java.lang.AssertionError: Need to normalize D:\Program Files\NetBeans Dev 201203210400\.!
   at org.openide.filesystems.FileUtil.assertNormalized(FileUtil.java:140)
   at org.openide.filesystems.FileUtil.normalizeFile(FileUtil.java:1742)
   at org.openide.loaders.DataFolder$FolderNode.createNodeTransferable(DataFolder.java:1421)
   at org.openide.loaders.DataFolder$FolderNode.createPasteTypes(DataFolder.java:1402)
   at org.openide.nodes.AbstractNode.getPasteTypes(AbstractNode.java:543)
   at org.openide.nodes.FilterNode.getPasteTypes(FilterNode.java:696)
   at org.netbeans.spi.java.project.support.ui.PackageViewChildren$PackageNode.getPasteTypes(PackageViewChildren.java:798)
   at org.openide.nodes.FilterNode.getPasteTypes(FilterNode.java:696)
   at org.netbeans.modules.openide.explorer.ExplorerActionsImpl.updatePasteTypes(ExplorerActionsImpl.java:354)
   at org.netbeans.modules.openide.explorer.ExplorerActionsImpl.updatePasteAction(ExplorerActionsImpl.java:340)
   at org.netbeans.modules.openide.explorer.ExplorerActionsImpl.updateActions(ExplorerActionsImpl.java:281)
   at org.netbeans.modules.openide.explorer.ExplorerActionsImpl$ActionStateUpdater.run(ExplorerActionsImpl.java:761)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.AssertionError: Need to normalize D:\Program Files\NetBeans Dev 201203210400\.!
   at org.openide.util.RequestProcessor$Task.schedule(RequestProcessor.java:1493)
   at org.netbeans.modules.openide.explorer.ExplorerActionsImpl$ActionStateUpdater.schedule(ExplorerActionsImpl.java:793)
   at org.netbeans.modules.openide.explorer.ExplorerActionsImpl$ActionStateUpdater.flavorsChanged(ExplorerActionsImpl.java:752)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java:0)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
   at java.lang.reflect.Method.invoke(Method.java:601)
   at org.openide.util.WeakListenerImpl$ProxyListener.invoke(WeakListenerImpl.java:457)
   at $Proxy11.flavorsChanged(.java:0)
   at org.netbeans.NbClipboard.fireChange(NbClipboard.java:378)
   at org.netbeans.NbClipboard.run(NbClipboard.java:321)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1452)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2032)