pywintypes.com_error: (-2147221005, 'Invalid class string', None, None)

Hi,

I’m using python 3.8.5 32 bit and also I have installed pywin32 by this command pip install pywin32 but when I execute my coed i’m getting the following error pywintypes.com_error: (-2147221005, 'Invalid class string', None, None)

My code :

import win32com.client

client = win32com.client.Dispatch('OpcLabs.EasyOpc.DataAccess.EasyDAClient')

value = client.ReadItemValue('','OPCLabs.KitServer.2', 'Demo.Single')

print('value:',value)

output:

Traceback (most recent call last):

File "C:\Users\Lenovo\AppData\Local\Programs\Python\Python38-32\lib\site-packages\win32com\client\dynamic.py", line 89, in _GetGoodDispatch

IDispatch = pythoncom.connect(IDispatch)

pywintypes.com_error: (-2147221005, 'Invalid class string', None, None)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):

File ".\test.py", line 3, in <module>

client = win32com.client.Dispatch('OpcLabs.EasyOpc.DataAccess.EasyDAClient')

File "C:\Users\Lenovo\AppData\Local\Programs\Python\Python38-32\lib\site-packages\win32com\client\__init__.py", line 95, in Dispatch

dispatch, userName = dynamic._GetGoodDispatchAndUserName(dispatch,userName,clsctx)

File "C:\Users\Lenovo\AppData\Local\Programs\Python\Python38-32\lib\site-packages\win32com\client\dynamic.py", line 114, in _GetGoodDispatchAndUserName

return (_GetGoodDispatch(IDispatch, clsctx), userName)

File "C:\Users\Lenovo\AppData\Local\Programs\Python\Python38-32\lib\site-packages\win32com\client\dynamic.py", line 91, in _GetGoodDispatch

IDispatch = pythoncom.CoCreateInstance(IDispatch, None, clsctx, pythoncom.IID_IDispatch)

pywintypes.com_error: (-2147221005, 'Invalid class string', None, None)

can you help me with this?

Thanks & Regards,

Saleem.

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