Occasionally created module with the same name and got the following: No message java.lang.NullPointerException at com.intellij.openapi.roots.ui.configuration.projectRoot.ModuleConfigurable.createOptionsPanel(ModuleConfigurable.java:9) at com.intellij.openapi.ui.NamedConfigurable.createComponent(NamedConfigurable.java:76) at com.intellij.openapi.ui.MasterDetailsComponent.updateSelection(MasterDetailsComponent.java:535) at com.intellij.openapi.roots.ui.configuration.projectRoot.ModuleStructureConfigurable.a(ModuleStructureConfigurable.java:123) at com.intellij.openapi.roots.ui.configuration.projectRoot.ModuleStructureConfigurable.updateSelection(ModuleStructureConfigurable.java:115) at com.intellij.openapi.ui.MasterDetailsComponent.updateSelectionFromTree(MasterDetailsComponent.java:181) at com.intellij.openapi.ui.MasterDetailsComponent.access$200(MasterDetailsComponent.java:61) at com.intellij.openapi.ui.MasterDetailsComponent$5.scrollToSource(MasterDetailsComponent.java:159) at com.intellij.ui.AutoScrollToSourceHandler$6.run(AutoScrollToSourceHandler.java:103) at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.run(LaterInvocator.java:20) at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209) at java.awt.EventQueue.dispatchEvent(EventQueue.java:597) at com.intellij.ide.IdeEventQueue.c(IdeEventQueue.java:212) at com.intellij.ide.IdeEventQueue.b(IdeEventQueue.java:205) at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:6) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:177) at java.awt.Dialog$1.run(Dialog.java:1039) at java.awt.Dialog$3.run(Dialog.java:1091) at java.security.AccessController.$$YJP$$doPrivileged(Native Method) at java.security.AccessController.doPrivileged(AccessController.java) at java.awt.Dialog.show(Dialog.java:1089) at com.intellij.openapi.ui.impl.DialogWrapperPeerImpl$MyDialog.show(DialogWrapperPeerImpl.java:48) at com.intellij.openapi.ui.impl.DialogWrapperPeerImpl.show(DialogWrapperPeerImpl.java:100) at com.intellij.openapi.ui.DialogWrapper.show(DialogWrapper.java:774) at com.intellij.ide.actions.ShowSettingsUtilImpl.showExplorerOptions(ShowSettingsUtilImpl.java:27) at com.intellij.ide.actions.ShowSettingsUtilImpl.showSettingsDialog(ShowSettingsUtilImpl.java:43) at com.intellij.ide.actions.ShowSettingsAction.actionPerformed(ShowSettingsAction.java:5) at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.a(IdeKeyEventDispatcher.java:211) at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.b(IdeKeyEventDispatcher.java:77) at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.dispatchKeyEvent(IdeKeyEventDispatcher.java:201) at com.intellij.ide.IdeEventQueue.b(IdeEventQueue.java:56) at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:6) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160) at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)