java.lang.IllegalStateException: Module org.netbeans.modules.java.source.base is already enabled at org.netbeans.ModuleManager.attachModuleFragment(ModuleManager.java:1019) at org.netbeans.ModuleManager.maybeAddToEnableList(ModuleManager.java:1585) at org.netbeans.ModuleManager.maybeAddToEnableList(ModuleManager.java:1595) at org.netbeans.ModuleManager.simulateEnable(ModuleManager.java:1534) at org.netbeans.ModuleManager.simulateEnable(ModuleManager.java:1508) at org.netbeans.core.startup.ModuleList.installNew(ModuleList.java:314) at org.netbeans.core.startup.ModuleList.access$2400(ModuleList.java:118) at org.netbeans.core.startup.ModuleList$Listener.stepEnable(ModuleList.java:1409) at org.netbeans.core.startup.ModuleList$Listener.access$1400(ModuleList.java:1007) at org.netbeans.core.startup.ModuleList$Listener$1.run(ModuleList.java:1231) at org.openide.filesystems.EventControl.runAtomicAction(EventControl.java:127) at org.openide.filesystems.FileSystem.runAtomicAction(FileSystem.java:499) at org.netbeans.core.startup.ModuleList$Listener.run(ModuleList.java:1207) Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.IllegalStateException: Module org.netbeans.modules.java.source.base is already enabled at org.openide.util.RequestProcessor$Task.schedule(RequestProcessor.java:1484) at org.netbeans.core.startup.ModuleList$Listener.runme(ModuleList.java:1200) at org.netbeans.core.startup.ModuleList$Listener.fileCreated0(ModuleList.java:1129) at org.netbeans.core.startup.ModuleList$Listener.fileDataCreated(ModuleList.java:1108) at sun.reflect.GeneratedMethodAccessor11.invoke(GeneratedMethodAccessor11.java:0) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:497) at org.openide.util.WeakListenerImpl$ProxyListener.invoke(WeakListenerImpl.java:487) at com.sun.proxy.$Proxy1.fileDataCreated(.java:0) at org.openide.filesystems.FCLSupport$DispatchEventWrapper.dispatchEventImpl(FCLSupport.java:172) at org.openide.filesystems.FCLSupport$DispatchEventWrapperSingle.dispatchAllEventsSync(FCLSupport.java:224) at org.openide.filesystems.FCLSupport$DispatchEventWrapper.dispatchEvent(FCLSupport.java:137) at org.openide.filesystems.FCLSupport.dispatchEvent(FCLSupport.java:105) at org.openide.filesystems.FileObject$ED.dispatch(FileObject.java:1388) at org.openide.filesystems.EventControl.invokeDispatchers(EventControl.java:213) at org.openide.filesystems.EventControl.exitAtomicAction(EventControl.java:188) at org.openide.filesystems.EventControl.runAtomicAction(EventControl.java:129) at org.openide.filesystems.FileSystem.runAtomicAction(FileSystem.java:499) at org.openide.filesystems.FileUtil.runAtomicAction(FileUtil.java:423) at org.netbeans.modules.autoupdate.pluginimporter.PluginImporter.refreshModuleList(PluginImporter.java:416) at org.netbeans.modules.autoupdate.pluginimporter.PluginImporter.importPlugins(PluginImporter.java:259) at org.netbeans.modules.autoupdate.pluginimporter.ImportManager.doImport(ImportManager.java:270) at org.netbeans.modules.autoupdate.pluginimporter.ImportManager.access$200(ImportManager.java:89) at org.netbeans.modules.autoupdate.pluginimporter.ImportManager$3$1.run(ImportManager.java:230) at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1443) at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:68) at org.openide.util.lookup.Lookups.executeWith(Lookups.java:303) at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2058)