java.io.IOException: /work/Software/NetBeans/openptk_modeling/RESTful_web_service/.QueryCache
        at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FileObj.getOutputStream(FileObj.java:82)
        at org.openide.filesystems.FileObject.getOutputStream(FileObject.java:623)
        at org.netbeans.modules.uml.core.support.umlsupport.XMLManip.save(XMLManip.java:1447)
        at org.netbeans.modules.uml.core.QueryManager.saveCache(QueryManager.java:649)
        at org.netbeans.modules.uml.core.QueryManager.createNewQueryCache(QueryManager.java:696)
        at org.netbeans.modules.uml.core.QueryManager.establishQueryCache(QueryManager.java:568)
        at org.netbeans.modules.uml.core.QueryManager.establishCache(QueryManager.java:1128)
        at org.netbeans.modules.uml.core.Application.openProject(Application.java:257)
        at org.netbeans.modules.uml.ui.products.ad.applicationcore.ADApplication.openProject(ADApplication.java:182)
        at org.netbeans.modules.uml.project.UMLProjectHelper.initializeProject(UMLProjectHelper.java:259)
        at org.netbeans.modules.uml.project.UMLProjectHelper.getProject(UMLProjectHelper.java:201)
        at org.netbeans.modules.uml.project.ui.nodes.UMLDiagramsRootNode.getModelElement(UMLDiagramsRootNode.java:189)
        at org.netbeans.modules.uml.project.ui.nodes.UMLModelElementNode.onElementDeleted(UMLModelElementNode.java:680)
        at sun.reflect.GeneratedMethodAccessor265.invoke(GeneratedMethodAccessor265.java:0)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:585)
        at org.netbeans.modules.uml.core.eventframework.EventFunctor.invokeMethod(EventFunctor.java:237)
        at org.netbeans.modules.uml.core.eventframework.EventFunctor.execute(EventFunctor.java:123)
        at org.netbeans.modules.uml.core.eventframework.EventManager.notifyListeners(EventManager.java:179)
        at org.netbeans.modules.uml.core.metamodel.core.foundation.ElementLifeTimeEventDispatcher.fireElementDeleted(ElementLifeTimeEventDispatcher.java:257)
        at org.netbeans.modules.uml.core.metamodel.core.foundation.VersionableElement.fireDelete(VersionableElement.java:669)
        at org.netbeans.modules.uml.core.metamodel.core.foundation.VersionableElement.fullDelete(VersionableElement.java:617)
        at org.netbeans.modules.uml.core.metamodel.core.foundation.VersionableElement.delete(VersionableElement.java:431)
        at org.netbeans.modules.uml.diagrams.actions.DeleteCompartmentWidgetAction.actionPerformed(DeleteCompartmentWidgetAction.java:104)
        at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1882)
        at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2202)
        at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420)
        at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258)
        at javax.swing.AbstractButton.doClick(AbstractButton.java:334)
        at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:1051)
        at apple.laf.CUIAquaMenuItem.doClick(CUIAquaMenuItem.java:119)
        at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:1092)
        at java.awt.Component.processMouseEvent(Component.java:5602)
        at javax.swing.JComponent.processMouseEvent(JComponent.java:3135)
        at java.awt.Component.processEvent(Component.java:5367)
        at java.awt.Container.processEvent(Container.java:2010)
        at java.awt.Component.dispatchEventImpl(Component.java:4068)
        at java.awt.Container.dispatchEventImpl(Container.java:2068)
        at java.awt.Component.dispatchEvent(Component.java:3903)
        at java.awt.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4256)
        at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:3936)
        at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.java:3866)
        at java.awt.Container.dispatchEventImpl(Container.java:2054)
        at java.awt.Window.dispatchEventImpl(Window.java:1801)
        at java.awt.Component.dispatchEvent(Component.java:3903)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
        at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:104)
        at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:269)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:190)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:184)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:176)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)