[SOLVED]Is this an ID mismatch?

Quote from cyprus2056

I tried to run IC2, IC2ComboArmors, IC2 Nuclear Control, Buildcraft and Traincraft.
When i add Traincraft to that combo, this happens:

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---- Minecraft Crash Report ----
// Don't be sad, have a hug! <3

Time: 25.02.13 01:13
Description: Failed to start game

java.lang.IllegalArgumentException: Slot 4095 is already occupied by shedar.mods.ic2.nuclearcontrol.BlockNuclearControlMain@2120a8f3 when adding src.train.common.blocks.BlockAssemblyTableI@6733fa82
at amq.(Block.java:326)
at akb.(BlockContainer.java:11)
at src.train.common.blocks.BlockAssemblyTableI.(BlockAssemblyTableI.java:25)
at src.train.common.blocks.TCBlocks.loadBlocks(TCBlocks.java:31)
at src.train.common.blocks.TCBlocks.init(TCBlocks.java:20)
at src.train.common.Traincraft.load(Traincraft.java:91)
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.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.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:456)
at asq.a(SourceFile:56)
at net.minecraft.client.Minecraft.run(Minecraft.java:744)
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_05, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 459319352 bytes (438 MB) / 648740864 bytes (618 MB) up to 954466304 bytes (910 MB)
JVM Flags: 2 total; -Xms512m -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 6.6.1.528 8 mods loaded, 8 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
mod_ReiMinimap [mod_ReiMinimap] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized
IC2 [IndustrialCraft 2] (industrialcraft-2_1.115.207-lf.jar) Unloaded->Constructed->Pre-initialized->Initialized
IC2NuclearControl [Nuclear Control] (IC2NuclearControl-1.4.6.zip) Unloaded->Constructed->Pre-initialized->Initialized
IC2CA [IndustrialCraft 2 Combo Armors] (industrialcraft2comboarmors-1.12.zip) Unloaded->Constructed->Pre-initialized->Initialized
TC [Traincraft] (Traincraft-3.1.13_030.jar) Unloaded->Constructed->Pre-initialized->Errored
LWJGL: 2.4.2
OpenGL: AMD Radeon HD 6800 Series GL version 4.2.12002 Compatibility Profile Context 9.12.0.0, 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

Is this a typical Block_ID mismatch or something 'bigger'?</init></init></init>

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When you see

java.lang.illegalArgumentException: Slot xxxx is already occupied by yyyyyyyyyyyyyy when adding zzzzzzzzzzzzzzp

then you should known it is a Block ID mismatch.

There are any MC tool to easy allocate item into "Free" non occupied ID?

^Not exactly. There is one, but it doesn't save the IDs into the configs, so you have to go through it each time MC starts up.
On the other hand, there are some mods with Dynamic Allocation in their configs, which allow the mod to search for free IDs and then set the configs to it. For example, IC2:

Quote

# Enable searching for free block ids, will get disabled after the next successful load
B:enableDynamicIdAllocation=false