Hello, I'm new to Bukkit I'm from Brazil (I'm utilizanod google translator) My server was perfect, i made a mistake that damaged some chunks, got up, and all right, but then started giving errors in various plugins, mob spawn , 9 essentials, protective of the chat, to spawn and GeoIP) means the admins, group manager, multiplehomes nor the standard functions (such as the Op and gamemodes), if you enter gamemode (player) (mode) appears this error: 02:42 PM [SEVERE] Exception in thread "AWT-EventQueue-0" 02:42 PM [SEVERE] org.bukkit.command.CommandException: Unhandled exception executing command 'gamemode' in Essentials plugin vPre2.7.1.7 02:42 PM [SEVERE] at org.bukkit.command.PluginCommand.execute (PluginCommand.java: 42) 02:42 PM [SEVERE] at org.bukkit.command.SimpleCommandMap.dispatch (SimpleCommandMap.java: 163) 02:42 PM [SEVERE] at org.bukkit.craftbukkit.CraftServer.dispatchCommand (CraftServer.java: 364) 02:42 PM [SEVERE] at 02:42 PM [SEVERE] at javax.swing.JTextField.fireActionPerformed (Unknown Source) 02:42 PM [SEVERE] at javax.swing.JTextField.postActionEvent (Unknown Source) 02:42 PM [SEVERE] at $ javax.swing.JTextField NotifyAction.actionPerformed (Unknown Source) 02:42 PM [SEVERE] at javax.swing.SwingUtilities.notifyAction (Unknown Source) 02:42 PM [SEVERE] at javax.swing.JComponent.processKeyBinding (Unknown Source) 02:42 PM [SEVERE] at javax.swing.JComponent.processKeyBindings (Unknown Source) 02:42 PM [SEVERE] at javax.swing.JComponent.processKeyEvent (Unknown Source) 02:42 PM [SEVERE] at java.awt.Component.processEvent (Unknown Source) 02:42 PM [SEVERE] at java.awt.Container.processEvent (Unknown Source) 02:42 PM [SEVERE] at java.awt.Component.dispatchEventImpl (Unknown Source) 02:42 PM [SEVERE] at java.awt.Container.dispatchEventImpl (Unknown Source) 02:42 PM [SEVERE] at java.awt.Component.dispatchEvent (Unknown Source) 02:42 PM [SEVERE] at java.awt.KeyboardFocusManager.redispatchEvent (Unknown Source) 02:42 PM [SEVERE] at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent (Unknown Source) 02:42 PM [SEVERE] at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent (Unknown Source) 02:42 PM [SEVERE] at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions (Unknown Source) 02:42 PM [SEVERE] at java.awt.DefaultKeyboardFocusManager.dispatchEvent (Unknown Source) 02:42 PM [SEVERE] at java.awt.Component.dispatchEventImpl (Unknown Source) 02:42 PM [SEVERE] at java.awt.Container.dispatchEventImpl (Unknown Source) 02:42 PM [SEVERE] at java.awt.Window.dispatchEventImpl (Unknown Source) 02:42 PM [SEVERE] at java.awt.Component.dispatchEvent (Unknown Source) 02:42 PM [SEVERE] at java.awt.EventQueue.dispatchEventImpl (Unknown Source) 02:42 PM [SEVERE] java.awt.EventQueue.access at $ 000 (Unknown Source) 02:42 PM [SEVERE] at java.awt.EventQueue $ 1.run (Unknown Source) 02:42 PM [SEVERE] at java.security.AccessController.doPrivileged (Native Method) 02:42 PM [SEVERE] at $ java.security.AccessControlContext 1.doIntersectionPrivilege (Unknown Source) 02:42 PM [SEVERE] at $ java.awt.EventQueue 2.Run (Unknown Source) 02:42 PM [SEVERE] at java.security.AccessController.doPrivileged (Native Method) 02:42 PM [SEVERE] at $ java.security.AccessControlContext 1.doIntersectionPrivilege (Unknown Source) 02:42 PM [SEVERE] at java.awt.EventQueue.dispatchEvent (Unknown Source) 02:42 PM [SEVERE] at java.awt.EventDispatchThread.pumpOneEventForFilters (Unknown Source) 02:42 PM [SEVERE] at java.awt.EventDispatchThread.pumpEventsForFilter (Unknown Source) 02:42 PM [SEVERE] at java.awt.EventDispatchThread.pumpEventsForHierarchy (Unknown Source) 02:42 PM [SEVERE] at java.awt.EventDispatchThread.pumpEvents (Unknown Source) 02:42 PM [SEVERE] at java.awt.EventDispatchThread.run (Unknown Source) 02:42 PM [SEVERE] Caused by: java.lang.NullPointerException 02:42 PM [SEVERE] at com.earth2me.essentials.Essentials.onCommandEssentials (Essentials.java: 271) 02:42 PM [SEVERE] at com.earth2me.essentials.Essentials.onCommand (Essentials.java: 264) 02:42 PM [SEVERE] at org.bukkit.command.PluginCommand.execute (PluginCommand.java: 40) 02:42 PM [SEVERE] ... 42 more Could post the other errors would be great, but I know not to spoiler. @edit OS : Windows 7 c x64 Java : 7