请教：２００６中如何将一个文件的图层状态复制到另一个文件当中

jy278433

当我在新文件中输入图层状态的时候，会报错内容如下：

有关调用实时(JIT)调试而不是此对话框的详细信息，
请参阅此消息的结尾。

************** 异常文本 **************
System.Reflection.TargetInvocationException: 调用的目标发生了异常。 ---> System.NullReferenceException: 未将对象引用设置到对象的实例。
   at Autodesk.AutoCAD.LayerManager.MainForm.Application_Idle(Object sender, EventArgs e)
   at System.Windows.Forms.ThreadContext.System.Windows.Forms.UnsafeNativeMethods+IMsoComponent.FDoIdle(Int32 grfidlef)
   at System.Windows.Forms.ComponentManager.System.Windows.Forms.UnsafeNativeMethods+IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData)
   at System.Windows.Forms.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
   at System.Windows.Forms.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
   at System.Windows.Forms.Application.RunDialog(Form form)
   at System.Windows.Forms.Form.ShowDialog(IWin32Window owner)
   at Autodesk.AutoCAD.ApplicationServices.Application.ShowModalDialog(IWin32Window owner, Form formToShow, Boolean persistSizeAndPosition)
   at Autodesk.AutoCAD.ApplicationServices.Application.ShowModalDialog(IWin32Window owner, Form formToShow)
   at Autodesk.AutoCAD.LayerManager.MainForm.RunForm(IWin32Window owner, Database db)
   at Autodesk.AutoCAD.LayerManager.Commands.Layer()
   --- 内部异常堆栈跟踪的结尾 ---
   at System.Reflection.RuntimeMethodInfo.InternalInvoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean isBinderDefault, Assembly caller, Boolean verifyAccess)
   at System.Reflection.RuntimeMethodInfo.InternalInvoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean verifyAccess)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at AcMgPerDocumentCommandClass.Invoke(AcMgPerDocumentCommandClass* , gcroot<System::Reflection::MethodInfo __gc *>* mi)
   at Autodesk.AutoCAD.Runtime.SEHExceptionFilter.InvokeWorker()
   at Autodesk.AutoCAD.Runtime.ExceptionFilter.Invoke()

请大家指教