Stacktrace:
java.lang.NullPointerException
at org.uml.explorer.ExplorerTopComponent.isUMLTopComponent(ExplorerTopComponent.java:298)
at org.uml.explorer.ExplorerTopComponent.isActivatedLinkedTC(ExplorerTopComponent.java:246)
at org.uml.explorer.ExplorerTopComponent.updateWhenEmpty(ExplorerTopComponent.java:152)
at org.uml.explorer.ExplorerTopComponent.componentDeactivated(ExplorerTopComponent.java:147)
at org.openide.windows.WindowManager.activateComponent(WindowManager.java:279)
at org.netbeans.core.windows.WindowManagerImpl.notifyRegistryTopComponentActivated(WindowManagerImpl.java:1171)
See https://netbeans.org/bugzilla/show_bug.cgi?id=262641
Stacktrace: java.lang.NullPointerException at org.uml.explorer.ExplorerTopComponent.isUMLTopComponent(ExplorerTopComponent.java:298) at org.uml.explorer.ExplorerTopComponent.isActivatedLinkedTC(ExplorerTopComponent.java:246) at org.uml.explorer.ExplorerTopComponent.updateWhenEmpty(ExplorerTopComponent.java:152) at org.uml.explorer.ExplorerTopComponent.componentDeactivated(ExplorerTopComponent.java:147) at org.openide.windows.WindowManager.activateComponent(WindowManager.java:279) at org.netbeans.core.windows.WindowManagerImpl.notifyRegistryTopComponentActivated(WindowManagerImpl.java:1171)