java.lang.AssertionError: Owner project for file:C:\Users\barboni\Documents\NetBeansProjects\ICS\ICS_site\site\src\site\apt\softwares\hamsters\download.apt@9012005c:6048f6a9 prj:Maven[C:\Users\barboni\Documents\NetBeansProjects\ICS\ICS_site\site\pom.xml]
   at org.netbeans.modules.project.ui.ProjectUtilities$1.doClose(ProjectUtilities.java:174)
   at org.netbeans.modules.project.ui.ProjectUtilities$1.close(ProjectUtilities.java:141)
   at org.netbeans.modules.project.ui.ProjectUtilities.closeAllDocuments(ProjectUtilities.java:505)
   at org.netbeans.modules.project.ui.OpenProjectList.close(OpenProjectList.java:898)
   at org.netbeans.modules.project.ui.OpenProjectList.close(OpenProjectList.java:882)
   at org.netbeans.modules.project.ui.OpenProjectsTrampolineImpl.closeAPI(OpenProjectsTrampolineImpl.java:85)
   at org.netbeans.api.project.ui.OpenProjects.close(OpenProjects.java:257)
   at org.netbeans.modules.project.ui.actions.CloseAllProjectsAction$1.run(CloseAllProjectsAction.java:80)
   at org.openide.util.RequestProcessor$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$Processor.run(RequestProcessor.java:2058)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.AssertionError: Owner project for file:C:\Users\barboni\Documents\NetBeansProjects\ICS\ICS_site\site\src\site\apt\softwares\hamsters\download.apt@9012005c:6048f6a9 prj:Maven[C:\Users\barboni\Documents\NetBeansProjects\ICS\ICS_site\site\pom.xml]
   at org.openide.util.RequestProcessor.post(RequestProcessor.java:420)
   at org.netbeans.modules.project.ui.actions.CloseAllProjectsAction.actionPerformed(CloseAllProjectsAction.java:73)
   at org.openide.awt.AlwaysEnabledAction$1.run(AlwaysEnabledAction.java:199)
   at org.openide.util.actions.ActionInvoker$1.run(ActionInvoker.java:95)
   at org.openide.util.actions.ActionInvoker.doPerformAction(ActionInvoker.java:116)
   at org.openide.util.actions.ActionInvoker.invokeAction(ActionInvoker.java:99)
   at org.openide.awt.AlwaysEnabledAction.actionPerformed(AlwaysEnabledAction.java:202)
   at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
   at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)
   at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
   at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
   at javax.swing.AbstractButton.doClick(AbstractButton.java:376)
   at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:833)
   at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:877)
   at java.awt.Component.processMouseEvent(Component.java:6533)
   at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
   at java.awt.Component.processEvent(Component.java:6298)
   at java.awt.Container.processEvent(Container.java:2237)
   at java.awt.Component.dispatchEventImpl(Component.java:4889)
   at java.awt.Container.dispatchEventImpl(Container.java:2295)
   at java.awt.Component.dispatchEvent(Component.java:4711)
   at java.awt.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4889)
   at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:4526)
   at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.java:4467)
   at java.awt.Container.dispatchEventImpl(Container.java:2281)
   at java.awt.Window.dispatchEventImpl(Window.java:2746)
   at java.awt.Component.dispatchEvent(Component.java:4711)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
   at java.awt.EventQueue.access$500(EventQueue.java:97)
   at java.awt.EventQueue$3.run(EventQueue.java:709)
   at java.awt.EventQueue$3.run(EventQueue.java:703)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
   at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:90)
   at java.awt.EventQueue$4.run(EventQueue.java:731)
   at java.awt.EventQueue$4.run(EventQueue.java:729)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)