechicken/nei/nei_sprites.png", id: 113 setupTexture: "/mob/villager_golem.png", id: 114 setupTexture: "/mob/slime.png", id: 115 setupTexture: "/mob/silverfish.png", id: 116 setupTexture: "/mob/fire.png", id: 117 setupTexture: "/mob/lava.png", id: 118 setupTexture: "/mob/wolf.png", id: 119 setupTexture: "/mob/ozelot.png", id: 120 setupTexture: "/mob/villager/farmer.png", id: 121 setupTexture: "/mob/creeper.png", id: 122 setupTexture: "/mob/spider.png", id: 123 setupTexture: "/mob/spider_eyes.png", id: 124 setupTexture: "/mob/ghast.png", id: 125 setupTexture: "/mob/pigzombie.png", id: 126 setupTexture: "/mob/cavespider.png", id: 127 setupTexture: "/mob/redcow.png", id: 128 setupTexture: "/item/chest.png", id: 129 setupTexture: "/ee/art/sprites/condenser.png", id: 130 setupTexture: "/gui/crafting.png", id: 131 setupTexture: "/mob/sheep.png", id: 132 setupTexture: "/mob/sheep_fur.png", id: 133 Field not found: nn.captureDrops Field not found: nn.capturedDrops java.lang.NullPointerException at acq.a(EntityLiving.java:1094) at acq.a(EntityLiving.java:887) at bc.a(SourceFile:124) at yo.c(SourceFile:251) at ax.e(SourceFile:77) at nb.a(SourceFile:55) at acq.s_(EntityLiving.java:1605) at acq.e(EntityLiving.java:1452) at ajr.e(SourceFile:39) at bc.e(SourceFile:30) at yo.e(SourceFile:143) at acq.J_(EntityLiving.java:687) at yo.J_(SourceFile:155) at xd.a(World.java:2196) at xd.f(World.java:2167) at xd.n(World.java:2049) at net.minecraft.client.Minecraft.k(Minecraft.java:1871) at net.minecraft.client.Minecraft.x(Minecraft.java:825) at net.minecraft.client.Minecraft.run(Minecraft.java:753) at java.lang.Thread.run(Unknown Source) 2013-06-30 18:06:26 [sEVERE] A critical error has occurred. java.lang.NullPointerException at acq.a(EntityLiving.java:1094) at acq.a(EntityLiving.java:887) at bc.a(SourceFile:124) at yo.c(SourceFile:251) at ax.e(SourceFile:77) at nb.a(SourceFile:55) at acq.s_(EntityLiving.java:1605) at acq.e(EntityLiving.java:1452) at ajr.e(SourceFile:39) at bc.e(SourceFile:30) at yo.e(SourceFile:143) at acq.J_(EntityLiving.java:687) at yo.J_(SourceFile:155) at xd.a(World.java:2196) at xd.f(World.java:2167) at xd.n(World.java:2049) at net.minecraft.client.Minecraft.k(Minecraft.java:1871) at net.minecraft.client.Minecraft.x(Minecraft.java:825) at net.minecraft.client.Minecraft.run(Minecraft.java:753) at java.lang.Thread.run(Unknown Source) 2013-06-30 18:06:26 [sEVERE] 41 mods loaded Optifine OptiFine_1.2.5_HD_S_C6 Minecraft Forge 3.3.8.164 FML v2.2.106.176 Forge Mod Loader version 2.2.106.176 for Minecraft 1.2.5 mod_CodeChickenCore : Available (modpack.jar) mod_MinecraftForge : Available (modpack.jar) mod_NotEnoughItems : Available (modpack.jar) mod_ReiMinimap : Available ([1.2.5]ReiMinimap_v3.2_04.zip) mod_IC2 : Available (industrialcraft-2-client_1.97.jar) mod_IC2AdvancedMachines : Available (AdvancedMachines_4.0_client.zip) mod_BuildCraftCore : Available (buildcraft-client-A-core-2.2.14.zip) mod_BuildCraftBuilders : Available (buildcraft-client-B-builders-2.2.14.zip) mod_BuildCraftEnergy : Available (buildcraft-client-B-energy-2.2.14.zip) mod_BuildCraftFactory : Available (buildcraft-client-B-factory-2.2.14.zip) mod_BuildCraftTransport : Available (buildcraft-client-B-transport-2.2.14.zip) mod_AdditionalPipes : Available (buildcraft-client-DA-additionalpipes-2.1.3.zip) mod_ComputerCraft : Available (ComputerCraft) mod_RedPowerMachine : Available (RedPowerMachine-2.0pr5b2.zip) mod_ccSensors : Available (ccSensors-client-MC125-B017pr1.zip) mod_CCTurtle : Available (ComputerCraft) mod_EE : Available (EE2ClientV1.4.6.5.jar) mod_EnderStorage : Available (EnderStorage-Client 1.1.3.zip) mod_IC2NuclearControl : Available (IC2NuclearControl_client_v1.1.10b.zip) mod_ImmibisCore : Available (immibis-core_49.1.1_for_1.2.5-client.jar) mod_InvTweaks : Available (InvTweaks-1.41b-1.2.4.zip) mod_MAtmos_forModLoader : Available (MAtmos_packaged.zip) mod_ModularForceFieldSystem : Available (mffs_rev7_for_1.2.5-client.zip) mod_IC2_ChargingBench : Available (mod_chargingbench-client-1.95b-1.2.5-r1.zip) mod_CompactSolars : Available (mod_compactsolars-client-2.3.2.10.zip) mod_IronChest : Available (mod_ironchests-client-3.8.0.40.zip) mod_RedPowerCore : Available (RedPowerCore-2.0pr5b2.zip) mod_NetherOres : Available (NetherOres_Client_1.2.1.zip) mod_PowerConverters : Available (PowerConverters_Client_1.3.4.zip) mod_Railcraft : Available (Railcraft_Client_5.3.3.zip) mod_RedPowerControl : Available (RedPowerControl-2.0pr5b2.zip) mod_RedPowerLighting : Available (RedPowerLighting-2.0pr5b2.zip) mod_RedPowerLogic : Available (RedPowerLogic-2.0pr5b2.zip) mod_RedPowerWiring : Available (RedPowerWiring-2.0pr5b2.zip) mod_RedPowerWorld : Available (RedPowerWorld-2.0pr5b2.zip) mod_TubeStuff : Available (tubestuff_49.1.2_for_1.2.5-client.jar) Balkon's WeaponMod : Available (WeaponMod.zip) mod_WirelessRedstoneCore : Available (WR-CBE Core-Client 1.2.2.3.zip) mod_WirelessRedstoneAddons : Available (WR-CBE Addons-Client 1.2.2.3.zip) mod_WirelessRedstoneRedPower : Available (WR-CBE RedPower-Client 1.2.2.1.zip) mod_ImmiChunkLoaders : Available (zdimensional-anchor_rev3.2_for_1.2.5-client.jar) If you have found another thread where this is explained, please link me to it, as well. Thank you. Also, this does not happen in survival multiplayer.