[python-win32] pywintypes.com_error: (-2147221005, 'Invalid class string', None, None)

[Tim Roberts]

Shaik Saleem Basha wrote:
>
> 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)
>
The most obvious question, of course, is do you actually have the 
QuickOPC .NET library installed?

Why did you choose the 32-bit Python, instead of the 64-bit Python?

-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


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