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

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java.lang.NullPointerException:
at oracle.ewt.scrolling.arrowBox.ArrowBox.removeAdjustmentListener(Unknown Source)
at oracle.oats.scripting.modules.applet.helper.observer.CompositeAwtEventListener$4.run(CompositeAwtEventListener.java:260)
at oracle.oats.scripting.modules.applet.helper.observer.CompositeAwtEventListener.installListeners(CompositeAwtEventListener.java:390)
at oracle.oats.scripting.modules.applet.helper.observer.SwingListenerMgr$CompositeSwingEventListener.superInstallListeners(SwingListenerMgr.java:1791)
at oracle.oats.scripting.modules.applet.helper.observer.SwingListenerMgr$CompositeSwingEventListener.access$100(SwingListenerMgr.java:315)
at oracle.oats.scripting.modules.applet.helper.observer.SwingListenerMgr$CompositeSwingEventListener$2.run(SwingListenerMgr.java:537)
at oracle.oats.scripting.modules.applet.helper.observer.SwingListenerMgr$CompositeSwingEventListener.installListeners(SwingListenerMgr.java:970)
at oracle.oats.scripting.modules.applet.helper.observer.CompositeAwtEventListener$4.run(CompositeAwtEventListener.java:380)
at oracle.oats.scripting.modules.applet.helper.observer.CompositeAwtEventListener.installListeners(CompositeAwtEventListener.java:390)
at oracle.oats.scripting.modules.applet.helper.observer.SwingListenerMgr$CompositeSwingEventListener.superInstallListeners(SwingListenerMgr.java:1791)
at oracle.oats.scripting.modules.applet.helper.observer.SwingListenerMgr$CompositeSwingEventListener.access$100(SwingListenerMgr.java:315)
at oracle.oats.scripting.modules.applet.helper.observer.SwingListenerMgr$CompositeSwingEventListener$2.run(SwingListenerMgr.java:537)
at oracle.oats.scripting.modules.applet.helper.observer.SwingListenerMgr$CompositeSwingEventListener.installListeners(SwingListenerMgr.java:970)
at oracle.oats.scripting.modules.applet.helper.observer.CompositeAwtEventListener$4.run(CompositeAwtEventListener.java:380)
at oracle.oats.scripting.modules.applet.helper.observer.CompositeAwtEventListener.installListeners(CompositeAwtEventListener.java:390)
at oracle.oats.scripting.modules.applet.helper.observer.SwingListenerMgr$CompositeSwingEventListener.superInstallListeners(SwingListenerMgr.java:1791)
at oracle.oats.scripting.modules.applet.helper.observer.SwingListenerMgr$CompositeSwingEventListener.access$100(SwingListenerMgr.java:315)
at oracle.oats.scripting.modules.applet.helper.observer.SwingListenerMgr$CompositeSwingEventListener$2.run(SwingListenerMgr.java:537)
at oracle.oats.scripting.modules.applet.helper.observer.SwingListenerMgr$CompositeSwingEventListener.installListeners(SwingListenerMgr.java:970)
at oracle.oats.scripting.modules.applet.helper.observer.CompositeAwtEventListener$4.run(CompositeAwtEventListener.java:380)
at oracle.oats.scripting.modules.applet.helper.observer.CompositeAwtEventListener.installListeners(CompositeAwtEventListener.java:390)
at oracle.oats.scripting.modules.applet.helper.observer.SwingListenerMgr$CompositeSwingEventListener.superInstallListeners(SwingListenerMgr.java:1791)
at oracle.oats.scripting.modules.applet.helper.observer.SwingListenerMgr$CompositeSwingEventListener.access$100(SwingListenerMgr.java:315)
at oracle.oats.scripting.modules.applet.helper.observer.SwingListenerMgr$CompositeSwingEventListener$2.run(SwingListenerMgr.java:537)
at oracle.oats.scripting.modules.applet.helper.observer.SwingListenerMgr$CompositeSwingEventListener.installListeners(SwingListenerMgr.java:970)
at oracle.oats.scripting.modules.applet.helper.observer.CompositeAwtEventListener$3.run(CompositeAwtEventListener.java:179)
at oracle.oats.scripting.modules.applet.helper.observer.CompositeAwtEventListener.installListeners(CompositeAwtEventListener.java:194)
at oracle.oats.scripting.modules.applet.helper.observer.SwingListenerMgr$CompositeSwingEventListener.superInstallListeners(SwingListenerMgr.java:1786)
at oracle.oats.scripting.modules.applet.helper.observer.SwingListenerMgr$CompositeSwingEventListener.access$000(SwingListenerMgr.java:315)
at oracle.oats.scripting.modules.applet.helper.observer.SwingListenerMgr$CompositeSwingEventListener$1.run(SwingListenerMgr.java:506)
at oracle.oats.scripting.modules.applet.helper.observer.SwingListenerMgr$CompositeSwingEventListener.installListeners(SwingListenerMgr.java:515)
at oracle.oats.scripting.modules.applet.helper.observer.CompositeAwtEventListener.componentAdded(CompositeAwtEventListener.java:730)
at java.awt.AWTEventMulticaster.componentAdded(Unknown Source)
at java.awt.Container.processContainerEvent(Unknown Source)
at oracle.ewt.lwAWT.LWComponent.processEventImpl(Unknown Source)
at oracle.ewt.lwAWT.lwWindow.DesktopContainer.processEventImpl(Unknown Source)
at oracle.ewt.lwAWT.LWComponent.redispatchEvent(Unknown Source)
at oracle.ewt.lwAWT.LWComponent.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.Container.addImpl(Unknown Source)
at oracle.ewt.lwAWT.LWComponent.addImpl(Unknown Source)
at java.awt.Container.add(Unknown Source)
at oracle.ewt.lwAWT.lwWindow.DesktopContainer.setWindowPosition(Unknown Source)
at oracle.ewt.lwAWT.lwWindow.LWWindow._moveToFront(Unknown Source)
at oracle.ewt.lwAWT.lwWindow.LWWindow.setActive(Unknown Source)
at oracle.ewt.lwAWT.lwWindow.LWWindow.setVisible(Unknown Source)
at oracle.forms.ui.ExtendedFrame.setVisible(Unknown Source)
at oracle.ewt.lwAWT.lwWindow.LWWindow.setVisible(Unknown Source)
at oracle.forms.handler.FormWindow.doShowComponent(Unknown Source)
at oracle.forms.handler.UICommon.onComponentUpdate(Unknown Source)
at oracle.forms.handler.UICommon.onUpdate(Unknown Source)
at oracle.forms.handler.FormWindow.onUpdate(Unknown Source)
at oracle.forms.handler.UICommon.onUpdate(Unknown Source)
at oracle.forms.engine.Runform.onUpdateHandler(Unknown Source)
at oracle.forms.engine.Runform.processMessage_C(Unknown Source)
at oracle.forms.engine.Runform.processMessage(Unknown Source)
at oracle.forms.engine.Runform.processSet(Unknown Source)
at oracle.forms.engine.Runform.onMessageReal(Unknown Source)
at oracle.forms.engine.Runform.onMessage_C(Unknown Source)
at oracle.forms.engine.Runform.onMessage(Unknown Source)
at oracle.forms.engine.Runform.processEventEnd(Unknown Source)
at oracle.ewt.lwAWT.LWComponent.redispatchEvent(Unknown Source)
at oracle.ewt.lwAWT.LWComponent.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at oracle.forms.engine.Main.dispatchEvents(Unknown Source)
at oracle.forms.engine.Main.tryDispatching(Unknown Source)
at oracle.forms.engine.Main.componentResized(Unknown Source)
at java.awt.Component.processComponentEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at oracle.ewt.lwAWT.BufferedApplet.processEventImpl(Unknown Source)
at oracle.ewt.lwAWT.BufferedApplet.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$000(Unknown Source)
at java.awt.EventQueue$1.run(Unknown Source)
at java.awt.EventQueue$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$2.run(Unknown Source)
at java.awt.EventQueue$2.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)

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