报表打开报错Object reference not set to an instance of an object.

报错信息如下，请问怎么处理？？

发生时间： 2016年11月18日 21:54:30
错误来源： Kingdee.BOS.WinForm.KDSReportCtl
错误信息： Object reference not set to an instance of an object.
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调用堆栈：
at Kingdee.BOS.WinForm.KDSReportCtl.frmSheetList.InitializeComponent()
at Kingdee.BOS.WinForm.Ctrl.KDDynamicForm..ctor(String formId, Boolean isList)
at Kingdee.BOS.WinForm.KDSReportCtl.frmSheetList..ctor(ReportCtl mCtrl)
at Kingdee.BOS.KDSReport.frmSpread.Export2Excel()
at Kingdee.BOS.KDSReport.frmMain.bar_ItemClick(Object sender, ItemClickEventArgs e)
at DevExpress.XtraBars.BarItemLink.OnLinkClick()
at DevExpress.XtraBars.BarButtonItemLink.OnLinkAction(BarLinkAction action, Object actionArgs)
at DevExpress.XtraBars.ViewInfo.BarSelectionInfo.UnPressLink(BarItemLink link)
at DevExpress.XtraBars.Controls.CustomLinksControl.OnMouseUp(MouseEventArgs e)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at DevExpress.XtraBars.Controls.CustomControl.WndProc(Message& msg)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
错误数据： System.Collections.ListDictionaryInternal