java.lang.NullPointerException

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  • java.lang.NullPointerException at org.netbeans.api.visual.model.ObjectScene.setHoveredObject(ObjectScene.java:298) at org.netbeans.api.visual.model.ObjectScene$ObjectHoverProvider.widgetHovered(ObjectScene.java:557) at org.netbeans.modules.visual.action.MouseHoverAction.mouseExited(MouseHoverAction.java:76) at org.netbeans.api.visual.action.WidgetAction$Chain.mouseExited(WidgetAction.java:831) at org.netbeans.api.visual.widget.SceneComponent$Operator$5.operate(SceneComponent.java:577) at org.netbeans.api.visual.widget.SceneComponent.processLocationOperator(SceneComponent.java:336) at org.netbeans.api.visual.widget.SceneComponent.processLocationOperator(SceneComponent.java:291) at org.netbeans.api.visual.widget.SceneComponent.mouseExited(SceneComponent.java:175) at java.awt.Component.processMouseEvent(Component.java:6539) at javax.swing.JComponent.processMouseEvent(JComponent.java:3324) at java.awt.Component.processEvent(Component.java:6298) at java.awt.Container.processEvent(Container.java:2236) at java.awt.Component.dispatchEventImpl(Component.java:4889) at java.awt.Container.dispatchEventImpl(Container.java:2294) at java.awt.Component.dispatchEvent(Component.java:4711) at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4888) at java.awt.LightweightDispatcher.retargetMouseEnterExit(Container.java:4668) at java.awt.LightweightDispatcher.trackMouseEnterExit(Container.java:4654) at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4505) at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4466) at java.awt.Container.dispatchEventImpl(Container.java:2280) at java.awt.Window.dispatchEventImpl(Window.java:2746) at java.awt.Component.dispatchEvent(Component.java:4711) at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758) at java.awt.EventQueue.access$500(EventQueue.java:97) at java.awt.EventQueue$3.run(EventQueue.java:709) at java.awt.EventQueue$3.run(EventQueue.java:703) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76) at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86) at java.awt.EventQueue$4.run(EventQueue.java:731) at java.awt.EventQueue$4.run(EventQueue.java:729) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76) at java.awt.EventQueue.dispatchEvent(EventQueue.java:728) at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
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