I know I have some other mods installed too, but I'm sure that the incompatibility is between these two mods (I tested it): Inv Tweaks and Crafting Pillars. Can someone help me to fix it?

---- Minecraft Crash Report ----
// Don't be sad. I'll do better next time, I promise!

Time: 28/03/14 22:09
Description: There was a severe problem during mod loading that has caused the game to fail

cpw.mods.fml.common.LoaderException: java.lang.Error: InvTweaks config load failed
at cpw.mods.fml.common.LoadController.transition(LoadController.java:163)
at cpw.mods.fml.common.Loader.initializeMods(Loader.java:674)
at cpw.mods.fml.client.FMLClientHandler.finishMinecraftLoading(FMLClientHandler.java:267)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:559)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:853)
at net.minecraft.client.main.Main.main(SourceFile:103)
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 net.minecraft.launchwrapper.Launch.launch(Launch.java:134)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
Caused by: java.lang.Error: InvTweaks config load failed
at invtweaks.InvTweaksConfigManager.loadConfig(InvTweaksConfigManager.java:187)
at invtweaks.InvTweaksConfigManager.makeSureConfigurationIsLoaded(InvTweaksConfigManager.java:59)
at invtweaks.InvTweaks.(InvTweaks.java:105)
at invtweaks.forge.ClientProxy.init(ClientProxy.java:40)
at invtweaks.forge.InvTweaksMod.init(InvTweaksMod.java:36)
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:513)
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:74)
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:47)
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.sendEventToModContainer(LoadController.java:209)
at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:188)
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:74)
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:47)
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:119)
at cpw.mods.fml.common.Loader.initializeMods(Loader.java:673)
... 10 more
Caused by: java.lang.NullPointerException
at net.minecraft.item.ItemStack.func_77960_j(ItemStack.java:231)
at invtweaks.InvTweaksItemTree.registerOre(InvTweaksItemTree.java:327)
at invtweaks.InvTweaksItemTreeLoader.startElement(InvTweaksItemTreeLoader.java:141)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.AbstractXMLDocumentParser.emptyElement(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanStartElement(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl.parse(Unknown Source)
at javax.xml.parsers.SAXParser.parse(Unknown Source)
at invtweaks.InvTweaksItemTreeLoader.load(InvTweaksItemTreeLoader.java:51)
at invtweaks.InvTweaksConfig.load(InvTweaksConfig.java:106)
at invtweaks.InvTweaksConfigManager.loadConfig(InvTweaksConfigManager.java:175)
... 40 more
Caused by: java.lang.NullPointerException
at net.minecraft.item.ItemStack.func_77960_j(ItemStack.java:231)
at invtweaks.InvTweaksItemTree.registerOre(InvTweaksItemTree.java:327)
at invtweaks.InvTweaksItemTreeLoader.startElement(InvTweaksItemTreeLoader.java:141)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.AbstractXMLDocumentParser.emptyElement(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanStartElement(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl.parse(Unknown Source)
at javax.xml.parsers.SAXParser.parse(Unknown Source)
at invtweaks.InvTweaksItemTreeLoader.load(InvTweaksItemTreeLoader.java:51)
at invtweaks.InvTweaksConfig.load(InvTweaksConfig.java:106)
at invtweaks.InvTweaksConfigManager.loadConfig(InvTweaksConfigManager.java:143)
... 40 more

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

-- System Details --
Details:
Minecraft Version: 1.7.2
Operating System: Windows 7 (x86) version 6.1
Java Version: 1.7.0_45, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
Memory: 71475504 bytes (68 MB) / 240590848 bytes (229 MB) up to 1037959168 bytes (989 MB)
JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1024m
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP v9.01-pre FML v7.2.129.1047 Minecraft Forge 10.12.0.1047 13 mods loaded, 13 mods active
mcp{8.09} Minecraft Coder Pack Unloaded->Constructed->Pre-initialized->Initialized
FML{7.2.129.1047} Forge Mod Loader Unloaded->Constructed->Pre-initialized->Initialized
Forge{10.12.0.1047} Minecraft Forge Unloaded->Constructed->Pre-initialized->Initialized
SC0_SpaceCore{0.7.6} [SpaceCore]([1.7.2] SpaceCore 0.7.6.jar) Unloaded->Constructed->Pre-initialized->Initialized
SC0_MorePotionTypes{1.0.2} [More Potion Types]([1.7.2] More Potion Types 1.0.2.zip) Unloaded->Constructed->Pre-initialized->Initialized
bspkrsCore{6.0(1.7.2)} bspkrsCore Unloaded->Constructed->Pre-initialized->Initialized
ArmorStatusHUD{1.18(1.7.2)} ArmorStatusHUD Unloaded->Constructed->Pre-initialized->Initialized
CrystalWing{1.7.2.r01} CrystalWing Unloaded->Constructed->Pre-initialized->Initialized
DamageIndicatorsMod{3.1.0} Damage Indicators Unloaded->Constructed->Pre-initialized->Initialized
FloatingRuins{1.7.2.r02} FloatingRuins Unloaded->Constructed->Pre-initialized->Initialized
BiomesOPlenty{2.0.0} Biomes O' Plenty Unloaded->Constructed->Pre-initialized->Initialized
craftingpillars{1.5.0} Crafting Pillars Mod Unloaded->Constructed->Pre-initialized->Initialized
inventorytweaks{1.57-116} Inventory Tweaks Unloaded->Constructed->Pre-initialized->Errored

Looks more like #153 to me. Update BOP.

I don't know what build they fixed in it, check the changelogs or ask them. If you do have a fixed version of BOP, refer whoever made the other mod you think did this to this report and the BOP one.

BOP is in version 2.0.0.726, is it a fixed one?

I am using Minecraft 1.7.2. This instance has nothing but Forge 10.12.1.1110, Crafting Pillars v1.5, and InventoryTweaks v1.57-116. Out of 80+ mods, these are the only two that don't get along. I have run them in this isolated instance for a pure error report. The problem is that I don't understand how to fix it or which is causing it.

Any help would be greatly appreciated. Sorry to re-open a closed issue, but I thought that it would be better than opening a new one.

==================================Begin Error Log===================================

---- Minecraft Crash Report ----
// This is a token for 1 free hug. Redeem at your nearest Mojangsta: [HUG]

Time: 6/3/14 10:35 PM
Description: There was a severe problem during mod loading that has caused the game to fail

cpw.mods.fml.common.LoaderException: java.lang.Error: InvTweaks config load failed
at cpw.mods.fml.common.LoadController.transition(LoadController.java:162)
at cpw.mods.fml.common.Loader.initializeMods(Loader.java:691)
at cpw.mods.fml.client.FMLClientHandler.finishMinecraftLoading(FMLClientHandler.java:288)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:527)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:815)
at net.minecraft.client.main.Main.main(SourceFile:103)
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 net.minecraft.launchwrapper.Launch.launch(Launch.java:134)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
Caused by: java.lang.Error: InvTweaks config load failed
at invtweaks.InvTweaksConfigManager.loadConfig(InvTweaksConfigManager.java:187)
at invtweaks.InvTweaksConfigManager.makeSureConfigurationIsLoaded(InvTweaksConfigManager.java:59)
at invtweaks.InvTweaks.(InvTweaks.java:105)
at invtweaks.forge.ClientProxy.init(ClientProxy.java:40)
at invtweaks.forge.InvTweaksMod.init(InvTweaksMod.java:36)
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:513)
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:74)
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:47)
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.sendEventToModContainer(LoadController.java:208)
at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:187)
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:74)
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:47)
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:118)
at cpw.mods.fml.common.Loader.initializeMods(Loader.java:690)
... 10 more
Caused by: java.lang.NullPointerException
at net.minecraft.item.ItemStack.func_77960_j(ItemStack.java:214)
at invtweaks.InvTweaksItemTree.registerOre(InvTweaksItemTree.java:327)
at invtweaks.InvTweaksItemTreeLoader.startElement(InvTweaksItemTreeLoader.java:141)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.AbstractXMLDocumentParser.emptyElement(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanStartElement(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl.parse(Unknown Source)
at javax.xml.parsers.SAXParser.parse(Unknown Source)
at invtweaks.InvTweaksItemTreeLoader.load(InvTweaksItemTreeLoader.java:51)
at invtweaks.InvTweaksConfig.load(InvTweaksConfig.java:106)
at invtweaks.InvTweaksConfigManager.loadConfig(InvTweaksConfigManager.java:175)
... 41 more
Caused by: java.lang.NullPointerException
at net.minecraft.item.ItemStack.func_77960_j(ItemStack.java:214)
at invtweaks.InvTweaksItemTree.registerOre(InvTweaksItemTree.java:327)
at invtweaks.InvTweaksItemTreeLoader.startElement(InvTweaksItemTreeLoader.java:141)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.AbstractXMLDocumentParser.emptyElement(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanStartElement(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl.parse(Unknown Source)
at javax.xml.parsers.SAXParser.parse(Unknown Source)
at invtweaks.InvTweaksItemTreeLoader.load(InvTweaksItemTreeLoader.java:51)
at invtweaks.InvTweaksConfig.load(InvTweaksConfig.java:106)
at invtweaks.InvTweaksConfigManager.loadConfig(InvTweaksConfigManager.java:143)
... 41 more

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

-- System Details --
Details:
Minecraft Version: 1.7.2
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: 426119032 bytes (406 MB) / 1004011520 bytes (957 MB) up to 2077753344 bytes (1981 MB)
JVM Flags: 8 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:+AggressiveOpts -XX:+CMSClassUnloadingEnabled -XX:PermSize=128m -Xms1G -Xmx2G
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP v9.03 FML v7.2.207.1110 Minecraft Forge 10.12.1.1110 5 mods loaded, 5 mods active
mcp{9.03} Minecraft Coder Pack Unloaded->Constructed->Pre-initialized->Initialized
FML{7.2.207.1110} Forge Mod Loader Unloaded->Constructed->Pre-initialized->Initialized
Forge{10.12.1.1110} Minecraft Forge Unloaded->Constructed->Pre-initialized->Initialized
craftingpillars{1.5.0} [Crafting Pillars Mod]([1.7.2] CraftingPillars v1.5.jar) Unloaded->Constructed->Pre-initialized->Initialized
inventorytweaks{1.57-116} Inventory Tweaks Unloaded->Constructed->Pre-initialized->Errored