null when invoking onBeginDrag(IProjectTreeControl, IProjectTreeItem;, IProjectT reeDragVerify, IResultCell) on org.netbeans.modules.uml.requirements.ReqEventsSi nk with parameters: null, IProjectTreeItem;, ProjectTreeDragVerifyImpl, ResultCe ll null when invoking onBeginDrag(IProjectTreeControl, IProjectTreeItem;, IProjectT reeDragVerify, IResultCell) on org.netbeans.modules.uml.designpattern.CatalogEve ntSink with parameters: null, IProjectTreeItem;, ProjectTreeDragVerifyImpl, Resu ltCell null when invoking onBeginDrag(IProjectTreeControl, IProjectTreeItem;, IProjectT reeDragVerify, IResultCell) on org.netbeans.modules.uml.requirements.ReqEventsSi nk with parameters: null, IProjectTreeItem;, ProjectTreeDragVerifyImpl, ResultCe ll null when invoking onBeginDrag(IProjectTreeControl, IProjectTreeItem;, IProjectT reeDragVerify, IResultCell) on org.netbeans.modules.uml.designpattern.CatalogEve ntSink with parameters: null, IProjectTreeItem;, ProjectTreeDragVerifyImpl, Resu ltCell java.lang.reflect.InvocationTargetException at sun.reflect.GeneratedMethodAccessor102.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces sorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.netbeans.modules.uml.core.eventframework.EventFunctor.invokeMetho d(EventFunctor.java:237) at org.netbeans.modules.uml.core.eventframework.EventFunctor.execute(Eve ntFunctor.java:123) at org.netbeans.modules.uml.core.eventframework.EventManager.notifyListe ners(EventManager.java:184) at org.netbeans.modules.uml.ui.controls.projecttree.ProjectTreeEventDisp atcherImpl.fireBeginDrag(ProjectTreeEventDispatcherImpl.java:473) at org.netbeans.modules.uml.project.ui.nodes.AbstractModelElementNode.cl ipboardCopy(AbstractModelElementNode.java:479) at org.netbeans.modules.uml.project.ui.nodes.AbstractModelElementNode.cl ipboardCut(AbstractModelElementNode.java:489) at org.openide.nodes.FilterNode.clipboardCut(FilterNode.java:632) at org.openide.explorer.view.DragDropUtilities.getNodeTransferable(DragD ropUtilities.java:132) at org.openide.explorer.view.ExplorerDragSupport.dragGestureRecognized(E xplorerDragSupport.java:135) at org.openide.explorer.view.TreeViewDragSupport.dragGestureRecognized(T reeViewDragSupport.java:89) at java.awt.dnd.DragGestureRecognizer.fireDragGestureRecognized(DragGest ureRecognizer.java:339) at sun.awt.windows.WMouseDragGestureRecognizer.mouseDragged(WMouseDragGe stureRecognizer.java:202) at java.awt.AWTEventMulticaster.mouseDragged(AWTEventMulticaster.java:30 3) at java.awt.AWTEventMulticaster.mouseDragged(AWTEventMulticaster.java:30 2) at java.awt.AWTEventMulticaster.mouseDragged(AWTEventMulticaster.java:30 2) at java.awt.Component.processMouseMotionEvent(Component.java:6089) at javax.swing.JComponent.processMouseMotionEvent(JComponent.java:3283) at java.awt.Component.processEvent(Component.java:5810) at java.awt.Container.processEvent(Container.java:2058) at java.awt.Component.dispatchEventImpl(Component.java:4413) at java.awt.Container.dispatchEventImpl(Container.java:2116) at java.awt.Component.dispatchEvent(Component.java:4243) at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4322 ) at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4003) at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3916) at java.awt.Container.dispatchEventImpl(Container.java:2102) at java.awt.Window.dispatchEventImpl(Window.java:2440) at java.awt.Component.dispatchEvent(Component.java:4243) at java.awt.EventQueue.dispatchEvent(EventQueue.java:599) at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.j ava:104) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThre ad.java:273) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread. java:183) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThre ad.java:173) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160) at java.awt.EventDispatchThread.run(EventDispatchThread.java:121) Caused by: java.lang.IllegalArgumentException at org.netbeans.modules.uml.requirements.ReqEventsSink.onBeginDrag(ReqEv entsSink.java:354) ... 39 more java.lang.reflect.InvocationTargetException at sun.reflect.GeneratedMethodAccessor102.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces sorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.netbeans.modules.uml.core.eventframework.EventFunctor.invokeMetho d(EventFunctor.java:237) at org.netbeans.modules.uml.core.eventframework.EventFunctor.execute(Eve ntFunctor.java:123) at org.netbeans.modules.uml.core.eventframework.EventManager.notifyListe ners(EventManager.java:184) at org.netbeans.modules.uml.ui.controls.projecttree.ProjectTreeEventDisp atcherImpl.fireBeginDrag(ProjectTreeEventDispatcherImpl.java:473) at org.netbeans.modules.uml.project.ui.nodes.AbstractModelElementNode.cl ipboardCopy(AbstractModelElementNode.java:479) at org.netbeans.modules.uml.project.ui.nodes.AbstractModelElementNode.cl ipboardCut(AbstractModelElementNode.java:489) at org.openide.nodes.FilterNode.clipboardCut(FilterNode.java:632) at org.openide.explorer.view.DragDropUtilities.getNodeTransferable(DragD ropUtilities.java:132) at org.openide.explorer.view.ExplorerDragSupport.dragGestureRecognized(E xplorerDragSupport.java:135) at org.openide.explorer.view.TreeViewDragSupport.dragGestureRecognized(T reeViewDragSupport.java:89) at java.awt.dnd.DragGestureRecognizer.fireDragGestureRecognized(DragGest ureRecognizer.java:339) at sun.awt.windows.WMouseDragGestureRecognizer.mouseDragged(WMouseDragGe stureRecognizer.java:202) at java.awt.AWTEventMulticaster.mouseDragged(AWTEventMulticaster.java:30 3) at java.awt.AWTEventMulticaster.mouseDragged(AWTEventMulticaster.java:30 2) at java.awt.AWTEventMulticaster.mouseDragged(AWTEventMulticaster.java:30 2) at java.awt.Component.processMouseMotionEvent(Component.java:6089) at javax.swing.JComponent.processMouseMotionEvent(JComponent.java:3283) at java.awt.Component.processEvent(Component.java:5810) at java.awt.Container.processEvent(Container.java:2058) at java.awt.Component.dispatchEventImpl(Component.java:4413) at java.awt.Container.dispatchEventImpl(Container.java:2116) at java.awt.Component.dispatchEvent(Component.java:4243) at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4322 ) at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4003) at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3916) at java.awt.Container.dispatchEventImpl(Container.java:2102) at java.awt.Window.dispatchEventImpl(Window.java:2440) at java.awt.Component.dispatchEvent(Component.java:4243) at java.awt.EventQueue.dispatchEvent(EventQueue.java:599) at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.j ava:104) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThre ad.java:273) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread. java:183) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThre ad.java:173) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160) at java.awt.EventDispatchThread.run(EventDispatchThread.java:121) Caused by: java.lang.NullPointerException at org.netbeans.modules.uml.designpattern.CatalogEventSink.onBeginDrag(C atalogEventSink.java:161) ... 39 more java.lang.reflect.InvocationTargetException at sun.reflect.GeneratedMethodAccessor102.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces sorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.netbeans.modules.uml.core.eventframework.EventFunctor.invokeMetho d(EventFunctor.java:237) at org.netbeans.modules.uml.core.eventframework.EventFunctor.execute(Eve ntFunctor.java:123) at org.netbeans.modules.uml.core.eventframework.EventManager.notifyListe ners(EventManager.java:184) at org.netbeans.modules.uml.ui.controls.projecttree.ProjectTreeEventDisp atcherImpl.fireBeginDrag(ProjectTreeEventDispatcherImpl.java:473) at org.netbeans.modules.uml.project.ui.nodes.AbstractModelElementNode.cl ipboardCopy(AbstractModelElementNode.java:479) at org.openide.nodes.AbstractNode.drag(AbstractNode.java:487) at org.openide.nodes.FilterNode.drag(FilterNode.java:650) at org.openide.explorer.view.DragDropUtilities.getNodeTransferable(DragD ropUtilities.java:134) at org.openide.explorer.view.ExplorerDragSupport.dragGestureRecognized(E xplorerDragSupport.java:139) at org.openide.explorer.view.TreeViewDragSupport.dragGestureRecognized(T reeViewDragSupport.java:89) at java.awt.dnd.DragGestureRecognizer.fireDragGestureRecognized(DragGest ureRecognizer.java:339) at sun.awt.windows.WMouseDragGestureRecognizer.mouseDragged(WMouseDragGe stureRecognizer.java:202) at java.awt.AWTEventMulticaster.mouseDragged(AWTEventMulticaster.java:30 3) at java.awt.AWTEventMulticaster.mouseDragged(AWTEventMulticaster.java:30 2) at java.awt.AWTEventMulticaster.mouseDragged(AWTEventMulticaster.java:30 2) at java.awt.Component.processMouseMotionEvent(Component.java:6089) at javax.swing.JComponent.processMouseMotionEvent(JComponent.java:3283) at java.awt.Component.processEvent(Component.java:5810) at java.awt.Container.processEvent(Container.java:2058) at java.awt.Component.dispatchEventImpl(Component.java:4413) at java.awt.Container.dispatchEventImpl(Container.java:2116) at java.awt.Component.dispatchEvent(Component.java:4243) at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4322 ) at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4003) at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3916) at java.awt.Container.dispatchEventImpl(Container.java:2102) at java.awt.Window.dispatchEventImpl(Window.java:2440) at java.awt.Component.dispatchEvent(Component.java:4243) at java.awt.EventQueue.dispatchEvent(EventQueue.java:599) at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.j ava:104) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThre ad.java:273) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread. java:183) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThre ad.java:173) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160) at java.awt.EventDispatchThread.run(EventDispatchThread.java:121) Caused by: java.lang.IllegalArgumentException at org.netbeans.modules.uml.requirements.ReqEventsSink.onBeginDrag(ReqEv entsSink.java:354) ... 39 more java.lang.reflect.InvocationTargetException at sun.reflect.GeneratedMethodAccessor102.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces sorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.netbeans.modules.uml.core.eventframework.EventFunctor.invokeMetho d(EventFunctor.java:237) at org.netbeans.modules.uml.core.eventframework.EventFunctor.execute(Eve ntFunctor.java:123) at org.netbeans.modules.uml.core.eventframework.EventManager.notifyListe ners(EventManager.java:184) at org.netbeans.modules.uml.ui.controls.projecttree.ProjectTreeEventDisp atcherImpl.fireBeginDrag(ProjectTreeEventDispatcherImpl.java:473) at org.netbeans.modules.uml.project.ui.nodes.AbstractModelElementNode.cl ipboardCopy(AbstractModelElementNode.java:479) at org.openide.nodes.AbstractNode.drag(AbstractNode.java:487) at org.openide.nodes.FilterNode.drag(FilterNode.java:650) at org.openide.explorer.view.DragDropUtilities.getNodeTransferable(DragD ropUtilities.java:134) at org.openide.explorer.view.ExplorerDragSupport.dragGestureRecognized(E xplorerDragSupport.java:139) at org.openide.explorer.view.TreeViewDragSupport.dragGestureRecognized(T reeViewDragSupport.java:89) at java.awt.dnd.DragGestureRecognizer.fireDragGestureRecognized(DragGest ureRecognizer.java:339) at sun.awt.windows.WMouseDragGestureRecognizer.mouseDragged(WMouseDragGe stureRecognizer.java:202) at java.awt.AWTEventMulticaster.mouseDragged(AWTEventMulticaster.java:30 3) at java.awt.AWTEventMulticaster.mouseDragged(AWTEventMulticaster.java:30 2) at java.awt.AWTEventMulticaster.mouseDragged(AWTEventMulticaster.java:30 2) at java.awt.Component.processMouseMotionEvent(Component.java:6089) at javax.swing.JComponent.processMouseMotionEvent(JComponent.java:3283) at java.awt.Component.processEvent(Component.java:5810) at java.awt.Container.processEvent(Container.java:2058) at java.awt.Component.dispatchEventImpl(Component.java:4413) at java.awt.Container.dispatchEventImpl(Container.java:2116) at java.awt.Component.dispatchEvent(Component.java:4243) at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4322 ) at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4003) at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3916) at java.awt.Container.dispatchEventImpl(Container.java:2102) at java.awt.Window.dispatchEventImpl(Window.java:2440) at java.awt.Component.dispatchEvent(Component.java:4243) at java.awt.EventQueue.dispatchEvent(EventQueue.java:599) at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.j ava:104) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThre ad.java:273) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread. java:183) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThre ad.java:173) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160) at java.awt.EventDispatchThread.run(EventDispatchThread.java:121) Caused by: java.lang.NullPointerException at org.netbeans.modules.uml.designpattern.CatalogEventSink.onBeginDrag(C atalogEventSink.java:161) ... 39 more SELECT NEED TO SET AT LEAST MIN SIZE SELECT IN MIN SIZE MODE