File "D:\Python35\lib\site-packages\win32com\client\dynamic.py", line 89, in _GetGoodDispatch
IDispatch = pythoncom.connect(IDispatch)
pywintypes.com_error: (-2147221005, '無效的類字串', None, None)
在處理上述例外時，另一個例外發生：
回溯（最后呼叫）:
File "D:\Python35\1.py", line 2, in <module>
Vissim=com.Dispatch('Vissim.Vissim') #創造com服務介面
File "D:\Python35\lib\site-packages\win32com\client\__init__.py", line 95, in Dispatch
dispatch, userName = dynamic._GetGoodDispatchAndUserName(dispatch,userName,clsctx)
File "D:\Python35\lib\site-packages\win32com\client\dynamic.py", line 114, in _GetGoodDispatchAndUserName
return (_GetGoodDispatch(IDispatch, clsctx), userName)
File "D:\Python35\lib\site-packages\win32com\client\dynamic.py", line 91, in _GetGoodDispatch
IDispatch = pythoncom.CoCreateInstance(IDispatch, None, clsctx, pythoncom.IID_IDispatch)
pywintypes.com_error: (-2147221005, '無效的類字串', None, None)
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