Please read my previous post again carefully.
The Session.GetFiles can remove the downloaded files for you. Just pass $True to the remove parameter.

Hi,

Thanks for the response. The $session.GetFiles works as expected. It is the $session.RemoveFiles command that I am having trouble with. Once I download the PDF files, I would like to remove the PDF files from the remote location. Only the remote PDF files.

Your code seems to be correct syntactically. I cannot imagine that you are getting the error you have posted with the code you have posted. Please double check that you are running the right code.
In any case, the right solution is to pass $True to the remove parameter of Session.GetFiles:

See https://winscp.net/eng/docs/library_session_getfiles

Hello,

I am trying to remove files from a remote server after I have downloaded them to my local server. I found some code from the forum. The commands I am using are the following:

When trying this, I am receiving an error.

Cannot find an overload for "RemoveFiles" and the argument count: "3"

What is the syntax of the command I should be using? I only want to remove the pdf files in this folder.
Thank you