java.io.FileNotFoundException: FileObject MasterFileObject[/home/karol/HOL/MobileApplication1/src/org/javaone/hol/ui/WebToMobileClient.wsclient@37cb30:7ce49c,valid=false] is not valid.
   at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FileObj.getOutputStream(FileObj.java:94)
   at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FileObj.getOutputStream(FileObj.java:89)
   at org.netbeans.modules.xml.multiview.XmlMultiViewDataObject$DataCache.saveData(XmlMultiViewDataObject.java:452)
   at org.netbeans.modules.xml.multiview.XmlMultiViewEditorSupport.saveDocument(XmlMultiViewEditorSupport.java:253)
   at org.netbeans.modules.xml.multiview.XmlMultiViewDataObject$1.save(XmlMultiViewDataObject.java:102)
   at org.netbeans.core.NbLifecycleManager.saveAll(NbLifecycleManager.java:90)
   at org.netbeans.modules.refactoring.spi.impl.RefactoringPanel.refresh(RefactoringPanel.java:567)
   at org.netbeans.modules.refactoring.spi.impl.RefactoringPanel.<init>(RefactoringPanel.java:137)
   at org.netbeans.modules.refactoring.spi.impl.RefactoringPanel.<init>(RefactoringPanel.java:129)
   at org.netbeans.modules.refactoring.spi.ui.UI.openRefactoringUI(UI.java:75)
   at org.netbeans.modules.refactoring.java.ui.RefactoringActionsProvider$NodeToFileObjectTask.run(RefactoringActionsProvider.java:878)
   at org.netbeans.modules.refactoring.java.RetoucheUtils.invokeAfterScanFinished(RetoucheUtils.java:974)
   at org.netbeans.modules.refactoring.java.ui.RefactoringActionsProvider.doDelete(RefactoringActionsProvider.java:453)
   at org.netbeans.modules.refactoring.api.impl.ActionsImplementationFactory.doDelete(ActionsImplementationFactory.java:135)
   at org.netbeans.modules.refactoring.spi.impl.SafeDeleteAction.performAction(SafeDeleteAction.java:82)
   at org.netbeans.modules.refactoring.spi.impl.RefactoringGlobalAction.performAction(RefactoringGlobalAction.java:135)
   at org.netbeans.modules.refactoring.spi.impl.SafeDeleteAction$1.run(SafeDeleteAction.java:129)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:137)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)