java.lang.NullPointerException
        at org.netbeans.modules.j2ee.common.project.ui.J2eePlatformNode.<init>(J2eePlatformNode.java:117)
        at org.netbeans.modules.j2ee.common.project.ui.J2eePlatformNode.create(J2eePlatformNode.java:123)
        at org.netbeans.modules.j2ee.common.project.ui.LibrariesNode$LibrariesChildren.createNodes(LibrariesNode.java:332)
        at org.openide.nodes.Children$Keys$KE.nodes(Children.java:2249)
        at org.openide.nodes.ChildrenArray.nodesFor(ChildrenArray.java:167)
        at org.openide.nodes.Children$Info.nodes(Children.java:1295)
        at org.openide.nodes.Children.justComputeNodes(Children.java:774)
        at org.openide.nodes.ChildrenArray.nodes(ChildrenArray.java:96)
        at org.openide.nodes.Children.getNodes(Children.java:421)
        at org.openide.nodes.Children.findChild(Children.java:354)
        at org.openide.nodes.Children.getNodes(Children.java:487)
        at org.openide.nodes.FilterNode$Children.getNodes(FilterNode.java:1470)
        at org.openide.explorer.view.TreeView$2.run(TreeView.java:847)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:561)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:986)