From 6.1 M2 latest build 200802250003

- start ide from fresh userdir
- create UML Sample App (exception occurs - issue 128347)
- exit ide
- start ide again, at or near the end of the scanning, the following error popped up.

java.lang.AssertionError: WARNING(please REPORT):  Externally deleted file:
C:\Users\peter\Documents\NetBeansProjects\UMLBankAppSample-Model\.QueryCache  (For additional information see:
http://wiki.netbeans.org/wiki/view/FileSystems)
	at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FileObjectFactory.printWarning(FileObjectFactory.java:178)
	at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FileObjectFactory.checkCacheState(FileObjectFactory.java:157)
	at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FileObjectFactory.checkCacheState(FileObjectFactory.java:144)
	at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FileObjectFactory.issueIfExist(FileObjectFactory.java:200)
	at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FileObjectFactory.findFileObject(FileObjectFactory.java:140)
	at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FileObjectFactory.findFileObject(FileObjectFactory.java:117)
	at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FileObjectFactory.findFileObject(FileObjectFactory.java:112)
	at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FolderObj.getFileObject(FolderObj.java:104)
	at org.openide.filesystems.FileUtil.createData(FileUtil.java:537)
	at org.openide.filesystems.FileUtil.createData(FileUtil.java:252)
	at org.netbeans.modules.uml.core.QueryManager.saveCache(QueryManager.java:647)
	at org.netbeans.modules.uml.core.QueryManager.createNewQueryCache(QueryManager.java:695)
	at org.netbeans.modules.uml.core.QueryManager.establishQueryCache(QueryManager.java:567)
	at org.netbeans.modules.uml.core.QueryManager.establishCache(QueryManager.java:1126)
	at org.netbeans.modules.uml.core.Application.openProject(Application.java:255)
	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.UMLProject$ProjectOpenedHookImpl.retreiveProject(UMLProject.java:526)
	at org.netbeans.modules.uml.project.UMLProject$ProjectOpenedHookImpl.verifyProjectIsInitialized(UMLProject.java:548)
	at org.netbeans.modules.uml.project.UMLProject$ProjectOpenedHookImpl.projectOpened(UMLProject.java:584)
	at org.netbeans.spi.project.ui.ProjectOpenedHook$1.projectOpened(ProjectOpenedHook.java:81)
	at org.netbeans.modules.project.ui.OpenProjectList.notifyOpened(OpenProjectList.java:911)
	at org.netbeans.modules.project.ui.OpenProjectList.access$900(OpenProjectList.java:124)
	at org.netbeans.modules.project.ui.OpenProjectList$LoadOpenProjects.loadOnBackground(OpenProjectList.java:330)
	at org.netbeans.modules.project.ui.OpenProjectList$LoadOpenProjects.run(OpenProjectList.java:259)
	at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:561)
[catch] at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:986)