最新版本6.1.14268.2520导入联系人错误

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最新版本6.1.14268.2520导入联系人错误，欲导入的联系人列表也是由该版本导出来的。windows7系统。

错误信息-----------------------------------------------------
System.NullReferenceException: Object reference not set to an instance of an object.
   at ..
(Passenger ) in #Wb:line 191
   at System.Linq.Enumerable.WhereArrayIterator`1.MoveNext()
   at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
   at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
   at ..
(Passenger[] ) in #Wb:line 190
   at ..
(String ) in #Wb:line 185
   at ..() in #Wb:line 131
   at ..(Object , EventArgs ) in #Wb:line 16777215
   at System.Windows.Forms.Control.OnClick(EventArgs e)
   at System.Windows.Forms.Button.OnClick(EventArgs e)
   at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
   at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ButtonBase.WndProc(Message& m)
   at System.Windows.Forms.Button.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)