Everytime I launch up my server with no mods installed, I always keep getting this error:

 

Last login: Sat Oct 12 21:29:42 on ttys000
/Users/WeatherGameMan97/Desktop/Server/Start.Command ; exit;
DarkSeph22:~ WeatherGameMan97$ /Users/WeatherGameMan97/Desktop/Server/Start.Command ; exit;
Oct 12, 2013 9:30:07 PM net.minecraft.launchwrapper.LogWrapper log
INFO: Loading tweak class name cpw.mods.fml.common.launcher.FMLServerTweaker
Oct 12, 2013 9:30:07 PM net.minecraft.launchwrapper.LogWrapper log
INFO: Using primary tweak class name cpw.mods.fml.common.launcher.FMLServerTweaker
Oct 12, 2013 9:30:07 PM net.minecraft.launchwrapper.LogWrapper log
INFO: Calling tweak class cpw.mods.fml.common.launcher.FMLServerTweaker
2013-10-12 21:30:07 [iNFO] [ForgeModLoader] Forge Mod Loader version 6.4.20.916 for Minecraft 1.6.4 loading
2013-10-12 21:30:07 [iNFO] [ForgeModLoader] Java is Java HotSpot(TM) 64-Bit Server VM, version 1.6.0_51, running on Mac OS X:x86_64:10.8.4, installed at /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home
2013-10-12 21:30:07 [iNFO] [sTDOUT] Loaded 40 rules from AccessTransformer config file fml_at.cfg
2013-10-12 21:30:07 [iNFO] [sTDOUT] Loaded 109 rules from AccessTransformer config file forge_at.cfg
2013-10-12 21:30:09 [iNFO] [ForgeModLoader] Found valid fingerprint for Minecraft Forge. Certificate fingerprint e3c3d50c7c986df74c645c0ac54639741c90a557
2013-10-12 21:30:09 [iNFO] [ForgeModLoader] Loading tweak class name cpw.mods.fml.common.launcher.FMLDeobfTweaker
2013-10-12 21:30:09 [iNFO] [ForgeModLoader] Calling tweak class cpw.mods.fml.common.launcher.FMLDeobfTweaker
2013-10-12 21:30:09 [sEVERE] [ForgeModLoader] Unable to launch
java.lang.ClassNotFoundException: net.minecraft.server.MinecraftServer
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:186)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:249)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:127)
at net.minecraft.launchwrapper.Launch.main(Launch.java:27)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at cpw.mods.fml.relauncher.ServerLaunchWrapper.run(ServerLaunchWrapper.java:48)
at cpw.mods.fml.relauncher.ServerLaunchWrapper.main(ServerLaunchWrapper.java:17)
Caused by: java.lang.NullPointerException
at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:191)
at com.google.common.hash.AbstractByteHasher.putBytes(AbstractByteHasher.java:69)
at com.google.common.hash.AbstractStreamingHashFunction.hashBytes(AbstractStreamingHashFunction.java:57)
at cpw.mods.fml.common.patcher.ClassPatchManager.applyPatch(ClassPatchManager.java:101)
at cpw.mods.fml.common.asm.transformers.PatchingTransformer.transform(PatchingTransformer.java:10)
at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:274)
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:172)
... 12 more
logout

[Process completed]

 

 

Can anybody help me fix this?

 

 

 

Did you rename your server?

It should be minecraft_server.1.6.4.jar

No i did not rename my server. Its still minecraft_server.1.6.4.jar