java.lang.NullPointerException: This exception has no message.

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java.lang.NullPointerException:
at com.stc.egate.gui.projectexplorer.ProjectTree.buildSubMenu(ProjectTree.java:1913)
at com.stc.egate.gui.projectexplorer.ProjectTree.buildNewActions(ProjectTree.java:1848)
at com.stc.egate.gui.projectexplorer.ProjectTree.(ProjectTree.java:922)
at com.stc.egate.gui.projectexplorer.ProjectExplorer.createTree(ProjectExplorer.java:617)
at com.stc.egate.gui.projectexplorer.ProjectExplorer.init(ProjectExplorer.java:428)
at com.stc.egate.gui.projectexplorer.LoadExplorerAction.loadExplorer(LoadExplorerAction.java:90)
at com.stc.egate.gui.projectexplorer.LoadExplorerAction.performAction(LoadExplorerAction.java:76)
at com.stc.login.module.LaunchLoginAction.launchExplorer(LaunchLoginAction.java:208)
at com.stc.login.module.LaunchLoginAction.access$200(LaunchLoginAction.java:72)
at com.stc.login.module.LaunchLoginAction$3.construct(LaunchLoginAction.java:290)
at com.stc.login.module.SwingWorker$2.run(SwingWorker.java:124)
at java.lang.Thread.run(Thread.java:534)

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