Minecraft Forums

got this off launch

C:\Users\Austin\Desktop\serv>java -Xms2048m -Xmx2048m -XX:PermSize=128m -jar FTBServer-1.6.4-965.jar nogui
Java HotSpot(TM) 64-Bit Server VM warning: ignoring option PermSize=128m; support was removed in 8.0
Feb 22, 2016 9:02:48 PM net.minecraft.launchwrapper.LogWrapper log
INFO: Loading tweak class name cpw.mods.fml.common.launcher.FMLServerTweaker
Feb 22, 2016 9:02:48 PM net.minecraft.launchwrapper.LogWrapper log
INFO: Using primary tweak class name cpw.mods.fml.common.launcher.FMLServerTweaker
Feb 22, 2016 9:02:48 PM net.minecraft.launchwrapper.LogWrapper log
INFO: Calling tweak class cpw.mods.fml.common.launcher.FMLServerTweaker
2016-02-22 21:02:48 [INFO] [ForgeModLoader] Forge Mod Loader version 6.4.49.965 for Minecraft 1.6.4 loading
2016-02-22 21:02:48 [INFO] [ForgeModLoader] Java is Java HotSpot(TM) 64-Bit Server VM, version 1.8.0_73, running on Windows 10:amd64:10.0, installed at C:\Program Files\Java\jre1.8.0_73
2016-02-22 21:02:48 [WARNING] [ForgeModLoader] The coremod codechicken.core.launch.DepLoader does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2016-02-22 21:02:48 [WARNING] [ForgeModLoader] The coremod worldcore.asm.WCFMLLoadingPlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2016-02-22 21:02:48 [WARNING] [ForgeModLoader] The coremod biomesoplenty.asm.BOPFMLLoadingPlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2016-02-22 21:02:48 [WARNING] [ForgeModLoader] The coremod codechicken.core.launch.CodeChickenCorePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2016-02-22 21:02:48 [WARNING] [ForgeModLoader] The coremod cofh.asm.LoadingPlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2016-02-22 21:02:48 [WARNING] [ForgeModLoader] The coremod mcp.mobius.evoc.asm.CoreDescription does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2016-02-22 21:02:48 [WARNING] [ForgeModLoader] The coremod invtweaks.forge.asm.FMLPlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2016-02-22 21:02:48 [WARNING] [ForgeModLoader] The coremod mcp.mobius.mobiuscore.asm.CoreDescription does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2016-02-22 21:02:48 [WARNING] [ForgeModLoader] The coremod codechicken.nei.asm.NEICorePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2016-02-22 21:02:48 [WARNING] [ForgeModLoader] The coremod lumien.randomthings.Transformer.RTLoadingPlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2016-02-22 21:02:48 [INFO] [ForgeModLoader] Loading tweak class name cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
2016-02-22 21:02:48 [INFO] [ForgeModLoader] Loading tweak class name cpw.mods.fml.common.launcher.FMLDeobfTweaker
2016-02-22 21:02:48 [INFO] [ForgeModLoader] Calling tweak class cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker

C:\Users\Austin\Desktop\serv>pause
Press any key to continue . . .

any ideas?

Post fml logs or crash report.