java.lang.AssertionError
   at org.netbeans.core.startup.layers.ArchiveURLMapper.getURL(ArchiveURLMapper.java:86)
   at org.openide.filesystems.URLMapper.findURL(URLMapper.java:140)
   at org.netbeans.modules.refactoring.java.plugins.MoveFileRefactoringPlugin.checkProjectDeps(MoveFileRefactoringPlugin.java:435)
   at org.netbeans.modules.refactoring.java.plugins.MoveFileRefactoringPlugin.prepare(MoveFileRefactoringPlugin.java:574)
   at org.netbeans.modules.refactoring.api.AbstractRefactoring.pluginsPrepare2(AbstractRefactoring.java:442)
   at org.netbeans.modules.refactoring.api.AbstractRefactoring.pluginsPrepare(AbstractRefactoring.java:426)
   at org.netbeans.modules.refactoring.api.AbstractRefactoring.prepare(AbstractRefactoring.java:237)
   at org.netbeans.modules.refactoring.spi.impl.ParametersPanel$Prepare.run(ParametersPanel.java:1090)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1443)
   at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:68)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:303)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2058)