Thank you for your response I will to that . But my issue is not only with Quickopc , I have installed OpenOPC in that also I’m getting same error My code: import OpenOPC opc = OpenOPC.client() Output Error: Traceback (most recent call last): File "C:\Users\Saleem\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 "C:\Users\Saleem\AppData\Local\Programs\Python\Python38-32\lib\site-packages\OpenOPC.py", line 167, in __init__ self._opc = win32com.client.gencache.EnsureDispatch(c, 0) File "C:\Users\Saleem\AppData\Local\Programs\Python\Python38-32\lib\site-packages\win32com\client\gencache.py", line 527, in EnsureDispatch disp = win32com.client.Dispatch(prog_id) File "C:\Users\Saleem\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\Saleem\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\Saleem\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) During handling of the above exception, another exception occurred: Traceback (most recent call last): File ".\test.py", line 7, in <module> opc = OpenOPC.client() File "C:\Users\Saleem\AppData\Local\Programs\Python\Python38-32\lib\site-packages\OpenOPC.py", line 173, in __init__ raise OPCError(error_msg) OpenOPC.OPCError: Dispatch: Invalid class string OpenOPC I have installed from here https://pypi.org/project/OpenOPC-Python3x/ and how to use examples is here http://openopc.sourceforge.net/api.html . In my Case pywin32 is not matching with the version python I’m using . Python version I’m using downloaded from here : https://www.python.org/ftp/python/3.8.5/python-3.8.5.exe Pywin32 downloaded from here : https://github.com/mhammond/pywin32/releases/download/b228/pywin32-228.win32-py3.8.exe Can you please suggest me the versions which I can use to solve this errors , because the same version I’m using in another windows laptop there I’m not getting this errors. Thanks & Regards, Saleem. From: Tim Roberts Shaik Saleem Basha wrote: > When I downloaded install python by default it installed 32bit > version only so pywin32 also I installed 32bit only > Quicopc library is installed If QuickOPC is a 64-bit component, then you need to call it from a 64-bit process. This is not always an easy thing to determine. If a company wants to support both 32-bit and 64-bit processes, then it has to install two different COM servers. I suggest you describe your problem to the QuickOPC folks; they would know right away if this were the issue. -- Tim Roberts, t...@probo.com Providenza & Boekelheide, Inc. |
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