FTP to Mainframe

Hi all, I am a newbie to FTP and Mainframe so please ask me if you don't understand the question.

How do you ftp a file to Mainframe as GDG (Generation Data Group)

Thanks for all of your help
--ATY--

Just spoken to my 'pet' MVS guru ..

A simple put filename gdg.dataset(+1) where the (+1) is the critical part will work.

Later: of course it goes without saying ... use (0) for the latest GDG, (-1) for last but one GDG, and the (+1) used above creates a new GDG.

You answered a question concerning FTP'ing to the Mainframe with the below:

Just spoken to my 'pet' MVS guru ..

A simple put filename gdg.dataset(+1) where the (+1) is the critical part will work.

Later: of course it goes without saying ... use (0) for the latest GDG, (-1) for last but one GDG, and the (+1) used above creates a new GDG.
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That is how the we are doing an FTP, however, once the file hits the mainframe it's DCB info is LRECL=128 BLKSIZE=6144... we need this file to show as LRECL=400 BLKSIZE=27600. What is occurring is this is an existing process where EDI/Gentran was creating the file on the MF with a MF job and now that process is being replaced with AS2 creating the file via an FTP from a server via Webmethod. I am on the MF side and don't know anything about the AS2 side and the AS2 folks don't know what to do as well. Any help is appreciated.