java.lang.AssertionError: memory://fs3//
   at org.openide.filesystems.FileObject.toURI(FileObject.java:1165)
   at org.netbeans.modules.projectapi.SimpleFileOwnerQueryImplementation.getOwner(SimpleFileOwnerQueryImplementation.java:145)
   at org.netbeans.api.project.FileOwnerQuery.getOwner(FileOwnerQuery.java:104)
   at org.netbeans.modules.project.uiapi.ProjectTemplateAttributesProvider.attributesFor(ProjectTemplateAttributesProvider.java:76)
   at org.openide.loaders.DataObject$CreateAction.findParameters(DataObject.java:1399)
   at org.openide.loaders.MultiDataObject.handleCreateFromTemplate(MultiDataObject.java:816)
   at org.openide.loaders.DataObject$CreateAction.run(DataObject.java:1385)
   at org.openide.loaders.DataObjectPool$1WrapAtomicAction.run(DataObjectPool.java:261)
   at org.openide.filesystems.EventControl.runAtomicAction(EventControl.java:127)
   at org.openide.filesystems.FileSystem.runAtomicAction(FileSystem.java:566)
   at org.openide.loaders.DataObjectPool.runAtomicAction(DataObjectPool.java:273)
   at org.openide.loaders.DataObject.invokeAtomicAction(DataObject.java:906)
   at org.openide.loaders.DataObject.createFromTemplate(DataObject.java:838)
   at org.openide.loaders.DataObject.createFromTemplate(DataObject.java:818)
   at org.openide.loaders.DataObject.createFromTemplate(DataObject.java:803)
   at org.netbeans.api.java.source.WorkingCopy.doCreateFromTemplate(WorkingCopy.java:623)
   at org.netbeans.api.java.source.WorkingCopy.processExternalCUs(WorkingCopy.java:562)
   at org.netbeans.api.java.source.WorkingCopy.getChanges(WorkingCopy.java:665)
   at org.netbeans.api.java.source.JavaSource$1.run(JavaSource.java:668)
   at org.netbeans.api.java.source.JavaSource$1.run(JavaSource.java:655)
   at org.netbeans.api.java.source.JavaSource$MultiTask.run(JavaSource.java:482)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callUserTask(TaskProcessor.java:643)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:154)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:138)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:211)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:208)
   at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:168)
   at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:356)
   at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:71)
   at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:208)
   at org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:106)
   at org.netbeans.api.java.source.JavaSource.runUserActionTaskImpl(JavaSource.java:432)
   at org.netbeans.api.java.source.JavaSource.runUserActionTask(JavaSource.java:403)
   at org.netbeans.api.java.source.JavaSource.runModificationTask(JavaSource.java:676)
   at org.netbeans.modules.refactoring.java.spi.JavaRefactoringPlugin.processFiles(JavaRefactoringPlugin.java:242)
   at org.netbeans.modules.refactoring.java.spi.JavaRefactoringPlugin.createAndAddElements(JavaRefactoringPlugin.java:252)
   at org.netbeans.modules.refactoring.java.spi.JavaRefactoringPlugin.createAndAddElements(JavaRefactoringPlugin.java:268)
   at org.netbeans.modules.refactoring.java.plugins.InnerToOuterRefactoringPlugin.prepare(InnerToOuterRefactoringPlugin.java:190)
   at org.netbeans.modules.refactoring.api.AbstractRefactoring.pluginsPrepare2(AbstractRefactoring.java:421)
   at org.netbeans.modules.refactoring.api.AbstractRefactoring.pluginsPrepare(AbstractRefactoring.java:405)
   at org.netbeans.modules.refactoring.api.AbstractRefactoring.prepare(AbstractRefactoring.java:219)
   at org.netbeans.modules.refactoring.spi.impl.ParametersPanel$Prepare.run(ParametersPanel.java:984)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1404)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1984)