java.lang.AssertionError
   at org.netbeans.modules.masterfs.filebasedfs.children.ChildrenSupport.addChild(ChildrenSupport.java:125)
   at org.netbeans.modules.masterfs.filebasedfs.children.ChildrenSupport.rescanChild(ChildrenSupport.java:183)
   at org.netbeans.modules.masterfs.filebasedfs.children.ChildrenSupport.getChild(ChildrenSupport.java:103)
   at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FolderObj$FolderChildrenCache.getChild(FolderObj.java:556)
   at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FileObjectFactory.getFileObject(FileObjectFactory.java:181)
   at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FileObjectFactory.getValidFileObject(FileObjectFactory.java:681)
   at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FolderObj.getFileObject(FolderObj.java:117)
   at org.openide.filesystems.FileUtil.createData(FileUtil.java:915)
   at org.openide.filesystems.FileUtil.createData(FileUtil.java:642)
   at org.netbeans.modules.j2ee.deployment.devmodules.api.AntDeploymentHelper.writeDeploymentScript(AntDeploymentHelper.java:114)
   at org.netbeans.modules.j2ee.common.project.ui.J2EEProjectProperties.createDeploymentScript(J2EEProjectProperties.java:184)
   at org.netbeans.modules.j2ee.common.project.ui.J2EEProjectProperties.updateServerProperties(J2EEProjectProperties.java:241)
   at org.netbeans.modules.j2ee.earproject.ui.customizer.EarProjectProperties$2.run(EarProjectProperties.java:396)
   at org.openide.util.Mutex.postRequest(Mutex.java:1253)
   at org.openide.util.Mutex.postWriteRequest(Mutex.java:582)
   at org.netbeans.modules.j2ee.earproject.ui.customizer.EarProjectProperties.setServerInstance(EarProjectProperties.java:389)
   at org.netbeans.modules.j2ee.earproject.EarProject$ProjectOpenedHookImpl.projectOpened(EarProject.java:492)
   at org.netbeans.spi.project.ui.ProjectOpenedHook$1.projectOpened(ProjectOpenedHook.java:81)
   at org.netbeans.spi.project.ui.support.UILookupMergerSupport$OpenHookImpl.projectOpened(UILookupMergerSupport.java:193)
   at org.netbeans.spi.project.ui.ProjectOpenedHook$1.projectOpened(ProjectOpenedHook.java:81)
   at org.netbeans.modules.project.ui.OpenProjectList.notifyOpened(OpenProjectList.java:1099)
   at org.netbeans.modules.project.ui.OpenProjectList.doOpenProject(OpenProjectList.java:1173)
   at org.netbeans.modules.project.ui.OpenProjectList.doOpen(OpenProjectList.java:697)
   at org.netbeans.modules.project.ui.OpenProjectList.open(OpenProjectList.java:610)
   at org.netbeans.modules.project.ui.OpenProjectList.open(OpenProjectList.java:546)
   at org.netbeans.modules.project.ui.OpenProjectsTrampolineImpl.openAPI(OpenProjectsTrampolineImpl.java:72)
   at org.netbeans.api.project.ui.OpenProjects.open(OpenProjects.java:169)
   at org.netbeans.modules.project.uiapi.DefaultProjectOperationsImplementation.open(DefaultProjectOperationsImplementation.java:747)
   at org.netbeans.modules.project.uiapi.DefaultProjectOperationsImplementation.doMoveProject(DefaultProjectOperationsImplementation.java:529)
   at org.netbeans.modules.project.uiapi.DefaultProjectOperationsImplementation$4.execute(DefaultProjectOperationsImplementation.java:359)
   at org.netbeans.modules.project.uiapi.DefaultProjectOperationsImplementation$6$1.run(DefaultProjectOperationsImplementation.java:638)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1415)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1954)