i installed Hexxit earlier today and played it with no problems and it was saying that the coremods folder is corrputed. I don't know why it did this and i really need help so i can get back to learning more about the mods.
Error Code:
2013-06-22 23:11:04 [iNFO] [ForgeModLoader] Forge Mod Loader version 5.2.23.737 for Minecraft 1.5.2 loading
2013-06-22 23:11:04 [iNFO] [ForgeModLoader] Java is Java HotSpot 64-Bit Server VM, version 1.7.0_09, running on Windows 7:amd64:6.1, installed at C:Program FilesJavajre7
2013-06-22 23:11:04 [FINE] [ForgeModLoader] Java classpath at launch is C:UsersClaytonDesktopTechnic Launcher.jar
2013-06-22 23:11:04 [FINE] [ForgeModLoader] Java library path at launch is C:Program FilesJavajre7bin;C:WindowsSunJavabin;C:Windowssystem32;C:Windows;C:Program FilesCommon FilesMicrosoft SharedWindows Live;C:Program Files (x86)Common FilesMicrosoft SharedWindows Live;C:Windowssystem32;C:Windows;C:WindowsSystem32Wbem;C:WindowsSystem32WindowsPowerShellv1.0;C:Program Files (x86)Common FilesRoxio SharedDLLShared;C:Program Files (x86)Windows LiveShared;C:Program Files (x86)QuickTimeQTSystem;.
2013-06-22 23:11:04 [FINE] [ForgeModLoader] Enabling runtime deobfuscation
2013-06-22 23:11:05 [FINEST] [ForgeModLoader] All core mods are successfully located
2013-06-22 23:11:05 [FINEST] [ForgeModLoader] Discovering coremods
2013-06-22 23:11:31 [iNFO] [sTDERR] java.lang.RuntimeException: java.lang.NullPointerException
2013-06-22 23:11:31 [iNFO] [sTDERR] at cpw.mods.fml.relauncher.FMLRelauncher.setupHome(FMLRelauncher.java:192)
2013-06-22 23:11:31 [iNFO] [sTDERR] at cpw.mods.fml.relauncher.FMLRelauncher.relaunchApplet(FMLRelauncher.java:259)
2013-06-22 23:11:31 [iNFO] [sTDERR] at cpw.mods.fml.relauncher.FMLRelauncher.appletEntry(FMLRelauncher.java:229)
2013-06-22 23:11:31 [iNFO] [sTDERR] at net.minecraft.client.MinecraftApplet.init(MinecraftApplet.java:25)
2013-06-22 23:11:31 [iNFO] [sTDERR] at net.minecraft.Launcher.init(Launcher.java:127)
2013-06-22 23:11:31 [iNFO] [sTDERR] at org.spoutcraft.launcher.GameLauncher.runGame(GameLauncher.java:200)
2013-06-22 23:11:31 [iNFO] [sTDERR] at org.spoutcraft.launcher.GameUpdater.runGame(GameUpdater.java:81)
2013-06-22 23:11:31 [iNFO] [sTDERR] at org.spoutcraft.launcher.skin.LoginFrame.onEvent(LoginFrame.java:300)
2013-06-22 23:11:31 [iNFO] [sTDERR] at org.spoutcraft.launcher.skin.LoginWorker.doInBackground(LoginWorker.java:102)
2013-06-22 23:11:31 [iNFO] [sTDERR] at org.jdesktop.swingworker.SwingWorker$1.call(Unknown Source)
2013-06-22 23:11:31 [iNFO] [sTDERR] at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
2013-06-22 23:11:31 [iNFO] [sTDERR] at java.util.concurrent.FutureTask.run(Unknown Source)
2013-06-22 23:11:31 [iNFO] [sTDERR] at org.jdesktop.swingworker.SwingWorker.run(Unknown Source)
2013-06-22 23:11:31 [iNFO] [sTDERR] at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
2013-06-22 23:11:31 [iNFO] [sTDERR] at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
2013-06-22 23:11:31 [iNFO] [sTDERR] at java.lang.Thread.run(Unknown Source)
2013-06-22 23:11:32 [iNFO] [sTDERR] Caused by: java.lang.NullPointerException
2013-06-22 23:11:32 [iNFO] [sTDERR] at java.util.ComparableTimSort.sort(Unknown Source)
2013-06-22 23:11:32 [iNFO] [sTDERR] at java.util.Arrays.sort(Unknown Source)
2013-06-22 23:11:32 [iNFO] [sTDERR] at cpw.mods.fml.relauncher.RelaunchLibraryManager.discoverCoreMods(RelaunchLibraryManager.java:349)
2013-06-22 23:11:32 [iNFO] [sTDERR] at cpw.mods.fml.relauncher.RelaunchLibraryManager.handleLaunch(RelaunchLibraryManager.java:136)
2013-06-22 23:11:32 [iNFO] [sTDERR] at cpw.mods.fml.relauncher.FMLRelauncher.setupHome(FMLRelauncher.java:172)
2013-06-22 23:11:32 [iNFO] [sTDERR] ... 15 more