java.io.FileNotFoundException: FileObject D:\_MARCO\NetBeansProjects\LudoRace-Model1\.QueryCache is not valid.
   at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FileObj.getOutputStream(FileObj.java:92)
   at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FileObj.getOutputStream(FileObj.java:87)
   at org.openide.filesystems.FileObject.getOutputStream(FileObject.java:685)
   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.saveCRCs(QueryManager.java:360)
   at org.netbeans.modules.uml.core.QueryManager.closeCache(QueryManager.java:1136)
   at org.netbeans.modules.uml.core.metamodel.structure.Project.close(Project.java:1756)
   at org.netbeans.modules.uml.core.Application.closeProject(Application.java:430)
   at org.netbeans.modules.uml.ui.products.ad.applicationcore.ADApplication.closeProject(ADApplication.java:217)
   at org.netbeans.modules.uml.project.UMLProjectHelper.closeProject(UMLProjectHelper.java:331)
   at org.netbeans.modules.uml.project.UMLProject$ProjectOpenedHookImpl.projectClosed(UMLProject.java:676)
   at org.netbeans.spi.project.ui.ProjectOpenedHook$1.projectClosed(ProjectOpenedHook.java:84)
   at org.netbeans.modules.project.ui.OpenProjectList.notifyClosed(OpenProjectList.java:1095)
   at org.netbeans.modules.project.ui.OpenProjectList.access$1300(OpenProjectList.java:129)
   at org.netbeans.modules.project.ui.OpenProjectList$5.run(OpenProjectList.java:790)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:641)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1123)