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

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java.lang.NullPointerException:
at com.sun.sql.rowset.CachedRowSetXImpl5.initMetaData(CachedRowSetXImpl5.java:750)
at com.sun.sql.rowset.CachedRowSetXImpl5.getMetaData(CachedRowSetXImpl5.java:2291)
at com.icesoft.faces.dt.datatable.HtmlDataTableState$ResultSetInfo.refreshColumns(HtmlDataTableState.java:181)
at com.icesoft.faces.dt.datatable.HtmlDataTableState.refreshColumnInfo(HtmlDataTableState.java:118)
at com.icesoft.faces.component.ext.HtmlDataTableDesignInfo.linkBeans(HtmlDataTableDesignInfo.java:50)
at org.netbeans.modules.visualweb.insync.models.FacesModel.linkBeans(FacesModel.java:1220)
at org.netbeans.modules.visualweb.designer.jsf.JsfForm.linkDesignBeans(JsfForm.java:2951)
at org.netbeans.modules.visualweb.designer.jsf.FacesDndSupport.processLinks(FacesDndSupport.java:1090)
at org.netbeans.modules.visualweb.designer.jsf.FacesDndSupport.importBean(FacesDndSupport.java:650)
at org.netbeans.modules.visualweb.designer.jsf.FacesDndSupport.importData(FacesDndSupport.java:416)
at org.netbeans.modules.visualweb.designer.jsf.FacesDndSupport.importData(FacesDndSupport.java:3700)
at org.netbeans.modules.visualweb.designer.jsf.DndSupport.importData(DndSupport.java:592)
at org.netbeans.modules.visualweb.designer.jsf.DomProviderImpl.importData(DomProviderImpl.java:1194)
at org.netbeans.modules.visualweb.designer.WebForm.importData(WebForm.java:2235)
at org.netbeans.modules.visualweb.designer.DndHandler.importDataExt(DndHandler.java:493)
at org.netbeans.modules.visualweb.designer.DndHandler.importData(DndHandler.java:351)
at org.netbeans.modules.visualweb.designer.DesignerTransferHandler.importData(DesignerTransferHandler.java:92)
at org.netbeans.modules.visualweb.designer.DesignerPaneDropTarget$DefaultTransferHandlerDropTargetListener.drop(DesignerPaneDropTarget.java:235)
at java.awt.dnd.DropTarget.drop(DropTarget.java:434)
at org.netbeans.modules.visualweb.designer.DesignerPaneDropTarget.drop(DesignerPaneDropTarget.java:153)
at sun.awt.dnd.SunDropTargetContextPeer.processDropMessage(SunDropTargetContextPeer.java:500)
at sun.awt.X11.XDropTargetContextPeer.processDropMessage(XDropTargetContextPeer.java:165)
at sun.awt.dnd.SunDropTargetContextPeer$EventDispatcher.dispatchDropEvent(SunDropTargetContextPeer.java:812)
at sun.awt.dnd.SunDropTargetContextPeer$EventDispatcher.dispatchEvent(SunDropTargetContextPeer.java:736)
at sun.awt.dnd.SunDropTargetEvent.dispatch(SunDropTargetEvent.java:30)
at java.awt.Component.dispatchEventImpl(Component.java:4358)
at java.awt.Container.dispatchEventImpl(Container.java:2081)
at java.awt.Component.dispatchEvent(Component.java:4331)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4301)
at java.awt.LightweightDispatcher.processDropTargetEvent(Container.java:4036)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3890)
at java.awt.Container.dispatchEventImpl(Container.java:2067)
at java.awt.Window.dispatchEventImpl(Window.java:2458)
at java.awt.Component.dispatchEvent(Component.java:4331)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:104)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)

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