So mekanism v7 isnt for 1.6.4 ?
Ive been waiting for bug fixes for my modpack server for so long, and its not backwards compatible leaving 1.6.4 so unstable, cant you backport it? so many modpacks use 1.6.4 still because 1.7 is still a hardship for many modders and they havent all updated.

Its leaving a huge performance gap for 1.6.4 :(

ah well ok /= out of all my mods most of my server uses mekanism merged with thermal expansion 3, i have nearly every industrial machine mod.

I'm very sorry, but 1.6.4 is no longer supported :(

Ya everybody on my server used them..and now they crash the server so much and im not even able to ban them..

java.util.ConcurrentModificationException
at java.util.HashMap$HashIterator.nextEntry(Unknown Source)
at java.util.HashMap$KeyIterator.next(Unknown Source)
at ic2.core.energy.EnergyNetLocal.onTickEnd(EnergyNetLocal.java:263)
at ic2.core.energy.EnergyNetGlobal.onTickEnd(EnergyNetGlobal.java:51)
at ic2.core.IC2.tickEnd(IC2.java:1793)
at cpw.mods.fml.common.SingleIntervalHandler.tickEnd(SingleIntervalHandler.java:34)
at cpw.mods.fml.common.FMLCommonHandler.tickEnd(FMLCommonHandler.java:150)
at cpw.mods.fml.common.FMLCommonHandler.onPostWorldTick(FMLCommonHandler.java:294)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:899)
at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:331)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:784)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:666)
at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:583)

This constantly happens and crashes my server

May have to end up removing the mod

That crash references only IC2 code, not Mekanism.

well this stopped happening after removing mekanism, and in another post he said he would fix it in the v7 update, which ended up being only for 1.7