I'm making a modded .jar server for a friend and I to play on with the mod 'Orespawn'. The version is 1.6.4, I installed the latest forge and Java. Also, I've installed servers before, but I haven't seen this.
I get this whenever I start the run.bat
2014-10-14 23:05:36 [INFO] [ForgeModLoader] Forge Mod Loader version 6.4.49.965 for Minecraft 1.6.4 loading
2014-10-14 23:05:36 [INFO] [ForgeModLoader] Java is Java HotSpot(TM) Client VM, version 1.8.0_25, running on Windows 7:x86:6.1, installed at C:\Program Files\Java\jre1.8.0_25
2014-10-14 23:05:36 [FINE] [ForgeModLoader] Java classpath at launch is s.jar
2014-10-14 23:05:36 [FINE] [ForgeModLoader] Java library path at launch is C:\ProgramData\Oracle\Java\javapath;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:\ProgramData\Oracle\Java\javapath;C:\Program Files\NVIDIA Corporation\PhysX\Common;C:\Program Files\Common Files\Microsoft Shared\Windows Live;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files\Windows Live\Shared;C:\Program Files\Java\jre7\bin;;.
2014-10-14 23:05:36 [FINE] [ForgeModLoader] Enabling runtime deobfuscation
2014-10-14 23:05:36 [FINE] [ForgeModLoader] Instantiating coremod class FMLCorePlugin
2014-10-14 23:05:36 [FINE] [ForgeModLoader] Enqueued coremod FMLCorePlugin
2014-10-14 23:05:36 [FINE] [ForgeModLoader] Instantiating coremod class FMLForgePlugin
2014-10-14 23:05:36 [FINE] [ForgeModLoader] Enqueued coremod FMLForgePlugin
2014-10-14 23:05:36 [FINE] [ForgeModLoader] All fundamental core mods are successfully located
2014-10-14 23:05:36 [FINE] [ForgeModLoader] Discovering coremods
2014-10-14 23:05:36 [INFO] [ForgeModLoader] Loading tweak class name cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
2014-10-14 23:05:36 [INFO] [ForgeModLoader] Loading tweak class name cpw.mods.fml.common.launcher.FMLDeobfTweaker
2014-10-14 23:05:36 [INFO] [ForgeModLoader] Calling tweak class cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
2014-10-14 23:05:36 [SEVERE] [ForgeModLoader] Unable to launch
java.util.ConcurrentModificationException
at java.util.ArrayList$Itr.checkForComodification(Unknown Source)
at java.util.ArrayList$Itr.remove(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:114)
at net.minecraft.launchwrapper.Launch.main(Launch.java:27)
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.java:48)
at cpw.mods.fml.relauncher.ServerLaunchWrapper.main(ServerLaunchWrapper.java:17)
I get this whenever I start the run.bat
2014-10-14 23:05:36 [INFO] [ForgeModLoader] Forge Mod Loader version 6.4.49.965 for Minecraft 1.6.4 loading
2014-10-14 23:05:36 [INFO] [ForgeModLoader] Java is Java HotSpot(TM) Client VM, version 1.8.0_25, running on Windows 7:x86:6.1, installed at C:\Program Files\Java\jre1.8.0_25
2014-10-14 23:05:36 [FINE] [ForgeModLoader] Java classpath at launch is s.jar
2014-10-14 23:05:36 [FINE] [ForgeModLoader] Java library path at launch is C:\ProgramData\Oracle\Java\javapath;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:\ProgramData\Oracle\Java\javapath;C:\Program Files\NVIDIA Corporation\PhysX\Common;C:\Program Files\Common Files\Microsoft Shared\Windows Live;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files\Windows Live\Shared;C:\Program Files\Java\jre7\bin;;.
2014-10-14 23:05:36 [FINE] [ForgeModLoader] Enabling runtime deobfuscation
2014-10-14 23:05:36 [FINE] [ForgeModLoader] Instantiating coremod class FMLCorePlugin
2014-10-14 23:05:36 [FINE] [ForgeModLoader] Enqueued coremod FMLCorePlugin
2014-10-14 23:05:36 [FINE] [ForgeModLoader] Instantiating coremod class FMLForgePlugin
2014-10-14 23:05:36 [FINE] [ForgeModLoader] Enqueued coremod FMLForgePlugin
2014-10-14 23:05:36 [FINE] [ForgeModLoader] All fundamental core mods are successfully located
2014-10-14 23:05:36 [FINE] [ForgeModLoader] Discovering coremods
2014-10-14 23:05:36 [INFO] [ForgeModLoader] Loading tweak class name cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
2014-10-14 23:05:36 [INFO] [ForgeModLoader] Loading tweak class name cpw.mods.fml.common.launcher.FMLDeobfTweaker
2014-10-14 23:05:36 [INFO] [ForgeModLoader] Calling tweak class cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
2014-10-14 23:05:36 [SEVERE] [ForgeModLoader] Unable to launch
java.util.ConcurrentModificationException
at java.util.ArrayList$Itr.checkForComodification(Unknown Source)
at java.util.ArrayList$Itr.remove(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:114)
at net.minecraft.launchwrapper.Launch.main(Launch.java:27)
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.java:48)
at cpw.mods.fml.relauncher.ServerLaunchWrapper.main(ServerLaunchWrapper.java:17)
Any help as soon as possible will be appreciated!