Minecraft Forums

For some reason, my Minecraft starts up fine the first time I start it after adding these mods without any saves or anything, but if I close out of the game and try to start it up again, this error shows up...

---- Minecraft Crash Report ----
// Shall we play a game?

Time: 4/10/13 5:48 AM
Description: Failed to start game

java.lang.NullPointerException
at com.eloraam.redpower.RedPowerControl.setupBlocks(RedPowerControl.java:117)
at com.eloraam.redpower.RedPowerControl.load(RedPowerControl.java:50)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at cpw.mods.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:487)
at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:69)
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:317)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:300)
at com.google.common.eventbus.EventBus.post(EventBus.java:268)
at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:153)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:69)
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:317)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:300)
at com.google.common.eventbus.EventBus.post(EventBus.java:268)
at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:86)
at cpw.mods.fml.common.Loader.initializeMods(Loader.java:676)
at cpw.mods.fml.client.FMLClientHandler.finishMinecraftLoading(FMLClientHandler.java:207)
at net.minecraft.client.Minecraft.a(Minecraft.java:458)
at asq.a(SourceFile:56)
at net.minecraft.client.Minecraft.run(Minecraft.java:746)
at java.lang.Thread.run(Unknown Source)


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

-- System Details --
Details:
Minecraft Version: 1.4.7
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.7.0_17, Oracle Corporation
Java VM Version: Java HotSpot™ 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 286828328 bytes (273 MB) / 436600832 bytes (416 MB) up to 954466304 bytes (910 MB)
JVM Flags: 1 total; -Xmx1024m
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Suspicious classes: FML and Forge are installed
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP v7.26a FML v4.7.35.556 Minecraft Forge 6.6.2.534 51 mods loaded, 51 mods active
mcp [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized
FML [Forge Mod Loader] (coremods) Unloaded->Constructed->Pre-initialized->Initialized
Forge [Minecraft Forge] (coremods) Unloaded->Constructed->Pre-initialized->Initialized
CodeChickenCore [CodeChicken Core] (coremods) Unloaded->Constructed->Pre-initialized->Initialized
PowerCrystalsCore [PowerCrystals Core] (coremods) Unloaded->Constructed->Pre-initialized->Initialized
GuiAPI [GuiAPI] (GuiAPI-0.15.2-1.4.6.jar) Unloaded->Constructed->Pre-initialized->Initialized
mod_ReiMinimap [mod_ReiMinimap] ([1.4.7]ReiMinimap_v3.2_06.zip) Unloaded->Constructed->Pre-initialized->Initialized
BuildCraft|Core [BuildCraft] (buildcraft-A-3.4.3.jar) Unloaded->Constructed->Pre-initialized->Initialized
BuildCraft|Builders [BC Builders] (buildcraft-A-3.4.3.jar) Unloaded->Constructed->Pre-initialized->Initialized
BuildCraft|Energy [BC Energy] (buildcraft-A-3.4.3.jar) Unloaded->Constructed->Pre-initialized->Initialized
BuildCraft|Factory [BC Factory] (buildcraft-A-3.4.3.jar) Unloaded->Constructed->Pre-initialized->Initialized
BuildCraft|Transport [BC Transport] (buildcraft-A-3.4.3.jar) Unloaded->Constructed->Pre-initialized->Initialized
BuildCraft|Silicon [BC Silicon] (buildcraft-A-3.4.3.jar) Unloaded->Constructed->Pre-initialized->Initialized
CoFHCore [CoFH Core] (CoFHCore-1.4.7.3.zip) Unloaded->Constructed->Pre-initialized->Initialized
ComputerCraft [ComputerCraft] (ComputerCraft1.5.zip) Unloaded->Constructed->Pre-initialized->Initialized
CCTurtle [ComputerCraft Turtles] (ComputerCraft1.5.zip) Unloaded->Constructed->Pre-initialized->Initialized
CustomSpawner [DrZhark's CustomSpawner] (CustomMobSpawner 1.11.zip) Unloaded->Constructed->Pre-initialized->Initialized
MoCreatures [DrZhark's Mo'Creatures Mod] (DrZharks MoCreatures Mod v4.5.1.zip) Unloaded->Constructed->Pre-initialized->Initialized
ExtrabiomesXL [ExtrabiomesXL] (ExtrabiomesXL-universal-1.4.7-3.9.0.jar) Unloaded->Constructed->Pre-initialized->Initialized
factorization [Factorization] (Factorization-0.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized
FlatBedrock [FlatBedrock] (FlatBedrock_1.0.3.zip) Unloaded->Constructed->Pre-initialized->Initialized
Forestry [Forestry for Minecraft] (forestry-A-2.0.0.11.jar) Unloaded->Constructed->Pre-initialized->Initialized
ThermalExpansion [Thermal Expansion] (ThermalExpansion-2.2.2.2.zip) Unloaded->Constructed->Pre-initialized->Initialized
OmniTools [OmniTools] (OmniTools-3.0.4.zip) Unloaded->Constructed->Pre-initialized->Initialized
IC2 [IndustrialCraft 2] (industrialcraft-2_1.115.207-lf.jar) Unloaded->Constructed->Pre-initialized->Initialized
ImmibisCore [Immibis Core] (immibis-core-52.4.6.jar) Unloaded->Constructed->Pre-initialized->Initialized
IronChest [Iron Chest] (ironchest-universal-1.4.7-5.1.0.275.zip) Unloaded->Constructed->Pre-initialized->Initialized
mod_MAtmos [mod_MAtmos] (matmos_packaged.zip) Unloaded->Constructed->Pre-initialized->Initialized
Mystcraft [Mystcraft] (mystcraft-uni-1.4.7-0.10.1.00.zip) Unloaded->Constructed->Pre-initialized->Initialized
ThermalExpansion|Factory [Factory] (ThermalExpansion-2.2.2.2.zip) Unloaded->Constructed->Pre-initialized->Initialized
NetherOres [Nether Ores] (NetherOres-2.0.6-32.jar) Unloaded->Constructed->Pre-initialized->Initialized
Railcraft [Railcraft] (Railcraft_1.4.7-6.17.0.0.jar) Unloaded->Constructed->Pre-initialized->Initialized
RedPowerCore [RedPower] (RedPower-2-Core-1.4.7.zip) Unloaded->Constructed->Pre-initialized->Initialized
RedPowerBase [RP Base] (RedPower-2-Core-1.4.7.zip) Unloaded->Constructed->Pre-initialized->Errored
RedPowerMachine [RP Machine] (RedPower-2-Mechanical-1.4.7.zip) Unloaded->Constructed->Pre-initialized->Errored
RedPowerCompat [RP Compat] (RedPower-2-Compat-1.4.7.zip) Unloaded->Constructed->Pre-initialized->Errored
RedPowerWiring [RP Wiring] (RedPower-2-Digital-1.4.7.zip) Unloaded->Constructed->Pre-initialized->Errored
RedPowerLogic [RP Logic] (RedPower-2-Digital-1.4.7.zip) Unloaded->Constructed->Pre-initialized->Errored
RedPowerLighting [RP Lighting] (RedPower-2-Digital-1.4.7.zip) Unloaded->Constructed->Pre-initialized->Initialized
RedPowerWorld [RP World] (RedPower-2-Mechanical-1.4.7.zip) Unloaded->Constructed->Pre-initialized->Errored
RedPowerControl [RP Control] (RedPower-2-Mechanical-1.4.7.zip) Unloaded->Constructed->Pre-initialized->Errored
Thaumcraft [Thaumcraft] (Thaumcraft3.0.3.zip) Unloaded->Constructed->Pre-initialized->Initialized
ThaumicBees [ThaumicBees] (thaumicbees-1.4.3c.jar) Unloaded->Constructed->Pre-initialized->Initialized
ThermalExpansion|Energy [Energy] (ThermalExpansion-2.2.2.2.zip) Unloaded->Constructed->Pre-initialized->Initialized
ThermalExpansion|Transport [Transport] (ThermalExpansion-2.2.2.2.zip) Unloaded->Constructed->Pre-initialized->Initialized
Tubestuff [Tubestuff] (tubestuff-52.3.2.jar) Unloaded->Constructed->Pre-initialized->Initialized
TwilightForest [The Twilight Forest] (twilightforest-1.15.4.zip) Unloaded->Constructed->Pre-initialized->Initialized
weaponmod [Balkon's WeaponMod] (WeaponMod.zip) Unloaded->Constructed->Pre-initialized->Initialized
WR-CBE|Core [WR-CBE Core] (WR-CBE Core 1.3.3.jar) Unloaded->Constructed->Pre-initialized->Initialized
WR-CBE|Addons [WR-CBE Addons] (WR-CBE Addons 1.3.3.jar) Unloaded->Constructed->Pre-initialized->Initialized
WR-CBE|RedPower [WR-CBE RedPower] (WR-CBE RedPower 1.3.3.jar) Unloaded->Constructed->Pre-initialized->Errored
LWJGL: 2.4.2
OpenGL: ATI Mobility Radeon HD 5870 GL version 3.2.9236, ATI Technologies Inc.
Is Modded: Definitely; Client brand changed to 'forge,fml'
Type: Client (map_client.txt)
Texture Pack: Default
Profiler Position: N/A (disabled)
Vec3 Pool Size: ~~ERROR~~ NullPointerException: null

Okay, I don't know how to edit posts, or if you even can, but it turns out that it's not actually my editing the config files. I re-added the mods, deleted the config folders, then started up the game. It starts up perfectly fine the first time, but if I close out of the game and try to start it up again, this error shows up...

---- Minecraft Crash Report ----
// Shall we play a game?

Time: 4/10/13 5:48 AM
Description: Failed to start game

java.lang.NullPointerException
at com.eloraam.redpower.RedPowerControl.setupBlocks(RedPowerControl.java:117)
at com.eloraam.redpower.RedPowerControl.load(RedPowerControl.java:50)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at cpw.mods.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:487)
at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:69)
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:317)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:300)
at com.google.common.eventbus.EventBus.post(EventBus.java:268)
at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:153)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:69)
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:317)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:300)
at com.google.common.eventbus.EventBus.post(EventBus.java:268)
at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:86)
at cpw.mods.fml.common.Loader.initializeMods(Loader.java:676)
at cpw.mods.fml.client.FMLClientHandler.finishMinecraftLoading(FMLClientHandler.java:207)
at net.minecraft.client.Minecraft.a(Minecraft.java:458)
at asq.a(SourceFile:56)
at net.minecraft.client.Minecraft.run(Minecraft.java:746)
at java.lang.Thread.run(Unknown Source)


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

-- System Details --
Details:
Minecraft Version: 1.4.7
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.7.0_17, Oracle Corporation
Java VM Version: Java HotSpot™ 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 286828328 bytes (273 MB) / 436600832 bytes (416 MB) up to 954466304 bytes (910 MB)
JVM Flags: 1 total; -Xmx1024m
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Suspicious classes: FML and Forge are installed
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP v7.26a FML v4.7.35.556 Minecraft Forge 6.6.2.534 51 mods loaded, 51 mods active
mcp [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized
FML [Forge Mod Loader] (coremods) Unloaded->Constructed->Pre-initialized->Initialized
Forge [Minecraft Forge] (coremods) Unloaded->Constructed->Pre-initialized->Initialized
CodeChickenCore [CodeChicken Core] (coremods) Unloaded->Constructed->Pre-initialized->Initialized
PowerCrystalsCore [PowerCrystals Core] (coremods) Unloaded->Constructed->Pre-initialized->Initialized
GuiAPI [GuiAPI] (GuiAPI-0.15.2-1.4.6.jar) Unloaded->Constructed->Pre-initialized->Initialized
mod_ReiMinimap [mod_ReiMinimap] ([1.4.7]ReiMinimap_v3.2_06.zip) Unloaded->Constructed->Pre-initialized->Initialized
BuildCraft|Core [BuildCraft] (buildcraft-A-3.4.3.jar) Unloaded->Constructed->Pre-initialized->Initialized
BuildCraft|Builders [BC Builders] (buildcraft-A-3.4.3.jar) Unloaded->Constructed->Pre-initialized->Initialized
BuildCraft|Energy [BC Energy] (buildcraft-A-3.4.3.jar) Unloaded->Constructed->Pre-initialized->Initialized
BuildCraft|Factory [BC Factory] (buildcraft-A-3.4.3.jar) Unloaded->Constructed->Pre-initialized->Initialized
BuildCraft|Transport [BC Transport] (buildcraft-A-3.4.3.jar) Unloaded->Constructed->Pre-initialized->Initialized
BuildCraft|Silicon [BC Silicon] (buildcraft-A-3.4.3.jar) Unloaded->Constructed->Pre-initialized->Initialized
CoFHCore [CoFH Core] (CoFHCore-1.4.7.3.zip) Unloaded->Constructed->Pre-initialized->Initialized
ComputerCraft [ComputerCraft] (ComputerCraft1.5.zip) Unloaded->Constructed->Pre-initialized->Initialized
CCTurtle [ComputerCraft Turtles] (ComputerCraft1.5.zip) Unloaded->Constructed->Pre-initialized->Initialized
CustomSpawner [DrZhark's CustomSpawner] (CustomMobSpawner 1.11.zip) Unloaded->Constructed->Pre-initialized->Initialized
MoCreatures [DrZhark's Mo'Creatures Mod] (DrZharks MoCreatures Mod v4.5.1.zip) Unloaded->Constructed->Pre-initialized->Initialized
ExtrabiomesXL [ExtrabiomesXL] (ExtrabiomesXL-universal-1.4.7-3.9.0.jar) Unloaded->Constructed->Pre-initialized->Initialized
factorization [Factorization] (Factorization-0.7.10.jar) Unloaded->Constructed->Pre-initialized->Initialized
FlatBedrock [FlatBedrock] (FlatBedrock_1.0.3.zip) Unloaded->Constructed->Pre-initialized->Initialized
Forestry [Forestry for Minecraft] (forestry-A-2.0.0.11.jar) Unloaded->Constructed->Pre-initialized->Initialized
ThermalExpansion [Thermal Expansion] (ThermalExpansion-2.2.2.2.zip) Unloaded->Constructed->Pre-initialized->Initialized
OmniTools [OmniTools] (OmniTools-3.0.4.zip) Unloaded->Constructed->Pre-initialized->Initialized
IC2 [IndustrialCraft 2] (industrialcraft-2_1.115.207-lf.jar) Unloaded->Constructed->Pre-initialized->Initialized
ImmibisCore [Immibis Core] (immibis-core-52.4.6.jar) Unloaded->Constructed->Pre-initialized->Initialized
IronChest [Iron Chest] (ironchest-universal-1.4.7-5.1.0.275.zip) Unloaded->Constructed->Pre-initialized->Initialized
mod_MAtmos [mod_MAtmos] (matmos_packaged.zip) Unloaded->Constructed->Pre-initialized->Initialized
Mystcraft [Mystcraft] (mystcraft-uni-1.4.7-0.10.1.00.zip) Unloaded->Constructed->Pre-initialized->Initialized
ThermalExpansion|Factory [Factory] (ThermalExpansion-2.2.2.2.zip) Unloaded->Constructed->Pre-initialized->Initialized
NetherOres [Nether Ores] (NetherOres-2.0.6-32.jar) Unloaded->Constructed->Pre-initialized->Initialized
Railcraft [Railcraft] (Railcraft_1.4.7-6.17.0.0.jar) Unloaded->Constructed->Pre-initialized->Initialized
RedPowerCore [RedPower] (RedPower-2-Core-1.4.7.zip) Unloaded->Constructed->Pre-initialized->Initialized
RedPowerBase [RP Base] (RedPower-2-Core-1.4.7.zip) Unloaded->Constructed->Pre-initialized->Errored
RedPowerMachine [RP Machine] (RedPower-2-Mechanical-1.4.7.zip) Unloaded->Constructed->Pre-initialized->Errored
RedPowerCompat [RP Compat] (RedPower-2-Compat-1.4.7.zip) Unloaded->Constructed->Pre-initialized->Errored
RedPowerWiring [RP Wiring] (RedPower-2-Digital-1.4.7.zip) Unloaded->Constructed->Pre-initialized->Errored
RedPowerLogic [RP Logic] (RedPower-2-Digital-1.4.7.zip) Unloaded->Constructed->Pre-initialized->Errored
RedPowerLighting [RP Lighting] (RedPower-2-Digital-1.4.7.zip) Unloaded->Constructed->Pre-initialized->Initialized
RedPowerWorld [RP World] (RedPower-2-Mechanical-1.4.7.zip) Unloaded->Constructed->Pre-initialized->Errored
RedPowerControl [RP Control] (RedPower-2-Mechanical-1.4.7.zip) Unloaded->Constructed->Pre-initialized->Errored
Thaumcraft [Thaumcraft] (Thaumcraft3.0.3.zip) Unloaded->Constructed->Pre-initialized->Initialized
ThaumicBees [ThaumicBees] (thaumicbees-1.4.3c.jar) Unloaded->Constructed->Pre-initialized->Initialized
ThermalExpansion|Energy [Energy] (ThermalExpansion-2.2.2.2.zip) Unloaded->Constructed->Pre-initialized->Initialized
ThermalExpansion|Transport [Transport] (ThermalExpansion-2.2.2.2.zip) Unloaded->Constructed->Pre-initialized->Initialized
Tubestuff [Tubestuff] (tubestuff-52.3.2.jar) Unloaded->Constructed->Pre-initialized->Initialized
TwilightForest [The Twilight Forest] (twilightforest-1.15.4.zip) Unloaded->Constructed->Pre-initialized->Initialized
weaponmod [Balkon's WeaponMod] (WeaponMod.zip) Unloaded->Constructed->Pre-initialized->Initialized
WR-CBE|Core [WR-CBE Core] (WR-CBE Core 1.3.3.jar) Unloaded->Constructed->Pre-initialized->Initialized
WR-CBE|Addons [WR-CBE Addons] (WR-CBE Addons 1.3.3.jar) Unloaded->Constructed->Pre-initialized->Initialized
WR-CBE|RedPower [WR-CBE RedPower] (WR-CBE RedPower 1.3.3.jar) Unloaded->Constructed->Pre-initialized->Errored
LWJGL: 2.4.2
OpenGL: ATI Mobility Radeon HD 5870 GL version 3.2.9236, ATI Technologies Inc.
Is Modded: Definitely; Client brand changed to 'forge,fml'
Type: Client (map_client.txt)
Texture Pack: Default
Profiler Position: N/A (disabled)
Vec3 Pool Size: ~~ERROR~~ NullPointerException: null

Bump.

Try removing the mods. If that doesn't help download 1.5.1

The point is to play with those mods in version 1.4.7. Plenty of people have done it. I just need to know what I'm doing wrong. Something is conflicting, but these mods don't conflict in the FTB pack.

I have this problem too but i'm on Linux if anyone can help my error report is
Operating System: Linux (amd64) version 3.0.0-12-generic
Java Version: 1.6.0_26, Sun Microsystems Inc.
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Sun Microsystems Inc.
Memory: 178977712 bytes (170 MB) / 356319232 bytes (339 MB) up to 1806368768 bytes (1722 MB)
JVM Flags: 0 total;
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Suspicious classes: FML and Forge are installed
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP v7.44 FML v5.1.21.652 Minecraft Forge 7.7.1.652 4 mods loaded, 4 mods active
mcp [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed
FML [Forge Mod Loader] (coremods) Unloaded->Constructed
Forge [Minecraft Forge] (coremods) Unloaded->Constructed
FlansMod [Flan's Mod] (minecraft.jar) Unloaded->Errored
LWJGL: 2.4.2
OpenGL: Gallium 0.4 on AMD RS780 GL version 2.1 Mesa 7.11, X.Org
Is Modded: Definitely; Client brand changed to 'fml,forge'
Type: Client (map_client.txt)
Texture Pack: Default
Profiler Position: N/A (disabled)
Vec3 Pool Size: ~~ERROR~~ NullPointerException: null

cpw.mods.fml.common.LoaderException: java.lang.ClassNotFoundException: co.uk.flansmods.common.FlansMod
at cpw.mods.fml.common.LoadController.transition(LoadController.java:142)
at cpw.mods.fml.common.Loader.loadMods(Loader.java:513)
at cpw.mods.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:160)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:407)
at net.minecraft.client.MinecraftAppletImpl.func_71384_a(SourceFile:56)
at net.minecraft.client.Minecraft.run(Minecraft.java:729)
at java.lang.Thread.run(Thread.java:662)
Caused by: java.lang.ClassNotFoundException: co.uk.flansmods.common.FlansMod
at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:238)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
at cpw.mods.fml.common.ModClassLoader.loadClass(ModClassLoader.java:56)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:247)
at cpw.mods.fml.common.FMLModContainer.constructMod(FMLModContainer.java:446)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74)
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:314)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)
at com.google.common.eventbus.EventBus.post(EventBus.java:267)
at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:165)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74)
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:314)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)
at com.google.common.eventbus.EventBus.post(EventBus.java:267)
at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:98)
at cpw.mods.fml.common.Loader.loadMods(Loader.java:503)
... 5 more
Caused by: java.lang.NullPointerException
at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:227)
... 32 more
--- END ERROR REPORT 11ca03e6 ----------

this problem is really simple.
buildcraft was dicontiued and does not work with 1.4.7 and above.

Buildcraft does work with 1.4.7 dude...
http://www.mod-buildcraft.com/
They even have a 1.5.1 version of it.