I think it is some configuration to be done. I tried on a different computer, it gave the same error. Thank you for your help. I will try the .Net API for the purpose.  ... View more

import win32com.client server=win32com.client.Dispatch('Serck.ScxV6Server') server.Connect(' ',' ',' ')   AnalogObj=server.FindObject('Example Projects.Analog Point') AnalogObj.Interface.Historic.LoadDataValue(1, 192, #01/02/2020 10:10:10#, 1)   (I am not able to use the interface property at all. I am using Visual Studio Community 2019, should I try a different version?) ... View more

I checked the definition of Interface: And this is what it shows.  ... View more

Yes it looks exactly like that. ... View more

@sbeadle I have faced that issue before with my Python script as well. I rechecked that, and the time is in the range. @AndrewScott  I registered the dll with success. But I am still receiving that error. @JChamberlain I have the "Scx V6 Automation Interface" Reference attached. And my bad for forgetting to copy the script correctly. I have created the server object in it. I am able to connect to the server and FindObject/ Write to Opc properties and Enable the Historic Aggregate. But not able to  use "LoadDataValue()" I am not able to use any methods of the Interface property specifically.    Thank you all for trying to help. ... View more

When I look at the definition for "Interface", it shows it as a "Read Only" Object Property. The possible methods under the Property are : Equals, GetHashCode, GetType, ToString.  ... View more

I tried putting in a timestamp variable as well. But it is giving the same error as 'LoadDataValue' on type '_ComObject' not found. Is there another reference I should try adding to the solution? Or is there a specific time stamp format?    Dim tryDateTime As Date   tryDateTime = #01/01/2020 10:14 PM#   his.Interface.LoadDataValue(1, 192, tryDateTime, 1) ... View more

It is giving me the same error. ... View more