OK, so without parenthesis.
session.AddRawConfiguration "Interface\CopyParam\IgnorePermErrors", "1"
Please note that this is not a site to learn a programming in VBScript.
Thanks again Martin,
I hear what you are saying, but this was a question directly regarding the structure of a WinSCP specific syntax for VB Script. It wasn't a question of something that was native to VB Script, (a good possibility if it were, I would have been able to find examples via Google searches). I am sure as a programmer / developer, when you Google syntax in most programming or script development languages you usually get documentation with lots of examples(depending on the popularity of the scripting / development language), or threads on forums, as well as other online resources. For example, if I were using Powershell, there was a specific example of the function call syntax. I suppose I could have spent some time in doing some trial and error to derive the proper syntax i.e. tried without parenthesis.
Having said that, I really appreciate you going the extra mile. I hope I am done with these kind of obscure questions. Thanks again for all of your help. You are truly a MVP as far as support and help for WinSCP!