I have again this problem:

Caused by: java.lang.IndexOutOfBoundsException: readerIndex(9) + length(4) exceeds writerIndex(10): UnpooledSlicedByteBuf(ridx: 9, widx: 10, cap: 10/10, unwrapped: PooledUnsafeDirectByteBuf(ridx: 0, widx: 11, cap: 11))
at io.netty.buffer.AbstractByteBuf.checkReadableBytes0(AbstractByteBuf.java:1396) ~[netty-all-4.1.9.Final.jar:4.1.9.Final]
at io.netty.buffer.AbstractByteBuf.readInt(AbstractByteBuf.java:766) ~[netty-all-4.1.9.Final.jar:4.1.9.Final]
at com.creativemd.creativecore.common.packet.CreativeCorePacket.readPos(CreativeCorePacket.java:77) ~[CreativeCorePacket.class:?]
at com.creativemd.littletiles.common.packet.LittleBlockPacket.readBytes(LittleBlockPacket.java:191) ~[LittleBlockPacket.class:?]
at com.creativemd.creativecore.common.packet.CreativeMessageHandler.fromBytes(CreativeMessageHandler.java:46) ~[CreativeMessageHandler.class:?]
at net.minecraftforge.fml.common.network.simpleimpl.SimpleIndexedCodec.decodeInto(SimpleIndexedCodec.java:36) ~[SimpleIndexedCodec.class:?]
at net.minecraftforge.fml.common.network.simpleimpl.SimpleIndexedCodec.decodeInto(SimpleIndexedCodec.java:26) ~[SimpleIndexedCodec.class:?]
at net.minecraftforge.fml.common.network.FMLIndexedMessageToMessageCodec.decode(FMLIndexedMessageToMessageCodec.java:111) ~[FMLIndexedMessageToMessageCodec.class:?]
at net.minecraftforge.fml.common.network.FMLIndexedMessageToMessageCodec.decode(FMLIndexedMessageToMessageCodec.java:41) ~[FMLIndexedMessageToMessageCodec.class:?]
at io.netty.handler.codec.MessageToMessageCodec$2.decode(MessageToMessageCodec.java:81) ~[netty-all-4.1.9.Final.jar:4.1.9.Final]
at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:88) ~[netty-all-4.1.9.Final.jar:4.1.9.Final]
... 57 more
[11:31:02] [Netty Client IO #3/ERROR] [FML]: Network Disconnect: A fatal error has occurred, this connection is terminated

What mods are installed on server and what mods are installed on the client? EnhancedVisuals for example also needs to be installed on both ends.

I have so many mods,

• security craft
• alchemistery
• alib
• betterfps
• cdm
• cocricot
• codechickenlib
• coocking for blockHeads
• creativecore
• CTM
• customNPCS
• psychedelicraft
• ecologymod
• effortlessbuildings
• ekimod
• emoticons
• fairylights
• firstaid
• fixRTM
• foamfix
• forgelin
• forgeMultipart
• Furenuki's roads
• furniture
• hideNames
• ICBM
• ichunUtil
• IvToolkit
• Jei
• little frames
• little tittles
• locks
• malisisdoorcore
• malisisdoors
• mclib
• mc paint
• MCTE
• Mekanism
• modular voicechat
• mrtjpcore
• ngtlib
• nifty
• nostalgien
• noIDS
• noItems
• obfuscate
• optifine
• playerApi
• playerRevive
• projectRed base
• projectRed immigration
• redstone remote
• rojiuramod
• rtm
• scp
• secretsdoor
• shadowMC
• signalController
• SignPicture
• staminaplus
• the Rc Mod
• tonaBlock Plus
• tonaMod v2
• tonationRP Phone mod
• tough as nails
• traffic control
• u team core
• usefull backpacks
• vehicle
• wireless redstone
• z radio

And the server which I have has the old version of Little Tilles.

And what is installed on the server? Pretty sure the issue is caused by either different versions on server and client or a mod is installed on client side but not in on server side.

All of this mod is installed on the server side but they are not optifine and better fps as well.

I have also the same versions for the differents mods on the server and client side.

That is definitely not the case, because otherwise it would work. Send me the latest.log from server and client.

Holly Jesus IT WOOORKS.

I don't know what i have touched but i don't have a fatal error!

I have copy/paste the client mod file into the fre***y server mod file and it work perfectly!

Thanks for you're help!

Glad it works now.