Code: 19:55:17 [INFO] Dev [/192.168.2.11:63875] logged in with entity id 297 at ([test ] 153.53125, 64.0, 236.625) 19:55:19 [SEVERE] java.lang.IllegalAccessError: tried to access field net.minecr aft.server.ItemStack.damage from class org.getspout.spout.packet.standard.MCCraf tPacket103SetSlot 19:55:19 [SEVERE] at org.getspout.spout.packet.standard.MCCraftPacket103Se tSlot.setPacket(MCCraftPacket103SetSlot.java:169) 19:55:19 [SEVERE] at org.getspout.spout.packet.listener.PacketListeners.wr apPacket(PacketListeners.java:91) 19:55:19 [SEVERE] at org.getspout.spout.packet.listener.PacketListeners.ca nSend(PacketListeners.java:74) 19:55:19 [SEVERE] at org.getspout.spout.SpoutNetServerHandler.syncedSendPa cket(SpoutNetServerHandler.java:526) 19:55:19 [SEVERE] at org.getspout.spout.SpoutNetServerHandler.syncFlushPac ketQueue(SpoutNetServerHandler.java:518) 19:55:19 [SEVERE] at org.getspout.spout.SpoutNetServerHandler.syncFlushPac ketQueue(SpoutNetServerHandler.java:511) 19:55:19 [SEVERE] at org.getspout.spout.SpoutNetServerHandler.a(SpoutNetSe rverHandler.java:499) 19:55:19 [SEVERE] at net.minecraft.server.NetworkListenThread.a(SourceFile :108) 19:55:19 [SEVERE] at net.minecraft.server.MinecraftServer.h(MinecraftServe r.java:471) 19:55:19 [SEVERE] at net.minecraft.server.MinecraftServer.run(MinecraftSer ver.java:374) 19:55:19 [SEVERE] at net.minecraft.server.ThreadServerApplication.run(Sour ceFile:417) 19:55:19 [SEVERE] Unexpected exception java.lang.IllegalAccessError: tried to access field net.minecraft.server.ItemSta ck.damage from class org.getspout.spout.packet.standard.MCCraftPacket103SetSlot at org.getspout.spout.packet.standard.MCCraftPacket103SetSlot.setPacket( MCCraftPacket103SetSlot.java:169) at org.getspout.spout.packet.listener.PacketListeners.wrapPacket(PacketL isteners.java:91) at org.getspout.spout.packet.listener.PacketListeners.canSend(PacketList eners.java:74) at org.getspout.spout.SpoutNetServerHandler.syncedSendPacket(SpoutNetSer verHandler.java:526) at org.getspout.spout.SpoutNetServerHandler.syncFlushPacketQueue(SpoutNe tServerHandler.java:518) at org.getspout.spout.SpoutNetServerHandler.syncFlushPacketQueue(SpoutNe tServerHandler.java:511) at org.getspout.spout.SpoutNetServerHandler.a(SpoutNetServerHandler.java :499) at net.minecraft.server.NetworkListenThread.a(SourceFile:108) at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:471) at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:374) at net.minecraft.server.ThreadServerApplication.run(SourceFile:417) For some reason whenever I join my own server this happens, but I can sign in on another window of minecraft (under the name of testr) and it works fine. But I cannot join myself. Im using RB 1317.