Dasreyh

Same issue here, its been driving me crazy. Been trying to update my mod to 1.20.1, even creating a blank project has this issue. Using VSCode. @samjviana's recommendation allows to run successfully now.

C:\Desktop\FORGE SERVER>java -Xmx1024M -Xms1024M -jar forge-1.6.4- 9.11.1.965-universal.jar Apr 26, 2014 7:00:42 PM net.minecraft.launchwrapper.LogWrapper log INFO: Loading tweak class name cpw.mods.fml.common.launcher.FMLServerTweaker Apr 26, 2014 7:00:42 PM net.minecraft.launchwrapper.LogWrapper log INFO: Using primary tweak class name cpw.mods.fml.common.launcher.FMLServerTweak er Apr 26, 2014 7:00:42 PM net.minecraft.launchwrapper.LogWrapper log INFO: Calling tweak class cpw.mods.fml.common.launcher.FMLServerTweaker A problem occurred running the Server launcher.java.lang.reflect.InvocationTarge tException 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.relauncher.ServerLaunchWrapper.run(ServerLaunchWrapper.j ava:48) at cpw.mods.fml.relauncher.ServerLaunchWrapper.main(ServerLaunchWrapper. java:17) Caused by: java.lang.NoClassDefFoundError: com/google/common/collect/Lists at cpw.mods.fml.common.launcher.FMLTweaker.acceptOptions(FMLTweaker.java :52) at net.minecraft.launchwrapper.Launch.launch(Launch.java:110) at net.minecraft.launchwrapper.Launch.main(Launch.java:27) ... 6 more Caused by: java.lang.ClassNotFoundException: com.google.common.collect.Lists at java.net.URLClassLoader$1.run(Unknown Source) at java.net.URLClassLoader$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) ... 9 more C:\Desktop\FORGE SERVER>

Everytime i try to get onto my modded forge server i get "Internal server error". Whats going on? It works perfectly fine in singleplayer. I also have the same exact mods in the server and my client. Here is my server log... 2013-12-28 00:15:23 [iNFO] Starting minecraft server version 1.6.4 2013-12-28 00:15:44 [iNFO] Loading properties 2013-12-28 00:15:44 [iNFO] Default game type: SURVIVAL 2013-12-28 00:15:44 [iNFO] Generating keypair 2013-12-28 00:15:45 [iNFO] Starting Minecraft server on *:25565 2013-12-28 00:16:01 [iNFO] Preparing level "world" 2013-12-28 00:16:03 [iNFO] Preparing start region for level 0 2013-12-28 00:16:04 [iNFO] Preparing spawn area: 1% 2013-12-28 00:16:06 [iNFO] Preparing spawn area: 11% 2013-12-28 00:16:07 [iNFO] Preparing spawn area: 23% 2013-12-28 00:16:08 [iNFO] Preparing spawn area: 87% 2013-12-28 00:16:09 [iNFO] Done (8.381s)! For help, type "help" or "?" 2013-12-28 00:17:02 [sEVERE] Reached end of stream for /24.140.81.67 2013-12-28 00:17:09 [iNFO] Disconnecting dasreyh [/24.140.81.67:56602]: Internal server error 2013-12-28 00:17:09 [WARNING] Failed to handle packet for dasreyh [/24.140.81.67:56602]: java.lang.NullPointerException java.lang.NullPointerException at cpw.mods.fml.common.modloader.ModLoaderNetworkHandler.acceptVersion(ModLoaderNetworkHandler.java:49) at cpw.mods.fml.common.network.ModListResponsePacket.execute(ModListResponsePacket.java:115) at cpw.mods.fml.common.network.FMLNetworkHandler.handleFMLPacket(FMLNetworkHandler.java:116) at cpw.mods.fml.common.network.FMLNetworkHandler.handlePacket250Packet(FMLNetworkHandler.java:81) at net.minecraft.network.NetLoginHandler.func_72501_a(NetLoginHandler.java:338) at net.minecraft.network.packet.Packet250CustomPayload.func_73279_a(SourceFile:61) at net.minecraft.network.TcpConnection.func_74428_b(TcpConnection.java:462) at net.minecraft.network.NetLoginHandler.func_72532_c(NetLoginHandler.java:80) at net.minecraft.server.ServerListenThread.func_71766_a(ServerListenThread.java:55) at net.minecraft.server.dedicated.DedicatedServerListenThread.func_71747_b(SourceFile:29) at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:691) at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:276) at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:587) at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:484) at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:583) 2013-12-28 00:17:09 [sEVERE] Reached end of stream for /24.140.81.67 2013-12-28 00:17:11 [sEVERE] Reached end of stream for /24.140.81.67